From eb478b443aa1ca87c63c914694831a609b35de82 Mon Sep 17 00:00:00 2001
From: Rob Riggs <rob@pangalactic.org>
Date: Sun, 21 Feb 2021 20:48:09 -0600
Subject: [PATCH] Sync NucleoTNC firmware with TNC3 v2.1.8 codebase.  Upgrade
 compiler to GCC 10.2.  Upgrade to C++20 for std::span.  Changes to reduce
 stack utilization.  Reduce jitter by adjusting clocks & interrupt priority. 
 Fix serial port timeout on large packets.  Use floating point for M17
 modulator.  Fix LICH decode defect.

---
 .cproject                          |  17 +-
 .mxproject                         |  21 +-
 Inc/FreeRTOSConfig.h               |   6 +-
 STM32L432KC_FLASH.ld               |   2 +-
 Src/arm_fir_interpolate_f32.c      | 581 +++++++++++++++++++++++++++++
 Src/arm_fir_interpolate_init_f32.c | 121 ++++++
 Src/main.c                         |  32 +-
 TNC/AFSKTestTone.cpp               |   2 +-
 TNC/Golay24.h                      |   1 +
 TNC/HdlcFrame.cpp                  |   1 +
 TNC/IOEventTask.cpp                |   2 +-
 TNC/KissHardware.cpp               |  20 +-
 TNC/KissHardware.hpp               |   1 -
 TNC/M17.cpp                        |  79 +++-
 TNC/M17.h                          |  13 +
 TNC/M17Demodulator.cpp             |   4 +-
 TNC/M17Demodulator.h               |  18 +-
 TNC/M17Encoder.cpp                 |  48 ++-
 TNC/M17Encoder.h                   |   3 +-
 TNC/M17FrameDecoder.h              |  68 ++--
 TNC/M17Modulator.cpp               |   3 +-
 TNC/M17Modulator.h                 |  57 ++-
 TNC/Viterbi.h                      |  65 ++--
 23 files changed, 1020 insertions(+), 145 deletions(-)
 create mode 100644 Src/arm_fir_interpolate_f32.c
 create mode 100644 Src/arm_fir_interpolate_init_f32.c

diff --git a/.cproject b/.cproject
index 4995eee..c9df6f8 100644
--- a/.cproject
+++ b/.cproject
@@ -120,11 +120,11 @@
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@@ -207,14 +207,14 @@
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@@ -251,6 +251,9 @@
 							</tool>
 						</toolChain>
 					</folderInfo>
+					<sourceEntries>
+						<entry flags="VALUE_WORKSPACE_PATH" kind="sourcePath" name=""/>
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 				</configuration>
 			</storageModule>
 			<storageModule moduleId="org.eclipse.cdt.core.externalSettings"/>
@@ -282,7 +285,7 @@
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@@ -560,4 +563,4 @@
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\ No newline at end of file
diff --git a/.mxproject b/.mxproject
index a2cf9b1..4e4e5fe 100644
--- a/.mxproject
+++ b/.mxproject
@@ -1,14 +1,19 @@
+[PreviousLibFiles]
+LibFiles=Drivers/STM32L4xx_HAL_Driver/Inc/stm32l4xx_hal_adc.h;Drivers/STM32L4xx_HAL_Driver/Inc/stm32l4xx_ll_adc.h;Drivers/STM32L4xx_HAL_Driver/Inc/stm32l4xx_hal_adc_ex.h;Drivers/STM32L4xx_HAL_Driver/Inc/stm32l4xx_hal.h;Drivers/STM32L4xx_HAL_Driver/Inc/stm32l4xx_hal_def.h;Drivers/STM32L4xx_HAL_Driver/Inc/Legacy/stm32_hal_legacy.h;Drivers/STM32L4xx_HAL_Driver/Inc/stm32l4xx_hal_i2c.h;Drivers/STM32L4xx_HAL_Driver/Inc/stm32l4xx_hal_i2c_ex.h;Drivers/STM32L4xx_HAL_Driver/Inc/stm32l4xx_hal_rcc.h;Drivers/STM32L4xx_HAL_Driver/Inc/stm32l4xx_hal_rcc_ex.h;Drivers/STM32L4xx_HAL_Driver/Inc/stm32l4xx_hal_flash.h;Drivers/STM32L4xx_HAL_Driver/Inc/stm32l4xx_hal_flash_ex.h;Drivers/STM32L4xx_HAL_Driver/Inc/stm32l4xx_hal_flash_ramfunc.h;Drivers/STM32L4xx_HAL_Driver/Inc/stm32l4xx_hal_gpio.h;Drivers/STM32L4xx_HAL_Driver/Inc/stm32l4xx_hal_gpio_ex.h;Drivers/STM32L4xx_HAL_Driver/Inc/stm32l4xx_hal_dma.h;Drivers/STM32L4xx_HAL_Driver/Inc/stm32l4xx_hal_dma_ex.h;Drivers/STM32L4xx_HAL_Driver/Inc/stm32l4xx_hal_pwr.h;Drivers/STM32L4xx_HAL_Driver/Inc/stm32l4xx_hal_pwr_ex.h;Drivers/STM32L4xx_HAL_Driver/Inc/stm32l4xx_hal_cortex.h;Drivers/STM32L4xx_HAL_Driver/Inc/stm32l4xx_hal_exti.h;Drivers/STM32L4xx_HAL_Driver/Inc/stm32l4xx_hal_crc.h;Drivers/STM32L4xx_HAL_Driver/Inc/stm32l4xx_hal_crc_ex.h;Drivers/STM32L4xx_HAL_Driver/Inc/stm32l4xx_hal_dac.h;Drivers/STM32L4xx_HAL_Driver/Inc/stm32l4xx_hal_dac_ex.h;Drivers/STM32L4xx_HAL_Driver/Inc/stm32l4xx_hal_opamp.h;Drivers/STM32L4xx_HAL_Driver/Inc/stm32l4xx_hal_opamp_ex.h;Drivers/STM32L4xx_HAL_Driver/Inc/stm32l4xx_hal_rng.h;Drivers/STM32L4xx_HAL_Driver/Inc/stm32l4xx_hal_rtc.h;Drivers/STM32L4xx_HAL_Driver/Inc/stm32l4xx_hal_rtc_ex.h;Drivers/STM32L4xx_HAL_Driver/Inc/stm32l4xx_hal_tim.h;Drivers/STM32L4xx_HAL_Driver/Inc/stm32l4xx_hal_tim_ex.h;Drivers/STM32L4xx_HAL_Driver/Inc/stm32l4xx_hal_uart.h;Drivers/STM32L4xx_HAL_Driver/Inc/stm32l4xx_hal_uart_ex.h;Middlewares/Third_Party/FreeRTOS/Source/include/croutine.h;Middlewares/Third_Party/FreeRTOS/Source/include/deprecated_definitions.h;Middlewares/Third_Party/FreeRTOS/Source/include/event_groups.h;Middlewares/Third_Party/FreeRTOS/Source/include/FreeRTOS.h;Middlewares/Third_Party/FreeRTOS/Source/include/list.h;Middlewares/Third_Party/FreeRTOS/Source/include/message_buffer.h;Middlewares/Third_Party/FreeRTOS/Source/include/mpu_prototypes.h;Middlewares/Third_Party/FreeRTOS/Source/include/mpu_wrappers.h;Middlewares/Third_Party/FreeRTOS/Source/include/portable.h;Middlewares/Third_Party/FreeRTOS/Source/include/projdefs.h;Middlewares/Third_Party/FreeRTOS/Source/include/queue.h;Middlewares/Third_Party/FreeRTOS/Source/include/semphr.h;Middlewares/Third_Party/FreeRTOS/Source/include/stack_macros.h;Middlewares/Third_Party/FreeRTOS/Source/include/StackMacros.h;Middlewares/Third_Party/FreeRTOS/Source/include/stream_buffer.h;Middlewares/Third_Party/FreeRTOS/Source/include/task.h;Middlewares/Third_Party/FreeRTOS/Source/include/timers.h;Middlewares/Third_Party/FreeRTOS/Source/CMSIS_RTOS/cmsis_os.h;Middlewares/Third_Party/FreeRTOS/Source/portable/GCC/ARM_CM4F/portmacro.h;Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_adc.c;Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_adc_ex.c;Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal.c;Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_i2c.c;Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_i2c_ex.c;Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_rcc.c;Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_rcc_ex.c;Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_flash.c;Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_flash_ex.c;Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_flash_ramfunc.c;Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_gpio.c;Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_dma.c;Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_dma_ex.c;Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_pwr.c;Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_pwr_ex.c;Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_cortex.c;Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_exti.c;Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_crc.c;Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_crc_ex.c;Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_dac.c;Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_dac_ex.c;Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_opamp.c;Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_opamp_ex.c;Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_rng.c;Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_rtc.c;Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_rtc_ex.c;Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_tim.c;Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_tim_ex.c;Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_uart.c;Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_uart_ex.c;Middlewares/Third_Party/FreeRTOS/Source/croutine.c;Middlewares/Third_Party/FreeRTOS/Source/event_groups.c;Middlewares/Third_Party/FreeRTOS/Source/list.c;Middlewares/Third_Party/FreeRTOS/Source/queue.c;Middlewares/Third_Party/FreeRTOS/Source/stream_buffer.c;Middlewares/Third_Party/FreeRTOS/Source/tasks.c;Middlewares/Third_Party/FreeRTOS/Source/timers.c;Middlewares/Third_Party/FreeRTOS/Source/CMSIS_RTOS/cmsis_os.c;Middlewares/Third_Party/FreeRTOS/Source/portable/MemMang/heap_4.c;Middlewares/Third_Party/FreeRTOS/Source/portable/GCC/ARM_CM4F/port.c;Drivers/STM32L4xx_HAL_Driver/Inc/stm32l4xx_hal_adc.h;Drivers/STM32L4xx_HAL_Driver/Inc/stm32l4xx_ll_adc.h;Drivers/STM32L4xx_HAL_Driver/Inc/stm32l4xx_hal_adc_ex.h;Drivers/STM32L4xx_HAL_Driver/Inc/stm32l4xx_hal.h;Drivers/STM32L4xx_HAL_Driver/Inc/stm32l4xx_hal_def.h;Drivers/STM32L4xx_HAL_Driver/Inc/Legacy/stm32_hal_legacy.h;Drivers/STM32L4xx_HAL_Driver/Inc/stm32l4xx_hal_i2c.h;Drivers/STM32L4xx_HAL_Driver/Inc/stm32l4xx_hal_i2c_ex.h;Drivers/STM32L4xx_HAL_Driver/Inc/stm32l4xx_hal_rcc.h;Drivers/STM32L4xx_HAL_Driver/Inc/stm32l4xx_hal_rcc_ex.h;Drivers/STM32L4xx_HAL_Driver/Inc/stm32l4xx_hal_flash.h;Drivers/STM32L4xx_HAL_Driver/Inc/stm32l4xx_hal_flash_ex.h;Drivers/STM32L4xx_HAL_Driver/Inc/stm32l4xx_hal_flash_ramfunc.h;Drivers/STM32L4xx_HAL_Driver/Inc/stm32l4xx_hal_gpio.h;Drivers/STM32L4xx_HAL_Driver/Inc/stm32l4xx_hal_gpio_ex.h;Drivers/STM32L4xx_HAL_Driver/Inc/stm32l4xx_hal_dma.h;Drivers/STM32L4xx_HAL_Driver/Inc/stm32l4xx_hal_dma_ex.h;Drivers/STM32L4xx_HAL_Driver/Inc/stm32l4xx_hal_pwr.h;Drivers/STM32L4xx_HAL_Driver/Inc/stm32l4xx_hal_pwr_ex.h;Drivers/STM32L4xx_HAL_Driver/Inc/stm32l4xx_hal_cortex.h;Drivers/STM32L4xx_HAL_Driver/Inc/stm32l4xx_hal_exti.h;Drivers/STM32L4xx_HAL_Driver/Inc/stm32l4xx_hal_crc.h;Drivers/STM32L4xx_HAL_Driver/Inc/stm32l4xx_hal_crc_ex.h;Drivers/STM32L4xx_HAL_Driver/Inc/stm32l4xx_hal_dac.h;Drivers/STM32L4xx_HAL_Driver/Inc/stm32l4xx_hal_dac_ex.h;Drivers/STM32L4xx_HAL_Driver/Inc/stm32l4xx_hal_opamp.h;Drivers/STM32L4xx_HAL_Driver/Inc/stm32l4xx_hal_opamp_ex.h;Drivers/STM32L4xx_HAL_Driver/Inc/stm32l4xx_hal_rng.h;Drivers/STM32L4xx_HAL_Driver/Inc/stm32l4xx_hal_rtc.h;Drivers/STM32L4xx_HAL_Driver/Inc/stm32l4xx_hal_rtc_ex.h;Drivers/STM32L4xx_HAL_Driver/Inc/stm32l4xx_hal_tim.h;Drivers/STM32L4xx_HAL_Driver/Inc/stm32l4xx_hal_tim_ex.h;Drivers/STM32L4xx_HAL_Driver/Inc/stm32l4xx_hal_uart.h;Drivers/STM32L4xx_HAL_Driver/Inc/stm32l4xx_hal_uart_ex.h;Middlewares/Third_Party/FreeRTOS/Source/include/croutine.h;Middlewares/Third_Party/FreeRTOS/Source/include/deprecated_definitions.h;Middlewares/Third_Party/FreeRTOS/Source/include/event_groups.h;Middlewares/Third_Party/FreeRTOS/Source/include/FreeRTOS.h;Middlewares/Third_Party/FreeRTOS/Source/include/list.h;Middlewares/Third_Party/FreeRTOS/Source/include/message_buffer.h;Middlewares/Third_Party/FreeRTOS/Source/include/mpu_prototypes.h;Middlewares/Third_Party/FreeRTOS/Source/include/mpu_wrappers.h;Middlewares/Third_Party/FreeRTOS/Source/include/portable.h;Middlewares/Third_Party/FreeRTOS/Source/include/projdefs.h;Middlewares/Third_Party/FreeRTOS/Source/include/queue.h;Middlewares/Third_Party/FreeRTOS/Source/include/semphr.h;Middlewares/Third_Party/FreeRTOS/Source/include/stack_macros.h;Middlewares/Third_Party/FreeRTOS/Source/include/StackMacros.h;Middlewares/Third_Party/FreeRTOS/Source/include/stream_buffer.h;Middlewares/Third_Party/FreeRTOS/Source/include/task.h;Middlewares/Third_Party/FreeRTOS/Source/include/timers.h;Middlewares/Third_Party/FreeRTOS/Source/CMSIS_RTOS/cmsis_os.h;Middlewares/Third_Party/FreeRTOS/Source/portable/GCC/ARM_CM4F/portmacro.h;Drivers/CMSIS/Device/ST/STM32L4xx/Include/stm32l432xx.h;Drivers/CMSIS/Device/ST/STM32L4xx/Include/stm32l4xx.h;Drivers/CMSIS/Device/ST/STM32L4xx/Include/system_stm32l4xx.h;Drivers/CMSIS/Device/ST/STM32L4xx/Source/Templates/system_stm32l4xx.c;Drivers/CMSIS/Include/core_armv8mml.h;Drivers/CMSIS/Include/cmsis_iccarm.h;Drivers/CMSIS/Include/tz_context.h;Drivers/CMSIS/Include/core_armv81mml.h;Drivers/CMSIS/Include/core_sc000.h;Drivers/CMSIS/Include/cmsis_gcc.h;Drivers/CMSIS/Include/core_cm0plus.h;Drivers/CMSIS/Include/core_armv8mbl.h;Drivers/CMSIS/Include/cmsis_compiler.h;Drivers/CMSIS/Include/core_cm23.h;Drivers/CMSIS/Include/core_cm0.h;Drivers/CMSIS/Include/core_cm35p.h;Drivers/CMSIS/Include/cmsis_armcc.h;Drivers/CMSIS/Include/mpu_armv7.h;Drivers/CMSIS/Include/cmsis_version.h;Drivers/CMSIS/Include/mpu_armv8.h;Drivers/CMSIS/Include/core_cm1.h;Drivers/CMSIS/Include/core_cm3.h;Drivers/CMSIS/Include/core_cm7.h;Drivers/CMSIS/Include/core_cm33.h;Drivers/CMSIS/Include/cmsis_armclang_ltm.h;Drivers/CMSIS/Include/core_sc300.h;Drivers/CMSIS/Include/cmsis_armclang.h;Drivers/CMSIS/Include/core_cm4.h;
+
+[PreviousUsedTStudioFiles]
+SourceFiles=../Src/main.c;../Src/freertos.c;../Src/stm32l4xx_it.c;../Src/stm32l4xx_hal_msp.c;../Src/stm32l4xx_hal_timebase_tim.c;../Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_adc.c;../Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_adc_ex.c;../Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal.c;../Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_i2c.c;../Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_i2c_ex.c;../Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_rcc.c;../Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_rcc_ex.c;../Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_flash.c;../Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_flash_ex.c;../Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_flash_ramfunc.c;../Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_gpio.c;../Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_dma.c;../Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_dma_ex.c;../Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_pwr.c;../Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_pwr_ex.c;../Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_cortex.c;../Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_exti.c;../Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_crc.c;../Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_crc_ex.c;../Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_dac.c;../Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_dac_ex.c;../Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_opamp.c;../Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_opamp_ex.c;../Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_rng.c;../Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_rtc.c;../Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_rtc_ex.c;../Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_tim.c;../Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_tim_ex.c;../Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_uart.c;../Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_uart_ex.c;../Middlewares/Third_Party/FreeRTOS/Source/croutine.c;../Middlewares/Third_Party/FreeRTOS/Source/event_groups.c;../Middlewares/Third_Party/FreeRTOS/Source/list.c;../Middlewares/Third_Party/FreeRTOS/Source/queue.c;../Middlewares/Third_Party/FreeRTOS/Source/stream_buffer.c;../Middlewares/Third_Party/FreeRTOS/Source/tasks.c;../Middlewares/Third_Party/FreeRTOS/Source/timers.c;../Middlewares/Third_Party/FreeRTOS/Source/CMSIS_RTOS/cmsis_os.c;../Middlewares/Third_Party/FreeRTOS/Source/portable/MemMang/heap_4.c;../Middlewares/Third_Party/FreeRTOS/Source/portable/GCC/ARM_CM4F/port.c;..//Src/system_stm32l4xx.c;../Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_adc.c;../Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_adc_ex.c;../Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal.c;../Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_i2c.c;../Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_i2c_ex.c;../Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_rcc.c;../Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_rcc_ex.c;../Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_flash.c;../Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_flash_ex.c;../Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_flash_ramfunc.c;../Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_gpio.c;../Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_dma.c;../Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_dma_ex.c;../Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_pwr.c;../Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_pwr_ex.c;../Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_cortex.c;../Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_exti.c;../Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_crc.c;../Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_crc_ex.c;../Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_dac.c;../Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_dac_ex.c;../Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_opamp.c;../Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_opamp_ex.c;../Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_rng.c;../Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_rtc.c;../Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_rtc_ex.c;../Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_tim.c;../Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_tim_ex.c;../Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_uart.c;../Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_uart_ex.c;../Middlewares/Third_Party/FreeRTOS/Source/croutine.c;../Middlewares/Third_Party/FreeRTOS/Source/event_groups.c;../Middlewares/Third_Party/FreeRTOS/Source/list.c;../Middlewares/Third_Party/FreeRTOS/Source/queue.c;../Middlewares/Third_Party/FreeRTOS/Source/stream_buffer.c;../Middlewares/Third_Party/FreeRTOS/Source/tasks.c;../Middlewares/Third_Party/FreeRTOS/Source/timers.c;../Middlewares/Third_Party/FreeRTOS/Source/CMSIS_RTOS/cmsis_os.c;../Middlewares/Third_Party/FreeRTOS/Source/portable/MemMang/heap_4.c;../Middlewares/Third_Party/FreeRTOS/Source/portable/GCC/ARM_CM4F/port.c;..//Src/system_stm32l4xx.c;../Drivers/CMSIS/Device/ST/STM32L4xx/Source/Templates/system_stm32l4xx.c;;../Middlewares/Third_Party/FreeRTOS/Source/croutine.c;../Middlewares/Third_Party/FreeRTOS/Source/event_groups.c;../Middlewares/Third_Party/FreeRTOS/Source/list.c;../Middlewares/Third_Party/FreeRTOS/Source/queue.c;../Middlewares/Third_Party/FreeRTOS/Source/stream_buffer.c;../Middlewares/Third_Party/FreeRTOS/Source/tasks.c;../Middlewares/Third_Party/FreeRTOS/Source/timers.c;../Middlewares/Third_Party/FreeRTOS/Source/CMSIS_RTOS/cmsis_os.c;../Middlewares/Third_Party/FreeRTOS/Source/portable/MemMang/heap_4.c;../Middlewares/Third_Party/FreeRTOS/Source/portable/GCC/ARM_CM4F/port.c;
+HeaderPath=../Drivers/STM32L4xx_HAL_Driver/Inc;../Drivers/STM32L4xx_HAL_Driver/Inc/Legacy;../Middlewares/Third_Party/FreeRTOS/Source/include;../Middlewares/Third_Party/FreeRTOS/Source/CMSIS_RTOS;../Middlewares/Third_Party/FreeRTOS/Source/portable/GCC/ARM_CM4F;../Drivers/CMSIS/Device/ST/STM32L4xx/Include;../Drivers/CMSIS/Include;../Inc;
+CDefines=USE_HAL_DRIVER;STM32L432xx;USE_HAL_DRIVER;USE_HAL_DRIVER;
+
 [PreviousGenFiles]
 HeaderPath=/home/rob/workspace/Nucleo_L432KC_TNC/Inc
 HeaderFiles=FreeRTOSConfig.h;stm32l4xx_it.h;stm32l4xx_hal_conf.h;main.h;
 SourcePath=/home/rob/workspace/Nucleo_L432KC_TNC/Src
-SourceFiles=freertos.c;stm32l4xx_it.c;stm32l4xx_hal_msp.c;stm32l4xx_hal_timebase_TIM.c;main.c;
+SourceFiles=freertos.c;stm32l4xx_it.c;stm32l4xx_hal_msp.c;stm32l4xx_hal_timebase_tim.c;main.c;
 
-[PreviousLibFiles]
-LibFiles=Drivers/STM32L4xx_HAL_Driver/Inc/stm32l4xx_hal_adc.h;Drivers/STM32L4xx_HAL_Driver/Inc/stm32l4xx_ll_adc.h;Drivers/STM32L4xx_HAL_Driver/Inc/stm32l4xx_hal_adc_ex.h;Drivers/STM32L4xx_HAL_Driver/Inc/stm32l4xx_hal_crc.h;Drivers/STM32L4xx_HAL_Driver/Inc/stm32l4xx_hal_crc_ex.h;Drivers/STM32L4xx_HAL_Driver/Inc/stm32l4xx_hal_dac.h;Drivers/STM32L4xx_HAL_Driver/Inc/stm32l4xx_hal_dac_ex.h;Drivers/STM32L4xx_HAL_Driver/Inc/stm32l4xx_hal_i2c.h;Drivers/STM32L4xx_HAL_Driver/Inc/stm32l4xx_hal_i2c_ex.h;Drivers/STM32L4xx_HAL_Driver/Inc/stm32l4xx_hal_opamp.h;Drivers/STM32L4xx_HAL_Driver/Inc/stm32l4xx_hal_opamp_ex.h;Drivers/STM32L4xx_HAL_Driver/Inc/stm32l4xx_hal_rng.h;Drivers/STM32L4xx_HAL_Driver/Inc/stm32l4xx_hal_rtc.h;Drivers/STM32L4xx_HAL_Driver/Inc/stm32l4xx_hal_rtc_ex.h;Drivers/STM32L4xx_HAL_Driver/Inc/stm32l4xx_hal_tim.h;Drivers/STM32L4xx_HAL_Driver/Inc/stm32l4xx_hal.h;Drivers/STM32L4xx_HAL_Driver/Inc/stm32l4xx_hal_tim_ex.h;Drivers/STM32L4xx_HAL_Driver/Inc/stm32l4xx_hal_uart.h;Drivers/STM32L4xx_HAL_Driver/Inc/stm32l4xx_hal_uart_ex.h;Drivers/STM32L4xx_HAL_Driver/Inc/stm32l4xx_hal_def.h;Drivers/STM32L4xx_HAL_Driver/Inc/Legacy/stm32_hal_legacy.h;Drivers/STM32L4xx_HAL_Driver/Inc/stm32l4xx_hal_rcc.h;Drivers/STM32L4xx_HAL_Driver/Inc/stm32l4xx_hal_rcc_ex.h;Drivers/STM32L4xx_HAL_Driver/Inc/stm32l4xx_hal_flash.h;Drivers/STM32L4xx_HAL_Driver/Inc/stm32l4xx_hal_flash_ex.h;Drivers/STM32L4xx_HAL_Driver/Inc/stm32l4xx_hal_flash_ramfunc.h;Drivers/STM32L4xx_HAL_Driver/Inc/stm32l4xx_hal_gpio.h;Drivers/STM32L4xx_HAL_Driver/Inc/stm32l4xx_hal_gpio_ex.h;Drivers/STM32L4xx_HAL_Driver/Inc/stm32l4xx_hal_dma.h;Drivers/STM32L4xx_HAL_Driver/Inc/stm32l4xx_hal_dma_ex.h;Drivers/STM32L4xx_HAL_Driver/Inc/stm32l4xx_hal_pwr.h;Drivers/STM32L4xx_HAL_Driver/Inc/stm32l4xx_hal_pwr_ex.h;Drivers/STM32L4xx_HAL_Driver/Inc/stm32l4xx_hal_cortex.h;Middlewares/Third_Party/FreeRTOS/Source/portable/GCC/ARM_CM4F/portmacro.h;Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_adc.c;Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_adc_ex.c;Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_crc.c;Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_crc_ex.c;Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_dac.c;Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_dac_ex.c;Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_i2c.c;Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_i2c_ex.c;Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_opamp.c;Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_opamp_ex.c;Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_rng.c;Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_rtc.c;Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_rtc_ex.c;Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_tim.c;Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_tim_ex.c;Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_uart.c;Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_uart_ex.c;Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal.c;Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_rcc.c;Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_rcc_ex.c;Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_flash.c;Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_flash_ex.c;Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_flash_ramfunc.c;Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_gpio.c;Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_dma.c;Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_dma_ex.c;Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_pwr.c;Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_pwr_ex.c;Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_cortex.c;Middlewares/Third_Party/FreeRTOS/Source/portable/MemMang/heap_4.c;Middlewares/Third_Party/FreeRTOS/Source/portable/GCC/ARM_CM4F/port.c;Drivers/CMSIS/Device/ST/STM32L4xx/Include/stm32l432xx.h;Drivers/CMSIS/Device/ST/STM32L4xx/Include/stm32l4xx.h;Drivers/CMSIS/Device/ST/STM32L4xx/Include/system_stm32l4xx.h;Drivers/CMSIS/Device/ST/STM32L4xx/Source/Templates/system_stm32l4xx.c;Middlewares/Third_Party/FreeRTOS/Source/include/projdefs.h;Middlewares/Third_Party/FreeRTOS/Source/include/deprecated_definitions.h;Middlewares/Third_Party/FreeRTOS/Source/include/FreeRTOS.h;Middlewares/Third_Party/FreeRTOS/Source/include/mpu_prototypes.h;Middlewares/Third_Party/FreeRTOS/Source/include/mpu_wrappers.h;Middlewares/Third_Party/FreeRTOS/Source/include/StackMacros.h;Middlewares/Third_Party/FreeRTOS/Source/include/croutine.h;Middlewares/Third_Party/FreeRTOS/Source/include/timers.h;Middlewares/Third_Party/FreeRTOS/Source/include/queue.h;Middlewares/Third_Party/FreeRTOS/Source/include/event_groups.h;Middlewares/Third_Party/FreeRTOS/Source/include/list.h;Middlewares/Third_Party/FreeRTOS/Source/include/FreeRTOSConfig_template.h;Middlewares/Third_Party/FreeRTOS/Source/include/portable.h;Middlewares/Third_Party/FreeRTOS/Source/include/task.h;Middlewares/Third_Party/FreeRTOS/Source/include/semphr.h;Middlewares/Third_Party/FreeRTOS/Source/CMSIS_RTOS/cmsis_os.h;Middlewares/Third_Party/FreeRTOS/Source/croutine.c;Middlewares/Third_Party/FreeRTOS/Source/tasks.c;Middlewares/Third_Party/FreeRTOS/Source/timers.c;Middlewares/Third_Party/FreeRTOS/Source/queue.c;Middlewares/Third_Party/FreeRTOS/Source/list.c;Middlewares/Third_Party/FreeRTOS/Source/event_groups.c;Middlewares/Third_Party/FreeRTOS/Source/CMSIS_RTOS/cmsis_os.c;Drivers/CMSIS/Include/arm_common_tables.h;Drivers/CMSIS/Include/core_sc000.h;Drivers/CMSIS/Include/cmsis_gcc.h;Drivers/CMSIS/Include/core_cm0plus.h;Drivers/CMSIS/Include/arm_math.h;Drivers/CMSIS/Include/core_cm0.h;Drivers/CMSIS/Include/cmsis_armcc.h;Drivers/CMSIS/Include/core_cmSimd.h;Drivers/CMSIS/Include/core_cmFunc.h;Drivers/CMSIS/Include/core_cm3.h;Drivers/CMSIS/Include/core_cm7.h;Drivers/CMSIS/Include/core_sc300.h;Drivers/CMSIS/Include/core_cm4.h;Drivers/CMSIS/Include/core_cmInstr.h;Drivers/CMSIS/Include/cmsis_armcc_V6.h;Drivers/CMSIS/Include/arm_const_structs.h;
-
-[PreviousUsedTStudioFiles]
-SourceFiles=../Src/main.c;../Src/freertos.c;../Src/stm32l4xx_it.c;../Src/stm32l4xx_hal_msp.c;../Src/stm32l4xx_hal_timebase_TIM.c;../Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_adc.c;../Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_adc_ex.c;../Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_crc.c;../Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_crc_ex.c;../Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_dac.c;../Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_dac_ex.c;../Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_i2c.c;../Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_i2c_ex.c;../Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_opamp.c;../Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_opamp_ex.c;../Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_rng.c;../Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_rtc.c;../Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_rtc_ex.c;../Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_tim.c;../Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_tim_ex.c;../Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_uart.c;../Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_uart_ex.c;../Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal.c;../Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_rcc.c;../Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_rcc_ex.c;../Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_flash.c;../Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_flash_ex.c;../Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_flash_ramfunc.c;../Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_gpio.c;../Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_dma.c;../Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_dma_ex.c;../Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_pwr.c;../Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_pwr_ex.c;../Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_cortex.c;../Middlewares/Third_Party/FreeRTOS/Source/portable/MemMang/heap_4.c;../Middlewares/Third_Party/FreeRTOS/Source/portable/GCC/ARM_CM4F/port.c;../Middlewares/Third_Party/FreeRTOS/Source/croutine.c;../Middlewares/Third_Party/FreeRTOS/Source/tasks.c;../Middlewares/Third_Party/FreeRTOS/Source/timers.c;../Middlewares/Third_Party/FreeRTOS/Source/queue.c;../Middlewares/Third_Party/FreeRTOS/Source/list.c;../Middlewares/Third_Party/FreeRTOS/Source/event_groups.c;../Middlewares/Third_Party/FreeRTOS/Source/CMSIS_RTOS/cmsis_os.c;..//Src/system_stm32l4xx.c;../Drivers/CMSIS/Device/ST/STM32L4xx/Source/Templates/system_stm32l4xx.c;/home/rob/workspace/Nucleo_L432KC_TNC//startup/startup_stm32l432xx.s;../Middlewares/Third_Party/FreeRTOS/Source/portable/MemMang/heap_4.c;../Middlewares/Third_Party/FreeRTOS/Source/portable/GCC/ARM_CM4F/port.c;../Middlewares/Third_Party/FreeRTOS/Source/croutine.c;../Middlewares/Third_Party/FreeRTOS/Source/tasks.c;../Middlewares/Third_Party/FreeRTOS/Source/timers.c;../Middlewares/Third_Party/FreeRTOS/Source/queue.c;../Middlewares/Third_Party/FreeRTOS/Source/list.c;../Middlewares/Third_Party/FreeRTOS/Source/event_groups.c;../Middlewares/Third_Party/FreeRTOS/Source/CMSIS_RTOS/cmsis_os.c;
-HeaderPath=../Drivers/STM32L4xx_HAL_Driver/Inc;../Drivers/STM32L4xx_HAL_Driver/Inc/Legacy;../Middlewares/Third_Party/FreeRTOS/Source/portable/GCC/ARM_CM4F;../Drivers/CMSIS/Device/ST/STM32L4xx/Include;../Middlewares/Third_Party/FreeRTOS/Source/include;../Middlewares/Third_Party/FreeRTOS/Source/CMSIS_RTOS;../Drivers/CMSIS/Include;../Inc;
-CDefines=__weak:"__attribute__((weak))";__packed:"__attribute__((__packed__))";
+[PreviousUsedCubeIDEFiles]
+SourceFiles=Src/main.c;Src/freertos.c;Src/stm32l4xx_it.c;Src/stm32l4xx_hal_msp.c;Src/stm32l4xx_hal_timebase_tim.c;Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_adc.c;Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_adc_ex.c;Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal.c;Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_i2c.c;Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_i2c_ex.c;Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_rcc.c;Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_rcc_ex.c;Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_flash.c;Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_flash_ex.c;Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_flash_ramfunc.c;Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_gpio.c;Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_dma.c;Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_dma_ex.c;Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_pwr.c;Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_pwr_ex.c;Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_cortex.c;Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_exti.c;Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_crc.c;Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_crc_ex.c;Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_dac.c;Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_dac_ex.c;Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_opamp.c;Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_opamp_ex.c;Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_rng.c;Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_rtc.c;Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_rtc_ex.c;Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_tim.c;Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_tim_ex.c;Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_uart.c;Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_uart_ex.c;Middlewares/Third_Party/FreeRTOS/Source/croutine.c;Middlewares/Third_Party/FreeRTOS/Source/event_groups.c;Middlewares/Third_Party/FreeRTOS/Source/list.c;Middlewares/Third_Party/FreeRTOS/Source/queue.c;Middlewares/Third_Party/FreeRTOS/Source/stream_buffer.c;Middlewares/Third_Party/FreeRTOS/Source/tasks.c;Middlewares/Third_Party/FreeRTOS/Source/timers.c;Middlewares/Third_Party/FreeRTOS/Source/CMSIS_RTOS/cmsis_os.c;Middlewares/Third_Party/FreeRTOS/Source/portable/MemMang/heap_4.c;Middlewares/Third_Party/FreeRTOS/Source/portable/GCC/ARM_CM4F/port.c;Src/system_stm32l4xx.c;Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_adc.c;Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_adc_ex.c;Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal.c;Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_i2c.c;Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_i2c_ex.c;Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_rcc.c;Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_rcc_ex.c;Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_flash.c;Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_flash_ex.c;Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_flash_ramfunc.c;Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_gpio.c;Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_dma.c;Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_dma_ex.c;Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_pwr.c;Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_pwr_ex.c;Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_cortex.c;Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_exti.c;Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_crc.c;Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_crc_ex.c;Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_dac.c;Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_dac_ex.c;Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_opamp.c;Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_opamp_ex.c;Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_rng.c;Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_rtc.c;Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_rtc_ex.c;Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_tim.c;Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_tim_ex.c;Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_uart.c;Drivers/STM32L4xx_HAL_Driver/Src/stm32l4xx_hal_uart_ex.c;Middlewares/Third_Party/FreeRTOS/Source/croutine.c;Middlewares/Third_Party/FreeRTOS/Source/event_groups.c;Middlewares/Third_Party/FreeRTOS/Source/list.c;Middlewares/Third_Party/FreeRTOS/Source/queue.c;Middlewares/Third_Party/FreeRTOS/Source/stream_buffer.c;Middlewares/Third_Party/FreeRTOS/Source/tasks.c;Middlewares/Third_Party/FreeRTOS/Source/timers.c;Middlewares/Third_Party/FreeRTOS/Source/CMSIS_RTOS/cmsis_os.c;Middlewares/Third_Party/FreeRTOS/Source/portable/MemMang/heap_4.c;Middlewares/Third_Party/FreeRTOS/Source/portable/GCC/ARM_CM4F/port.c;Src/system_stm32l4xx.c;Drivers/CMSIS/Device/ST/STM32L4xx/Source/Templates/system_stm32l4xx.c;;Middlewares/Third_Party/FreeRTOS/Source/croutine.c;Middlewares/Third_Party/FreeRTOS/Source/event_groups.c;Middlewares/Third_Party/FreeRTOS/Source/list.c;Middlewares/Third_Party/FreeRTOS/Source/queue.c;Middlewares/Third_Party/FreeRTOS/Source/stream_buffer.c;Middlewares/Third_Party/FreeRTOS/Source/tasks.c;Middlewares/Third_Party/FreeRTOS/Source/timers.c;Middlewares/Third_Party/FreeRTOS/Source/CMSIS_RTOS/cmsis_os.c;Middlewares/Third_Party/FreeRTOS/Source/portable/MemMang/heap_4.c;Middlewares/Third_Party/FreeRTOS/Source/portable/GCC/ARM_CM4F/port.c;
+HeaderPath=Drivers/STM32L4xx_HAL_Driver/Inc;Drivers/STM32L4xx_HAL_Driver/Inc/Legacy;Middlewares/Third_Party/FreeRTOS/Source/include;Middlewares/Third_Party/FreeRTOS/Source/CMSIS_RTOS;Middlewares/Third_Party/FreeRTOS/Source/portable/GCC/ARM_CM4F;Drivers/CMSIS/Device/ST/STM32L4xx/Include;Drivers/CMSIS/Include;Inc;
+CDefines=USE_HAL_DRIVER;STM32L432xx;USE_HAL_DRIVER;USE_HAL_DRIVER;
 
diff --git a/Inc/FreeRTOSConfig.h b/Inc/FreeRTOSConfig.h
index 53245a2..2bb57b7 100644
--- a/Inc/FreeRTOSConfig.h
+++ b/Inc/FreeRTOSConfig.h
@@ -59,14 +59,14 @@
 #define configTICK_RATE_HZ                       ((TickType_t)1000)
 #define configMAX_PRIORITIES                     ( 7 )
 #define configMINIMAL_STACK_SIZE                 ((uint16_t)128)
-#define configTOTAL_HEAP_SIZE                    ((size_t)4096)
+#define configTOTAL_HEAP_SIZE                    ((size_t)3072)
 #define configMAX_TASK_NAME_LEN                  ( 16 )
 #define configUSE_16_BIT_TICKS                   0
 #define configUSE_MUTEXES                        1
 #define configQUEUE_REGISTRY_SIZE                8
-#define configCHECK_FOR_STACK_OVERFLOW           2
+#define configCHECK_FOR_STACK_OVERFLOW           1
 #define configUSE_PORT_OPTIMISED_TASK_SELECTION  1
-#define configUSE_TICKLESS_IDLE                  1
+#define configUSE_TICKLESS_IDLE                  0
 
 /* Co-routine definitions. */
 #define configUSE_CO_ROUTINES                    0
diff --git a/STM32L432KC_FLASH.ld b/STM32L432KC_FLASH.ld
index e5a5414..db05234 100644
--- a/STM32L432KC_FLASH.ld
+++ b/STM32L432KC_FLASH.ld
@@ -4,7 +4,7 @@ ENTRY(Reset_Handler)
 /* Highest address of the user mode stack */
 _estack = 0x2000C000;    /* end of RAM */
 /* Generate a link error if heap and stack don't fit into RAM */
-_Min_Heap_Size = 0x1000;      /* required amount of heap  */
+_Min_Heap_Size = 0x400;      /* required amount of heap  */
 _Min_Stack_Size = 0x400; /* required amount of stack */
 
 /* Specify the memory areas */
diff --git a/Src/arm_fir_interpolate_f32.c b/Src/arm_fir_interpolate_f32.c
new file mode 100644
index 0000000..1ff72f8
--- /dev/null
+++ b/Src/arm_fir_interpolate_f32.c
@@ -0,0 +1,581 @@
+/* ----------------------------------------------------------------------    
+* Copyright (C) 2010-2014 ARM Limited. All rights reserved.    
+*    
+* $Date:        19. March 2015
+* $Revision: 	V.1.4.5
+*    
+* Project: 	    CMSIS DSP Library    
+* Title:	    arm_fir_interpolate_f32.c    
+*    
+* Description:	FIR interpolation for floating-point sequences.    
+*    
+* Target Processor: Cortex-M4/Cortex-M3/Cortex-M0
+*  
+* Redistribution and use in source and binary forms, with or without 
+* modification, are permitted provided that the following conditions
+* are met:
+*   - Redistributions of source code must retain the above copyright
+*     notice, this list of conditions and the following disclaimer.
+*   - Redistributions in binary form must reproduce the above copyright
+*     notice, this list of conditions and the following disclaimer in
+*     the documentation and/or other materials provided with the 
+*     distribution.
+*   - Neither the name of ARM LIMITED nor the names of its contributors
+*     may be used to endorse or promote products derived from this
+*     software without specific prior written permission.
+*
+* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 
+* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+* POSSIBILITY OF SUCH DAMAGE.   
+* -------------------------------------------------------------------- */
+
+#include "arm_math.h"
+
+/**    
+ * @defgroup FIR_Interpolate Finite Impulse Response (FIR) Interpolator    
+ *    
+ * These functions combine an upsampler (zero stuffer) and an FIR filter.    
+ * They are used in multirate systems for increasing the sample rate of a signal without introducing high frequency images.    
+ * Conceptually, the functions are equivalent to the block diagram below:    
+ * \image html FIRInterpolator.gif "Components included in the FIR Interpolator functions"    
+ * After upsampling by a factor of <code>L</code>, the signal should be filtered by a lowpass filter with a normalized    
+ * cutoff frequency of <code>1/L</code> in order to eliminate high frequency copies of the spectrum.    
+ * The user of the function is responsible for providing the filter coefficients.    
+ *    
+ * The FIR interpolator functions provided in the CMSIS DSP Library combine the upsampler and FIR filter in an efficient manner.    
+ * The upsampler inserts <code>L-1</code> zeros between each sample.    
+ * Instead of multiplying by these zero values, the FIR filter is designed to skip them.    
+ * This leads to an efficient implementation without any wasted effort.    
+ * The functions operate on blocks of input and output data.    
+ * <code>pSrc</code> points to an array of <code>blockSize</code> input values and    
+ * <code>pDst</code> points to an array of <code>blockSize*L</code> output values.    
+ *    
+ * The library provides separate functions for Q15, Q31, and floating-point data types.    
+ *    
+ * \par Algorithm:    
+ * The functions use a polyphase filter structure:    
+ * <pre>    
+ *    y[n] = b[0] * x[n] + b[L]   * x[n-1] + ... + b[L*(phaseLength-1)] * x[n-phaseLength+1]    
+ *    y[n+1] = b[1] * x[n] + b[L+1] * x[n-1] + ... + b[L*(phaseLength-1)+1] * x[n-phaseLength+1]    
+ *    ...    
+ *    y[n+(L-1)] = b[L-1] * x[n] + b[2*L-1] * x[n-1] + ....+ b[L*(phaseLength-1)+(L-1)] * x[n-phaseLength+1]    
+ * </pre>    
+ * This approach is more efficient than straightforward upsample-then-filter algorithms.    
+ * With this method the computation is reduced by a factor of <code>1/L</code> when compared to using a standard FIR filter.    
+ * \par    
+ * <code>pCoeffs</code> points to a coefficient array of size <code>numTaps</code>.    
+ * <code>numTaps</code> must be a multiple of the interpolation factor <code>L</code> and this is checked by the    
+ * initialization functions.    
+ * Internally, the function divides the FIR filter's impulse response into shorter filters of length    
+ * <code>phaseLength=numTaps/L</code>.    
+ * Coefficients are stored in time reversed order.    
+ * \par    
+ * <pre>    
+ *    {b[numTaps-1], b[numTaps-2], b[N-2], ..., b[1], b[0]}    
+ * </pre>    
+ * \par    
+ * <code>pState</code> points to a state array of size <code>blockSize + phaseLength - 1</code>.    
+ * Samples in the state buffer are stored in the order:    
+ * \par    
+ * <pre>    
+ *    {x[n-phaseLength+1], x[n-phaseLength], x[n-phaseLength-1], x[n-phaseLength-2]....x[0], x[1], ..., x[blockSize-1]}    
+ * </pre>    
+ * The state variables are updated after each block of data is processed, the coefficients are untouched.    
+ *    
+ * \par Instance Structure    
+ * The coefficients and state variables for a filter are stored together in an instance data structure.    
+ * A separate instance structure must be defined for each filter.    
+ * Coefficient arrays may be shared among several instances while state variable array should be allocated separately.    
+ * There are separate instance structure declarations for each of the 3 supported data types.    
+ *    
+ * \par Initialization Functions    
+ * There is also an associated initialization function for each data type.    
+ * The initialization function performs the following operations:    
+ * - Sets the values of the internal structure fields.    
+ * - Zeros out the values in the state buffer.    
+ * - Checks to make sure that the length of the filter is a multiple of the interpolation factor.    
+ * To do this manually without calling the init function, assign the follow subfields of the instance structure:
+ * L (interpolation factor), pCoeffs, phaseLength (numTaps / L), pState. Also set all of the values in pState to zero. 
+ *    
+ * \par    
+ * Use of the initialization function is optional.    
+ * However, if the initialization function is used, then the instance structure cannot be placed into a const data section.    
+ * To place an instance structure into a const data section, the instance structure must be manually initialized.    
+ * The code below statically initializes each of the 3 different data type filter instance structures    
+ * <pre>    
+ * arm_fir_interpolate_instance_f32 S = {L, phaseLength, pCoeffs, pState};    
+ * arm_fir_interpolate_instance_q31 S = {L, phaseLength, pCoeffs, pState};    
+ * arm_fir_interpolate_instance_q15 S = {L, phaseLength, pCoeffs, pState};    
+ * </pre>    
+ * where <code>L</code> is the interpolation factor; <code>phaseLength=numTaps/L</code> is the    
+ * length of each of the shorter FIR filters used internally,    
+ * <code>pCoeffs</code> is the address of the coefficient buffer;    
+ * <code>pState</code> is the address of the state buffer.    
+ * Be sure to set the values in the state buffer to zeros when doing static initialization.    
+ *    
+ * \par Fixed-Point Behavior    
+ * Care must be taken when using the fixed-point versions of the FIR interpolate filter functions.    
+ * In particular, the overflow and saturation behavior of the accumulator used in each function must be considered.    
+ * Refer to the function specific documentation below for usage guidelines.    
+ */
+
+/**    
+ * @addtogroup FIR_Interpolate    
+ * @{    
+ */
+
+/**    
+ * @brief Processing function for the floating-point FIR interpolator.    
+ * @param[in] *S        points to an instance of the floating-point FIR interpolator structure.    
+ * @param[in] *pSrc     points to the block of input data.    
+ * @param[out] *pDst    points to the block of output data.    
+ * @param[in] blockSize number of input samples to process per call.    
+ * @return none.    
+ */
+#ifndef ARM_MATH_CM0_FAMILY
+
+  /* Run the below code for Cortex-M4 and Cortex-M3 */
+
+void arm_fir_interpolate_f32(
+  const arm_fir_interpolate_instance_f32 * S,
+  float32_t * pSrc,
+  float32_t * pDst,
+  uint32_t blockSize)
+{
+  float32_t *pState = S->pState;                 /* State pointer */
+  float32_t *pCoeffs = S->pCoeffs;               /* Coefficient pointer */
+  float32_t *pStateCurnt;                        /* Points to the current sample of the state */
+  float32_t *ptr1, *ptr2;                        /* Temporary pointers for state and coefficient buffers */
+  float32_t sum0;                                /* Accumulators */
+  float32_t x0, c0;                              /* Temporary variables to hold state and coefficient values */
+  uint32_t i, blkCnt, j;                         /* Loop counters */
+  uint16_t phaseLen = S->phaseLength, tapCnt;    /* Length of each polyphase filter component */
+  float32_t acc0, acc1, acc2, acc3;
+  float32_t x1, x2, x3;
+  uint32_t blkCntN4;
+  float32_t c1, c2, c3;
+
+  /* S->pState buffer contains previous frame (phaseLen - 1) samples */
+  /* pStateCurnt points to the location where the new input data should be written */
+  pStateCurnt = S->pState + (phaseLen - 1u);
+
+  /* Initialise  blkCnt */
+  blkCnt = blockSize / 4;
+  blkCntN4 = blockSize - (4 * blkCnt);
+
+  /* Samples loop unrolled by 4 */
+  while(blkCnt > 0u)
+  {
+    /* Copy new input sample into the state buffer */
+    *pStateCurnt++ = *pSrc++;
+    *pStateCurnt++ = *pSrc++;
+    *pStateCurnt++ = *pSrc++;
+    *pStateCurnt++ = *pSrc++;
+
+    /* Address modifier index of coefficient buffer */
+    j = 1u;
+
+    /* Loop over the Interpolation factor. */
+    i = (S->L);
+
+    while(i > 0u)
+    {
+      /* Set accumulator to zero */
+      acc0 = 0.0f;
+      acc1 = 0.0f;
+      acc2 = 0.0f;
+      acc3 = 0.0f;
+
+      /* Initialize state pointer */
+      ptr1 = pState;
+
+      /* Initialize coefficient pointer */
+      ptr2 = pCoeffs + (S->L - j);
+
+      /* Loop over the polyPhase length. Unroll by a factor of 4.        
+       ** Repeat until we've computed numTaps-(4*S->L) coefficients. */
+      tapCnt = phaseLen >> 2u;
+
+      x0 = *(ptr1++);
+      x1 = *(ptr1++);
+      x2 = *(ptr1++);
+
+      while(tapCnt > 0u)
+      {
+
+        /* Read the input sample */
+        x3 = *(ptr1++);
+
+        /* Read the coefficient */
+        c0 = *(ptr2);
+
+        /* Perform the multiply-accumulate */
+        acc0 += x0 * c0;
+        acc1 += x1 * c0;
+        acc2 += x2 * c0;
+        acc3 += x3 * c0;
+
+        /* Read the coefficient */
+        c1 = *(ptr2 + S->L);
+
+        /* Read the input sample */
+        x0 = *(ptr1++);
+
+        /* Perform the multiply-accumulate */
+        acc0 += x1 * c1;
+        acc1 += x2 * c1;
+        acc2 += x3 * c1;
+        acc3 += x0 * c1;
+
+        /* Read the coefficient */
+        c2 = *(ptr2 + S->L * 2);
+
+        /* Read the input sample */
+        x1 = *(ptr1++);
+
+        /* Perform the multiply-accumulate */
+        acc0 += x2 * c2;
+        acc1 += x3 * c2;
+        acc2 += x0 * c2;
+        acc3 += x1 * c2;
+
+        /* Read the coefficient */
+        c3 = *(ptr2 + S->L * 3);
+
+        /* Read the input sample */
+        x2 = *(ptr1++);
+
+        /* Perform the multiply-accumulate */
+        acc0 += x3 * c3;
+        acc1 += x0 * c3;
+        acc2 += x1 * c3;
+        acc3 += x2 * c3;
+
+
+        /* Upsampling is done by stuffing L-1 zeros between each sample.        
+         * So instead of multiplying zeros with coefficients,        
+         * Increment the coefficient pointer by interpolation factor times. */
+        ptr2 += 4 * S->L;
+
+        /* Decrement the loop counter */
+        tapCnt--;
+      }
+
+      /* If the polyPhase length is not a multiple of 4, compute the remaining filter taps */
+      tapCnt = phaseLen % 0x4u;
+
+      while(tapCnt > 0u)
+      {
+
+        /* Read the input sample */
+        x3 = *(ptr1++);
+
+        /* Read the coefficient */
+        c0 = *(ptr2);
+
+        /* Perform the multiply-accumulate */
+        acc0 += x0 * c0;
+        acc1 += x1 * c0;
+        acc2 += x2 * c0;
+        acc3 += x3 * c0;
+
+        /* Increment the coefficient pointer by interpolation factor times. */
+        ptr2 += S->L;
+
+        /* update states for next sample processing */
+        x0 = x1;
+        x1 = x2;
+        x2 = x3;
+
+        /* Decrement the loop counter */
+        tapCnt--;
+      }
+
+      /* The result is in the accumulator, store in the destination buffer. */
+      *pDst = acc0;
+      *(pDst + S->L) = acc1;
+      *(pDst + 2 * S->L) = acc2;
+      *(pDst + 3 * S->L) = acc3;
+
+      pDst++;
+
+      /* Increment the address modifier index of coefficient buffer */
+      j++;
+
+      /* Decrement the loop counter */
+      i--;
+    }
+
+    /* Advance the state pointer by 1        
+     * to process the next group of interpolation factor number samples */
+    pState = pState + 4;
+
+    pDst += S->L * 3;
+
+    /* Decrement the loop counter */
+    blkCnt--;
+  }
+
+  /* If the blockSize is not a multiple of 4, compute any remaining output samples here.        
+   ** No loop unrolling is used. */
+
+  while(blkCntN4 > 0u)
+  {
+    /* Copy new input sample into the state buffer */
+    *pStateCurnt++ = *pSrc++;
+
+    /* Address modifier index of coefficient buffer */
+    j = 1u;
+
+    /* Loop over the Interpolation factor. */
+    i = S->L;
+    while(i > 0u)
+    {
+      /* Set accumulator to zero */
+      sum0 = 0.0f;
+
+      /* Initialize state pointer */
+      ptr1 = pState;
+
+      /* Initialize coefficient pointer */
+      ptr2 = pCoeffs + (S->L - j);
+
+      /* Loop over the polyPhase length. Unroll by a factor of 4.        
+       ** Repeat until we've computed numTaps-(4*S->L) coefficients. */
+      tapCnt = phaseLen >> 2u;
+      while(tapCnt > 0u)
+      {
+
+        /* Read the coefficient */
+        c0 = *(ptr2);
+
+        /* Upsampling is done by stuffing L-1 zeros between each sample.        
+         * So instead of multiplying zeros with coefficients,        
+         * Increment the coefficient pointer by interpolation factor times. */
+        ptr2 += S->L;
+
+        /* Read the input sample */
+        x0 = *(ptr1++);
+
+        /* Perform the multiply-accumulate */
+        sum0 += x0 * c0;
+
+        /* Read the coefficient */
+        c0 = *(ptr2);
+
+        /* Increment the coefficient pointer by interpolation factor times. */
+        ptr2 += S->L;
+
+        /* Read the input sample */
+        x0 = *(ptr1++);
+
+        /* Perform the multiply-accumulate */
+        sum0 += x0 * c0;
+
+        /* Read the coefficient */
+        c0 = *(ptr2);
+
+        /* Increment the coefficient pointer by interpolation factor times. */
+        ptr2 += S->L;
+
+        /* Read the input sample */
+        x0 = *(ptr1++);
+
+        /* Perform the multiply-accumulate */
+        sum0 += x0 * c0;
+
+        /* Read the coefficient */
+        c0 = *(ptr2);
+
+        /* Increment the coefficient pointer by interpolation factor times. */
+        ptr2 += S->L;
+
+        /* Read the input sample */
+        x0 = *(ptr1++);
+
+        /* Perform the multiply-accumulate */
+        sum0 += x0 * c0;
+
+        /* Decrement the loop counter */
+        tapCnt--;
+      }
+
+      /* If the polyPhase length is not a multiple of 4, compute the remaining filter taps */
+      tapCnt = phaseLen % 0x4u;
+
+      while(tapCnt > 0u)
+      {
+        /* Perform the multiply-accumulate */
+        sum0 += *(ptr1++) * (*ptr2);
+
+        /* Increment the coefficient pointer by interpolation factor times. */
+        ptr2 += S->L;
+
+        /* Decrement the loop counter */
+        tapCnt--;
+      }
+
+      /* The result is in the accumulator, store in the destination buffer. */
+      *pDst++ = sum0;
+
+      /* Increment the address modifier index of coefficient buffer */
+      j++;
+
+      /* Decrement the loop counter */
+      i--;
+    }
+
+    /* Advance the state pointer by 1        
+     * to process the next group of interpolation factor number samples */
+    pState = pState + 1;
+
+    /* Decrement the loop counter */
+    blkCntN4--;
+  }
+
+  /* Processing is complete.        
+   ** Now copy the last phaseLen - 1 samples to the satrt of the state buffer.        
+   ** This prepares the state buffer for the next function call. */
+
+  /* Points to the start of the state buffer */
+  pStateCurnt = S->pState;
+
+  tapCnt = (phaseLen - 1u) >> 2u;
+
+  /* copy data */
+  while(tapCnt > 0u)
+  {
+    *pStateCurnt++ = *pState++;
+    *pStateCurnt++ = *pState++;
+    *pStateCurnt++ = *pState++;
+    *pStateCurnt++ = *pState++;
+
+    /* Decrement the loop counter */
+    tapCnt--;
+  }
+
+  tapCnt = (phaseLen - 1u) % 0x04u;
+
+  /* copy data */
+  while(tapCnt > 0u)
+  {
+    *pStateCurnt++ = *pState++;
+
+    /* Decrement the loop counter */
+    tapCnt--;
+  }
+}
+
+#else
+
+  /* Run the below code for Cortex-M0 */
+
+void arm_fir_interpolate_f32(
+  const arm_fir_interpolate_instance_f32 * S,
+  float32_t * pSrc,
+  float32_t * pDst,
+  uint32_t blockSize)
+{
+  float32_t *pState = S->pState;                 /* State pointer */
+  float32_t *pCoeffs = S->pCoeffs;               /* Coefficient pointer */
+  float32_t *pStateCurnt;                        /* Points to the current sample of the state */
+  float32_t *ptr1, *ptr2;                        /* Temporary pointers for state and coefficient buffers */
+
+
+  float32_t sum;                                 /* Accumulator */
+  uint32_t i, blkCnt;                            /* Loop counters */
+  uint16_t phaseLen = S->phaseLength, tapCnt;    /* Length of each polyphase filter component */
+
+
+  /* S->pState buffer contains previous frame (phaseLen - 1) samples */
+  /* pStateCurnt points to the location where the new input data should be written */
+  pStateCurnt = S->pState + (phaseLen - 1u);
+
+  /* Total number of intput samples */
+  blkCnt = blockSize;
+
+  /* Loop over the blockSize. */
+  while(blkCnt > 0u)
+  {
+    /* Copy new input sample into the state buffer */
+    *pStateCurnt++ = *pSrc++;
+
+    /* Loop over the Interpolation factor. */
+    i = S->L;
+
+    while(i > 0u)
+    {
+      /* Set accumulator to zero */
+      sum = 0.0f;
+
+      /* Initialize state pointer */
+      ptr1 = pState;
+
+      /* Initialize coefficient pointer */
+      ptr2 = pCoeffs + (i - 1u);
+
+      /* Loop over the polyPhase length */
+      tapCnt = phaseLen;
+
+      while(tapCnt > 0u)
+      {
+        /* Perform the multiply-accumulate */
+        sum += *ptr1++ * *ptr2;
+
+        /* Increment the coefficient pointer by interpolation factor times. */
+        ptr2 += S->L;
+
+        /* Decrement the loop counter */
+        tapCnt--;
+      }
+
+      /* The result is in the accumulator, store in the destination buffer. */
+      *pDst++ = sum;
+
+      /* Decrement the loop counter */
+      i--;
+    }
+
+    /* Advance the state pointer by 1           
+     * to process the next group of interpolation factor number samples */
+    pState = pState + 1;
+
+    /* Decrement the loop counter */
+    blkCnt--;
+  }
+
+  /* Processing is complete.         
+   ** Now copy the last phaseLen - 1 samples to the start of the state buffer.       
+   ** This prepares the state buffer for the next function call. */
+
+  /* Points to the start of the state buffer */
+  pStateCurnt = S->pState;
+
+  tapCnt = phaseLen - 1u;
+
+  while(tapCnt > 0u)
+  {
+    *pStateCurnt++ = *pState++;
+
+    /* Decrement the loop counter */
+    tapCnt--;
+  }
+
+}
+
+#endif /*   #ifndef ARM_MATH_CM0_FAMILY */
+
+
+
+ /**    
+  * @} end of FIR_Interpolate group    
+  */
diff --git a/Src/arm_fir_interpolate_init_f32.c b/Src/arm_fir_interpolate_init_f32.c
new file mode 100644
index 0000000..d8c8bdc
--- /dev/null
+++ b/Src/arm_fir_interpolate_init_f32.c
@@ -0,0 +1,121 @@
+/*-----------------------------------------------------------------------------    
+* Copyright (C) 2010-2014 ARM Limited. All rights reserved.    
+*    
+* $Date:        19. March 2015
+* $Revision: 	V.1.4.5
+*    
+* Project: 	    CMSIS DSP Library    
+* Title:        arm_fir_interpolate_init_f32.c    
+*    
+* Description:  Floating-point FIR interpolator initialization function    
+*    
+* Target Processor: Cortex-M4/Cortex-M3/Cortex-M0
+*  
+* Redistribution and use in source and binary forms, with or without 
+* modification, are permitted provided that the following conditions
+* are met:
+*   - Redistributions of source code must retain the above copyright
+*     notice, this list of conditions and the following disclaimer.
+*   - Redistributions in binary form must reproduce the above copyright
+*     notice, this list of conditions and the following disclaimer in
+*     the documentation and/or other materials provided with the 
+*     distribution.
+*   - Neither the name of ARM LIMITED nor the names of its contributors
+*     may be used to endorse or promote products derived from this
+*     software without specific prior written permission.
+*
+* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 
+* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+* POSSIBILITY OF SUCH DAMAGE.   
+* ---------------------------------------------------------------------------*/
+
+#include "arm_math.h"
+
+/**    
+ * @ingroup groupFilters    
+ */
+
+/**    
+ * @addtogroup FIR_Interpolate    
+ * @{    
+ */
+
+/**    
+ * @brief  Initialization function for the floating-point FIR interpolator.    
+ * @param[in,out] *S        points to an instance of the floating-point FIR interpolator structure.    
+ * @param[in]     L         upsample factor.    
+ * @param[in]     numTaps   number of filter coefficients in the filter.    
+ * @param[in]     *pCoeffs  points to the filter coefficient buffer.    
+ * @param[in]     *pState   points to the state buffer.    
+ * @param[in]     blockSize number of input samples to process per call.    
+ * @return        The function returns ARM_MATH_SUCCESS if initialization was successful or ARM_MATH_LENGTH_ERROR if    
+ * the filter length <code>numTaps</code> is not a multiple of the interpolation factor <code>L</code>.    
+ *    
+ * <b>Description:</b>    
+ * \par    
+ * <code>pCoeffs</code> points to the array of filter coefficients stored in time reversed order:    
+ * <pre>    
+ *    {b[numTaps-1], b[numTaps-2], b[numTaps-2], ..., b[1], b[0]}    
+ * </pre>    
+ * The length of the filter <code>numTaps</code> must be a multiple of the interpolation factor <code>L</code>.    
+ * \par    
+ * <code>pState</code> points to the array of state variables.    
+ * <code>pState</code> is of length <code>(numTaps/L)+blockSize-1</code> words    
+ * where <code>blockSize</code> is the number of input samples processed by each call to <code>arm_fir_interpolate_f32()</code>.    
+ */
+
+arm_status arm_fir_interpolate_init_f32(
+  arm_fir_interpolate_instance_f32 * S,
+  uint8_t L,
+  uint16_t numTaps,
+  float32_t * pCoeffs,
+  float32_t * pState,
+  uint32_t blockSize)
+{
+  arm_status status;
+
+  /* The filter length must be a multiple of the interpolation factor */
+  if((numTaps % L) != 0u)
+  {
+    /* Set status as ARM_MATH_LENGTH_ERROR */
+    status = ARM_MATH_LENGTH_ERROR;
+  }
+  else
+  {
+
+    /* Assign coefficient pointer */
+    S->pCoeffs = pCoeffs;
+
+    /* Assign Interpolation factor */
+    S->L = L;
+
+    /* Assign polyPhaseLength */
+    S->phaseLength = numTaps / L;
+
+    /* Clear state buffer and size of state array is always phaseLength + blockSize - 1 */
+    memset(pState, 0,
+           (blockSize +
+            ((uint32_t) S->phaseLength - 1u)) * sizeof(float32_t));
+
+    /* Assign state pointer */
+    S->pState = pState;
+
+    status = ARM_MATH_SUCCESS;
+  }
+
+  return (status);
+
+}
+
+ /**    
+  * @} end of FIR_Interpolate group    
+  */
diff --git a/Src/main.c b/Src/main.c
index 4668a5e..7cc74df 100644
--- a/Src/main.c
+++ b/Src/main.c
@@ -90,7 +90,7 @@ osThreadId ioEventTaskHandle;
 uint32_t ioEventTaskBuffer[ 384 ];
 osStaticThreadDef_t ioEventTaskControlBlock;
 osThreadId audioInputTaskHandle;
-uint32_t audioInputTaskBuffer[ 640 ];
+uint32_t audioInputTaskBuffer[ 512 ];
 osStaticThreadDef_t audioInputTaskControlBlock;
 osThreadId modulatorTaskHandle;
 uint32_t modulatorTaskBuffer[ 384 ];
@@ -268,7 +268,7 @@ int main(void)
   ioEventTaskHandle = osThreadCreate(osThread(ioEventTask), NULL);
 
   /* definition and creation of audioInputTask */
-  osThreadStaticDef(audioInputTask, startAudioInputTask, osPriorityAboveNormal, 0, 640, audioInputTaskBuffer, &audioInputTaskControlBlock);
+  osThreadStaticDef(audioInputTask, startAudioInputTask, osPriorityAboveNormal, 0, 512, audioInputTaskBuffer, &audioInputTaskControlBlock);
   audioInputTaskHandle = osThreadCreate(osThread(audioInputTask), NULL);
 
   /* definition and creation of modulatorTask */
@@ -401,12 +401,12 @@ void SystemClock_Config(void)
   RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_LSE|RCC_OSCILLATORTYPE_MSI;
   RCC_OscInitStruct.LSEState = RCC_LSE_ON;
   RCC_OscInitStruct.MSIState = RCC_MSI_ON;
-  RCC_OscInitStruct.MSICalibrationValue = 0;
-  RCC_OscInitStruct.MSIClockRange = RCC_MSIRANGE_6;
+  RCC_OscInitStruct.MSICalibrationValue = RCC_MSICALIBRATION_DEFAULT;
+  RCC_OscInitStruct.MSIClockRange = RCC_MSIRANGE_8;
   RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
   RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_MSI;
   RCC_OscInitStruct.PLL.PLLM = 1;
-  RCC_OscInitStruct.PLL.PLLN = 40;
+  RCC_OscInitStruct.PLL.PLLN = 10;
   RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV7;
   RCC_OscInitStruct.PLL.PLLQ = RCC_PLLQ_DIV2;
   RCC_OscInitStruct.PLL.PLLR = RCC_PLLR_DIV2;
@@ -439,10 +439,10 @@ void SystemClock_Config(void)
   PeriphClkInit.RngClockSelection = RCC_RNGCLKSOURCE_PLLSAI1;
   PeriphClkInit.PLLSAI1.PLLSAI1Source = RCC_PLLSOURCE_MSI;
   PeriphClkInit.PLLSAI1.PLLSAI1M = 1;
-  PeriphClkInit.PLLSAI1.PLLSAI1N = 24;
+  PeriphClkInit.PLLSAI1.PLLSAI1N = 12;
   PeriphClkInit.PLLSAI1.PLLSAI1P = RCC_PLLP_DIV7;
-  PeriphClkInit.PLLSAI1.PLLSAI1Q = RCC_PLLQ_DIV2;
-  PeriphClkInit.PLLSAI1.PLLSAI1R = RCC_PLLR_DIV2;
+  PeriphClkInit.PLLSAI1.PLLSAI1Q = RCC_PLLQ_DIV4;
+  PeriphClkInit.PLLSAI1.PLLSAI1R = RCC_PLLR_DIV4;
   PeriphClkInit.PLLSAI1.PLLSAI1ClockOut = RCC_PLLSAI1_48M2CLK|RCC_PLLSAI1_ADC1CLK;
   if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInit) != HAL_OK)
   {
@@ -878,19 +878,19 @@ static void MX_DMA_Init(void)
 
   /* DMA interrupt init */
   /* DMA1_Channel1_IRQn interrupt configuration */
-  HAL_NVIC_SetPriority(DMA1_Channel1_IRQn, 5, 0);
+  HAL_NVIC_SetPriority(DMA1_Channel1_IRQn, 5, 1);
   HAL_NVIC_EnableIRQ(DMA1_Channel1_IRQn);
   /* DMA1_Channel2_IRQn interrupt configuration */
-  HAL_NVIC_SetPriority(DMA1_Channel2_IRQn, 5, 0);
+  HAL_NVIC_SetPriority(DMA1_Channel2_IRQn, 7, 1);
   HAL_NVIC_EnableIRQ(DMA1_Channel2_IRQn);
   /* DMA1_Channel3_IRQn interrupt configuration */
-  HAL_NVIC_SetPriority(DMA1_Channel3_IRQn, 5, 0);
+  HAL_NVIC_SetPriority(DMA1_Channel3_IRQn, 6, 1);
   HAL_NVIC_EnableIRQ(DMA1_Channel3_IRQn);
   /* DMA1_Channel6_IRQn interrupt configuration */
-  HAL_NVIC_SetPriority(DMA1_Channel6_IRQn, 5, 0);
+  HAL_NVIC_SetPriority(DMA1_Channel6_IRQn, 7, 0);
   HAL_NVIC_EnableIRQ(DMA1_Channel6_IRQn);
   /* DMA1_Channel7_IRQn interrupt configuration */
-  HAL_NVIC_SetPriority(DMA1_Channel7_IRQn, 5, 0);
+  HAL_NVIC_SetPriority(DMA1_Channel7_IRQn, 6, 0);
   HAL_NVIC_EnableIRQ(DMA1_Channel7_IRQn);
   /* DMA2_Channel4_IRQn interrupt configuration */
   HAL_NVIC_SetPriority(DMA2_Channel4_IRQn, 5, 0);
@@ -1066,6 +1066,12 @@ void assert_failed(uint8_t* file, uint32_t line)
 }
 #endif /* USE_FULL_ASSERT */
 
+void vApplicationStackOverflowHook(TaskHandle_t xTask, signed char *pcTaskName)
+{
+    snprintf(error_message, sizeof(error_message), "stack overflow %s", pcTaskName);
+    while (1);
+}
+
 /**
   * @}
   */
diff --git a/TNC/AFSKTestTone.cpp b/TNC/AFSKTestTone.cpp
index 452c81d..3c4a90b 100644
--- a/TNC/AFSKTestTone.cpp
+++ b/TNC/AFSKTestTone.cpp
@@ -104,7 +104,7 @@ void AFSKTestTone::fill() const
     case AFSKTestTone::State::SPACE:
         if (kiss::settings().modem_type == kiss::Hardware::ModemType::M17)
         {
-            getModulator().send(0x5F);
+            getModulator().send(0x22);
         }
         else
         {
diff --git a/TNC/Golay24.h b/TNC/Golay24.h
index 59acbd2..8721ded 100644
--- a/TNC/Golay24.h
+++ b/TNC/Golay24.h
@@ -6,6 +6,7 @@
 #include <array>
 #include <algorithm>
 #include <utility>
+#include <cstdint>
 
 namespace mobilinkd {
 
diff --git a/TNC/HdlcFrame.cpp b/TNC/HdlcFrame.cpp
index a101a7c..084aeee 100644
--- a/TNC/HdlcFrame.cpp
+++ b/TNC/HdlcFrame.cpp
@@ -3,6 +3,7 @@
 
 #include "HdlcFrame.hpp"
 #include "Log.h"
+#include "main.h"
 #include "cmsis_os.h"
 
 namespace mobilinkd { namespace tnc { namespace hdlc {
diff --git a/TNC/IOEventTask.cpp b/TNC/IOEventTask.cpp
index 6dc9ef4..e9cf313 100644
--- a/TNC/IOEventTask.cpp
+++ b/TNC/IOEventTask.cpp
@@ -99,7 +99,7 @@ void startIOEventTask(void const*)
         {
             DEBUG("RF frame");
             frame->source(frame->source() & 0x70);
-            if (!ioport->write(frame, 100))
+            if (!ioport->write(frame, frame->size() + 100))
             {
                 ERROR("Timed out sending frame");
                 // The frame has been passed to the write() call.  It owns it now.
diff --git a/TNC/KissHardware.cpp b/TNC/KissHardware.cpp
index 418e6ee..aa8a4f9 100644
--- a/TNC/KissHardware.cpp
+++ b/TNC/KissHardware.cpp
@@ -13,7 +13,6 @@
 #include "KissHardware.h"
 #endif
 
-#include <memory>
 #include <array>
 #include <cstdio>
 #include <cstring>
@@ -44,10 +43,10 @@ int powerOffViaUSB(void)
 namespace mobilinkd { namespace tnc { namespace kiss {
 
 #ifdef NUCLEOTNC
-const char FIRMWARE_VERSION[] = "2.1.5";
+const char FIRMWARE_VERSION[] = "2.1.8";
 const char HARDWARE_VERSION[] = "Mobilinkd NucleoTNC";
 #else
-const char FIRMWARE_VERSION[] = "2.1.5";
+const char FIRMWARE_VERSION[] = "2.1.8";
 const char HARDWARE_VERSION[] = "Mobilinkd TNC3 2.1.1";
 #endif
 
@@ -502,7 +501,7 @@ void Hardware::handle_request(hdlc::IoFrame* frame)
 
     case hardware::SET_DATETIME:
         DEBUG("SET_DATETIME");
-        set_rtc_datetime(&*it);
+        set_rtc_datetime(static_cast<const uint8_t*>(&*it));
         [[fallthrough]];
     case hardware::GET_DATETIME:
         DEBUG("GET_DATETIME");
@@ -629,23 +628,22 @@ void Hardware::handle_ext_request(hdlc::IoFrame* frame) {
     }
 }
 
+Hardware tmpHardware;
+
 bool Hardware::load()
 {
     INFO("Loading settings from EEPROM");
 
-    auto tmp = std::make_unique<Hardware>();
+    memset(&tmpHardware, 0, sizeof(Hardware));
 
-    if (!tmp) return false;
-    memset(tmp.get(), 0, sizeof(Hardware));
-
-    if (!I2C_Storage::load(*tmp)) {
+    if (!I2C_Storage::load(tmpHardware)) {
         ERROR("EEPROM read failed");
         return false;
     }
 
-    if (tmp->crc_ok())
+    if (tmpHardware.crc_ok())
     {
-        memcpy(this, tmp.get(), sizeof(Hardware));
+        memcpy(this, &tmpHardware, sizeof(Hardware));
         return true;
     }
     ERROR("EEPROM CRC error");
diff --git a/TNC/KissHardware.hpp b/TNC/KissHardware.hpp
index ecd1800..22b2dbe 100644
--- a/TNC/KissHardware.hpp
+++ b/TNC/KissHardware.hpp
@@ -9,7 +9,6 @@
 
 #include <cstdint>
 #include <cstring>
-#include <memory>
 #include <array>
 
 extern "C" void updatePtt(void);
diff --git a/TNC/M17.cpp b/TNC/M17.cpp
index 1d33f4b..76d049e 100644
--- a/TNC/M17.cpp
+++ b/TNC/M17.cpp
@@ -12,7 +12,84 @@ const std::array<int16_t, FILTER_TAP_NUM> rrc_taps = {
     17634, 18510, 18510, 17634, 15966, 13661, 10930, 8014, 5155, 2569, 427,
     -1163, -2166, -2606, -2569, -2176, -1569, -886, -249, 253, 573, 698, 654,
     485, 253, 16, -176, -293, -321, -269, -158, -19, 114, 216, 269, 267, 215,
-    129, 29, -62, -130, -163};
+    129, 29, -62, -130, -163
+//    -151, -100, -18, 80, 175, 246, 275, 249, 170, 49,
+//    -90, -219, -304, -318, -245, -88, 131, 373, 581, 695,
+//    659, 437, 22, -556, -1229, -1890, -2409, -2641, -2452, -1738,
+//    -441, 1434, 3816, 6563, 9480, 12334, 14880, 16891, 18179, 18622,
+//    18179, 16891, 14880, 12334, 9480, 6563, 3816, 1434, -441, -1738,
+//    -2452, -2641, -2409, -1890, -1229, -556, 22, 437, 659, 695,
+//    581, 373, 131, -88, -245, -318, -304, -219, -90, 49,
+//    170, 249, 275, 246, 175, 80, -18, -100, -151, 0
+};
 
+const std::array<int16_t, FILTER_TAP_NUM_9> rrc_taps_9 = {
+    33, -29, -93, -143, -165, -151, -100, -18, 80, 175, 246, 275,
+    249, 170, 49, -90, -219, -304, -318, -245, -88, 131, 373, 581,
+    695, 659, 437, 22, -556, -1229, -1890, -2409, -2641, -2452,
+    -1738, -441, 1434, 3816, 6563, 9480, 12334, 14880, 16891, 18179,
+    18622, 18179, 16891, 14880, 12334, 9480, 6563, 3816, 1434, -441,
+    -1738, -2452, -2641, -2409, -1890, -1229, -556, 22, 437, 659, 695,
+    581, 373, 131, -88, -245, -318, -304, -219, -90, 49, 170, 249,
+    275, 246, 175, 80, -18, -100, -151, -165, -143, -93, -29, 33, 0
+};
+
+const std::array<int16_t, FILTER_TAP_NUM_11> rrc_taps_11 = {
+    -92, -100, -87, -55, -10, 38, 81, 106, 107, 81,
+    33, -29, -93, -143, -165, -151, -100, -18, 80, 175,
+    246, 275, 249, 170, 49, -90, -219, -304, -318, -245,
+    -88, 131, 373, 581, 695, 659, 437, 22, -556, -1229,
+    -1890, -2409, -2641, -2452, -1738, -441, 1434, 3816, 6563, 9480,
+    12334, 14880, 16891, 18179, 18622, 18179, 16891, 14880, 12334, 9480,
+    6563, 3816, 1434, -441, -1738, -2452, -2641, -2409, -1890, -1229,
+    -556, 22, 437, 659, 695, 581, 373, 131, -88, -245,
+    -318, -304, -219, -90, 49, 170, 249, 275, 246, 175,
+    80, -18, -100, -151, -165, -143, -93, -29, 33, 81,
+    107, 106, 81, 38, -10, -55, -87, -100, -92, 0
+};
+
+const std::array<int16_t, FILTER_TAP_NUM_15> rrc_taps_15 = {
+    48, 51, 44, 27, 3, -21, -41, -53, -53, -40,
+    -16, 12, 41, 63, 72, 66, 43, 9, -30, -67,
+    -92, -100, -87, -55, -10, 38, 81, 106, 107, 81,
+    33, -29, -93, -143, -165, -151, -100, -18, 80, 175,
+    246, 275, 249, 170, 49, -90, -219, -304, -318, -245,
+    -88, 131, 373, 581, 695, 659, 437, 22, -556, -1229,
+    -1890, -2409, -2641, -2452, -1738, -441, 1434, 3816, 6563, 9480,
+    12334, 14880, 16891, 18179, 18622, 18179, 16891, 14880, 12334, 9480,
+    6563, 3816, 1434, -441, -1738, -2452, -2641, -2409, -1890, -1229,
+    -556, 22, 437, 659, 695, 581, 373, 131, -88, -245,
+    -318, -304, -219, -90, 49, 170, 249, 275, 246, 175,
+    80, -18, -100, -151, -165, -143, -93, -29, 33, 81,
+    107, 106, 81, 38, -10, -55, -87, -100, -92, -67,
+    -30, 9, 43, 66, 72, 63, 41, 12, -16, -40,
+    -53, -53, -41, -21, 3, 27, 44, 51, 48, 0
+};
+
+const std::array<int16_t, FILTER_TAP_NUM_21> rrc_taps_21 = {
+    -1, 1, 3, 5, 6, 5, 3, 0, -2, -5, -7, -7, -6, -4, 0, 3, 6, 8,
+    7, 6, 2, -1, -5, -8, -10, -9, -6, -1, 3, 8, 12, 12, 11, 6, 0,
+    -5, -10, -13, -13, -10, -4, 3, 10, 15, 18, 16, 10, 2, -7, -16,
+    -23, -25, -21, -13, -2, 9, 20, 26, 26, 20, 8, -7, -23, -35, -41,
+    -37, -25, -4, 20, 43, 61, 68, 62, 42, 12, -22, -54, -76, -79,
+    -61, -22, 32, 93, 145, 173, 164, 109, 5, -139, -307, -472, -602,
+    -660, -613, -434, -110, 358, 954, 1640, 2370, 3083, 3720, 4222,
+    4544, 4655, 4544, 4222, 3720, 3083, 2370, 1640, 954, 358, -110,
+    -434, -613, -660, -602, -472, -307, -139, 5, 109, 164, 173, 145,
+    93, 32, -22, -61, -79, -76, -54, -22, 12, 42, 62, 68, 61, 43, 20,
+    -4, -25, -37, -41, -35, -23, -7, 8, 20, 26, 26, 20, 9, -2, -13,
+    -21, -25, -23, -16, -7, 2, 10, 16, 18, 15, 10, 3, -4, -10, -13,
+    -13, -10, -5, 0, 6, 11, 12, 12, 8, 3, -1, -6, -9, -10, -8, -5,
+    -1, 2, 6, 7, 8, 6, 3, 0, -4, -6, -7, -7, -5, -2, 0, 3, 5, 6, 5,
+    3, 1, -1, 0
+};
+
+const std::array<float, FILTER_TAP_NUM_9> rrc_taps_f9 = {
+    0.002017321931508163, -0.0018256054303579805, -0.00571615173291049, -0.008746639552588416, -0.010105075751866371, -0.009265784007800534, -0.006136551625729697, -0.001125978562075172, 0.004891777252042491, 0.01071805138282269, 0.01505751553351295, 0.01679337935001369, 0.015256245142156299, 0.01042830577908502, 0.003031522725559901, -0.0055333532968188165, -0.013403099825723372, -0.018598682349642525, -0.01944761739590459, -0.015005271935951746, -0.0053887880354343935, 0.008056525910253532, 0.022816244158307273, 0.035513467692208076, 0.04244131815783876, 0.04025481153629372, 0.02671818654865632, 0.0013810216516704976, -0.03394615682795165, -0.07502635967975885, -0.11540977897637611, -0.14703962203941534, -0.16119995609538576, -0.14969512896336504, -0.10610329539459686, -0.026921412469634916, 0.08757875030779196, 0.23293327870303457, 0.4006012210123992, 0.5786324696325503, 0.7528286479934068, 0.908262741447522, 1.0309661131633199, 1.1095611856548013, 1.1366197723675815, 1.1095611856548013, 1.0309661131633199, 0.908262741447522, 0.7528286479934068, 0.5786324696325503, 0.4006012210123992, 0.23293327870303457, 0.08757875030779196, -0.026921412469634916, -0.10610329539459686, -0.14969512896336504, -0.16119995609538576, -0.14703962203941534, -0.11540977897637611, -0.07502635967975885, -0.03394615682795165, 0.0013810216516704976, 0.02671818654865632, 0.04025481153629372, 0.04244131815783876, 0.035513467692208076, 0.022816244158307273, 0.008056525910253532, -0.0053887880354343935, -0.015005271935951746, -0.01944761739590459, -0.018598682349642525, -0.013403099825723372, -0.0055333532968188165, 0.003031522725559901, 0.01042830577908502, 0.015256245142156299, 0.01679337935001369, 0.01505751553351295, 0.01071805138282269, 0.004891777252042491, -0.001125978562075172, -0.006136551625729697, -0.009265784007800534, -0.010105075751866371, -0.008746639552588416, -0.00571615173291049, -0.0018256054303579805, 0.002017321931508163, 0.0
+};
+
+const std::array<float, FILTER_TAP_NUM_15> rrc_taps_f15 = {
+    0.0029364388513841593, 0.0031468394550958484, 0.002699564567597445, 0.001661182944400927, 0.00023319405581230247, -0.0012851320781224025, -0.0025577136087664687, -0.0032843366522956313, -0.0032697038088887226, -0.0024733964729590865, -0.0010285696910973807, 0.0007766690889758685, 0.002553421969211845, 0.0038920145144327816, 0.004451886520053017, 0.00404219185231544, 0.002674727068399207, 0.0005756567993179152, -0.0018493784971116507, -0.004092346891623224, -0.005648131453822014, -0.006126925416243605, -0.005349511529163396, -0.003403189203405097, -0.0006430502751187517, 0.002365929161655135, 0.004957956568090113, 0.006506845894531803, 0.006569574194782443, 0.0050017573119839134, 0.002017321931508163, -0.0018256054303579805, -0.00571615173291049, -0.008746639552588416, -0.010105075751866371, -0.009265784007800534, -0.006136551625729697, -0.001125978562075172, 0.004891777252042491, 0.01071805138282269, 0.01505751553351295, 0.01679337935001369, 0.015256245142156299, 0.01042830577908502, 0.003031522725559901, -0.0055333532968188165, -0.013403099825723372, -0.018598682349642525, -0.01944761739590459, -0.015005271935951746, -0.0053887880354343935, 0.008056525910253532, 0.022816244158307273, 0.035513467692208076, 0.04244131815783876, 0.04025481153629372, 0.02671818654865632, 0.0013810216516704976, -0.03394615682795165, -0.07502635967975885, -0.11540977897637611, -0.14703962203941534, -0.16119995609538576, -0.14969512896336504, -0.10610329539459686, -0.026921412469634916, 0.08757875030779196, 0.23293327870303457, 0.4006012210123992, 0.5786324696325503, 0.7528286479934068, 0.908262741447522, 1.0309661131633199, 1.1095611856548013, 1.1366197723675815, 1.1095611856548013, 1.0309661131633199, 0.908262741447522, 0.7528286479934068, 0.5786324696325503, 0.4006012210123992, 0.23293327870303457, 0.08757875030779196, -0.026921412469634916, -0.10610329539459686, -0.14969512896336504, -0.16119995609538576, -0.14703962203941534, -0.11540977897637611, -0.07502635967975885, -0.03394615682795165, 0.0013810216516704976, 0.02671818654865632, 0.04025481153629372, 0.04244131815783876, 0.035513467692208076, 0.022816244158307273, 0.008056525910253532, -0.0053887880354343935, -0.015005271935951746, -0.01944761739590459, -0.018598682349642525, -0.013403099825723372, -0.0055333532968188165, 0.003031522725559901, 0.01042830577908502, 0.015256245142156299, 0.01679337935001369, 0.01505751553351295, 0.01071805138282269, 0.004891777252042491, -0.001125978562075172, -0.006136551625729697, -0.009265784007800534, -0.010105075751866371, -0.008746639552588416, -0.00571615173291049, -0.0018256054303579805, 0.002017321931508163, 0.0050017573119839134, 0.006569574194782443, 0.006506845894531803, 0.004957956568090113, 0.002365929161655135, -0.0006430502751187517, -0.003403189203405097, -0.005349511529163396, -0.006126925416243605, -0.005648131453822014, -0.004092346891623224, -0.0018493784971116507, 0.0005756567993179152, 0.002674727068399207, 0.00404219185231544, 0.004451886520053017, 0.0038920145144327816, 0.002553421969211845, 0.0007766690889758685, -0.0010285696910973807, -0.0024733964729590865, -0.0032697038088887226, -0.0032843366522956313, -0.0025577136087664687, -0.0012851320781224025, 0.00023319405581230247, 0.001661182944400927, 0.002699564567597445, 0.0031468394550958484, 0.0029364388513841593, 0.0
+};
 
 }} // mobilinkd::m17
diff --git a/TNC/M17.h b/TNC/M17.h
index b37f053..ae8450a 100644
--- a/TNC/M17.h
+++ b/TNC/M17.h
@@ -5,12 +5,25 @@
 
 #include <array>
 #include <cstdint>
+#include <cstddef>
 
 namespace mobilinkd { namespace m17 {
 
 constexpr size_t FILTER_TAP_NUM = 80;
+constexpr size_t FILTER_TAP_NUM_9 = 90;
+constexpr size_t FILTER_TAP_NUM_11 = 110;
+constexpr size_t FILTER_TAP_NUM_15 = 150;
+constexpr size_t FILTER_TAP_NUM_21 = 210;
 
 extern const std::array<int16_t, FILTER_TAP_NUM> rrc_taps;
+extern const std::array<int16_t, FILTER_TAP_NUM_9> rrc_taps_9;
+extern const std::array<int16_t, FILTER_TAP_NUM_11> rrc_taps_11;
+extern const std::array<int16_t, FILTER_TAP_NUM_15> rrc_taps_15;
+extern const std::array<int16_t, FILTER_TAP_NUM_21> rrc_taps_21;
+
+extern const std::array<float, FILTER_TAP_NUM_9> rrc_taps_f9;
+extern const std::array<float, FILTER_TAP_NUM_15> rrc_taps_f15;
+
 constexpr std::array<uint8_t, 2> LSF_SYNC = { 0x55, 0xF7 };
 constexpr std::array<uint8_t, 2> STREAM_SYNC = { 0xFF, 0x5D };
 constexpr std::array<uint8_t, 2> PACKET_SYNC = { 0x75, 0xFF };
diff --git a/TNC/M17Demodulator.cpp b/TNC/M17Demodulator.cpp
index 88d779e..da4c5c3 100644
--- a/TNC/M17Demodulator.cpp
+++ b/TNC/M17Demodulator.cpp
@@ -16,7 +16,7 @@ void M17Demodulator::start()
 {
     SysClock80();
 
-    demod_filter.init(m17::rrc_taps.data());
+    demod_filter.init(m17::rrc_taps_9.data());
     passall(kiss::settings().options & KISS_OPTION_PASSALL);
 
     hadc1.Init.OversamplingMode = DISABLE;
@@ -36,7 +36,7 @@ void M17Demodulator::start()
     if (HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK)
         CxxErrorHandler();
 
-    startADC(1666, ADC_BLOCK_SIZE);
+    startADC(1665, ADC_BLOCK_SIZE);
 //    getModulator().start_loopback();
 }
 
diff --git a/TNC/M17Demodulator.h b/TNC/M17Demodulator.h
index 28a22ff..60ceeae 100644
--- a/TNC/M17Demodulator.h
+++ b/TNC/M17Demodulator.h
@@ -43,12 +43,12 @@ struct M17Demodulator : IDemodulator
     static constexpr uint32_t SAMPLE_RATE = 48000;
     static constexpr uint16_t VREF = 4095;
 
-    using audio_filter_t = Q15FirFilter<ADC_BLOCK_SIZE, m17::FILTER_TAP_NUM>;
+    using audio_filter_t = Q15FirFilter<ADC_BLOCK_SIZE, m17::FILTER_TAP_NUM_9>;
     using demod_result_t = std::tuple<float, float, int, float>;
 
     enum class DemodState { UNLOCKED, LSF_SYNC, FRAME_SYNC, FRAME };
 
-    audio_filter_t demod_filter{m17::rrc_taps.data()};
+    audio_filter_t demod_filter{m17::rrc_taps_9.data()};
     const float sample_rate = 48000.0;
     const float symbol_rate = 4800.0;
     float gain = 0.01;
@@ -109,6 +109,7 @@ struct M17Demodulator : IDemodulator
         decoder.passall(enabled);
     }
 
+    [[gnu::noinline]]
     void frame(demod_result_t demod_result, hdlc::IoFrame*& result)
     {
         auto [sample, phase, symbol, evm] = demod_result;
@@ -186,8 +187,9 @@ struct M17Demodulator : IDemodulator
                     sync_count = 0;
                     std::copy(tmp, tmp + len, buffer.begin());
                     auto valid = decoder(sync_word_type, buffer, result, ber);
-                    if (!valid)
+                    switch (valid)
                     {
+                    case M17FrameDecoder::DecodeResult::FAIL:
                         WARN("decode invalid");
                         if (result && !passall_)
                         {
@@ -195,10 +197,13 @@ struct M17Demodulator : IDemodulator
                             if (result) hdlc::release(result);
                             result = 0;
                         }
-                    }
-                    else
-                    {
+                        break;
+                    case M17FrameDecoder::DecodeResult::EOS:
+                        demodState = DemodState::LSF_SYNC;
+                        break;
+                    case M17FrameDecoder::DecodeResult::OK:
                         INFO("valid frame for sync word type %d", int(sync_word_type));
+                        break;
                     }
                 }
             }
@@ -214,6 +219,7 @@ struct M17Demodulator : IDemodulator
         }
     }
 
+    [[gnu::noinline]]
     demod_result_t demod()
     {
         int16_t polarity = kiss::settings().rx_rev_polarity() ? -1 : 1;
diff --git a/TNC/M17Encoder.cpp b/TNC/M17Encoder.cpp
index 6530dca..becbf4f 100644
--- a/TNC/M17Encoder.cpp
+++ b/TNC/M17Encoder.cpp
@@ -78,7 +78,7 @@ void M17Encoder::run()
     osThreadResume(encoderTaskHandle);
 
     auto start = osKernelSysTick();
-    uint32_t delay_ms = 0;
+    int32_t delay_ms = 0;
 
     state = State::IDLE;
 
@@ -118,14 +118,23 @@ void M17Encoder::run()
             }
 
             evt = osMessagePeek(input_queue, delay_ms);
-            auto msgs = osMessageWaiting(input_queue);
+            // auto num_msgs = osMessageWaiting(input_queue);
             back2back = (evt.status == osEventMessage);
             if (!back2back)
             {
                 if (state != State::IDLE)
                 {
-                    state = State::IDLE;
                     WARN("Timed out waiting for packet (%lums).", delay_ms);
+                    size_t counter = 5;
+                    do {
+                        send_link_setup();
+                        evt = osMessagePeek(input_queue, 40);
+                    } while (evt.status != osEventMessage && --counter != 0);
+
+                    if (evt.status != osEventMessage) {
+                        state = State::IDLE;
+                        WARN("Timed out waiting for packet.");
+                    }
                 }
                 delay_ms = 0;
             }
@@ -235,16 +244,16 @@ void M17Encoder::send_preamble()
 
 void M17Encoder::send_link_setup()
 {
-    punctured.fill(0);
+    m17_frame.fill(0);
     auto frame = tnc::hdlc::acquire_wait();
 
     // Encoder, puncture, interleave & randomize.
     auto encoded = conv_encode(current_lsf);
-    puncture_bytes(encoded, punctured, P1);
-    interleaver.interleave(punctured);
-    randomizer(punctured);
+    puncture_bytes(encoded, m17_frame, P1);
+    interleaver.interleave(m17_frame);
+    randomizer(m17_frame);
     for (auto c : m17::LSF_SYNC) frame->push_back(c);
-    for (auto c : punctured) frame->push_back(c);
+    for (auto c : m17_frame) frame->push_back(c);
 
     auto status = osMessagePut(
         m17EncoderInputQueueHandle,
@@ -253,7 +262,7 @@ void M17Encoder::send_link_setup()
     if (status != osOK)
     {
         tnc::hdlc::release(frame);
-        WARN("M17 failed to send preamble");
+        WARN("M17 failed to send LSF");
     }
 }
 
@@ -306,18 +315,16 @@ void M17Encoder::send_full_packet(tnc::hdlc::IoFrame* frame)
 
 void M17Encoder::send_packet_frame(const std::array<uint8_t, 26>& packet_frame)
 {
-    frame_t punctured;
-
     // Encoder, puncture, interleave & randomize.
     auto encoded = conv_encode(packet_frame, 206);
-    puncture_bytes(encoded, punctured, P3);
-    interleaver.interleave(punctured);
-    randomizer(punctured);
+    puncture_bytes(encoded, m17_frame, P3);
+    interleaver.interleave(m17_frame);
+    randomizer(m17_frame);
 
     auto frame = tnc::hdlc::acquire_wait();
 
     for (auto c : m17::PACKET_SYNC) frame->push_back(c);
-    for (auto c : punctured) frame->push_back(c);
+    for (auto c : m17_frame) frame->push_back(c);
 
     auto status = osMessagePut(
         m17EncoderInputQueueHandle,
@@ -332,9 +339,6 @@ void M17Encoder::send_packet_frame(const std::array<uint8_t, 26>& packet_frame)
 
 void M17Encoder::send_stream(tnc::hdlc::IoFrame* frame, FrameType)
 {
-    payload_t punctured;        // Punctured audio payload (272 bits, 34 bytes).
-    frame_t m17_frame;
-
     // Construct LICH.
     auto it = frame->begin();
     std::advance(it, 6);
@@ -347,9 +351,11 @@ void M17Encoder::send_stream(tnc::hdlc::IoFrame* frame, FrameType)
     std::array<uint8_t, 20> data;
     std::copy(it, frame->end(), data.begin());
 
+    if (data[0] & 0x80) state = State::IDLE; // EOS
+
     auto encoded = conv_encode(data);
-    puncture_bytes(encoded, punctured, P2);
-    std::copy(punctured.begin(), punctured.end(), fit); // Copy after LICH.
+    puncture_bytes(encoded, stream_payload, P2);
+    std::copy(stream_payload.begin(), stream_payload.end(), fit); // Copy after LICH.
 
     interleaver.interleave(m17_frame);  // Interleave entire frame.
     randomizer(m17_frame);              // Randomize entire frame.
@@ -409,6 +415,7 @@ void M17Encoder::create_link_setup(tnc::hdlc::IoFrame* frame, FrameType type)
 /**
  * Encode each LSF segment into a Golay-encoded LICH segment bitstream.
  */
+[[gnu::noinline]]
 M17Encoder::lich_segment_t M17Encoder::make_lich_segment(
     std::array<uint8_t, 6> segment)
 {
@@ -511,6 +518,7 @@ void M17Encoder::encoderTask(void const*)
     {
         osEvent evt = osMessageGet(m17EncoderInputQueueHandle, osWaitForever);
         if (evt.status != osEventMessage) continue;
+
         auto frame = static_cast<IoFrame*>(evt.value.p);
         if (frame->size() != 48) WARN("Bad frame size %u", frame->size());
 
diff --git a/TNC/M17Encoder.h b/TNC/M17Encoder.h
index bd4b6c5..9b750a1 100644
--- a/TNC/M17Encoder.h
+++ b/TNC/M17Encoder.h
@@ -189,7 +189,8 @@ private:
     osThreadId encoderTaskHandle;
     State state = State::INACTIVE;
 
-    frame_t punctured;
+    frame_t m17_frame;
+    payload_t stream_payload;
     lsf_t current_lsf;
     LinkSetupFrame::encoded_call_t src;
     LinkSetupFrame::encoded_call_t dest;
diff --git a/TNC/M17FrameDecoder.h b/TNC/M17FrameDecoder.h
index 08a26e7..65761e7 100644
--- a/TNC/M17FrameDecoder.h
+++ b/TNC/M17FrameDecoder.h
@@ -152,8 +152,10 @@ struct M17FrameDecoder
     Viterbi<decltype(trellis_), 4> viterbi_{trellis_};
     CRC16<0x5935, 0xFFFF> crc_;
 
+
     enum class State {LSF, STREAM, BASIC_PACKET, FULL_PACKET};
     enum class SyncWordType { LSF, STREAM, PACKET, RESERVED };
+    enum class DecodeResult { FAIL, OK, EOS };
 
     State state_ = State::LSF;
 
@@ -172,6 +174,7 @@ struct M17FrameDecoder
     audio_callback_t audio_callback_;
     union
     {
+        std::array<uint8_t, 30> lich;
         std::array<uint8_t, 240> lsf;
         std::array<uint8_t, 206> packet;
         std::array<uint8_t, 160> stream;
@@ -261,7 +264,8 @@ struct M17FrameDecoder
      * @param ber
      * @return
      */
-    bool decode_lsf(buffer_t& buffer, tnc::hdlc::IoFrame*& lsf, int& ber)
+    [[gnu::noinline]]
+    DecodeResult decode_lsf(buffer_t& buffer, tnc::hdlc::IoFrame*& lsf, int& ber)
     {
         depuncture(buffer, tmp.lsf, P1);
         ber = viterbi_.decode(tmp.lsf, output.lsf);
@@ -282,16 +286,16 @@ struct M17FrameDecoder
                 lsf->push_back(0);
                 lsf->push_back(0);
                 lsf->source(0x20);
-                return true;
+                return DecodeResult::OK;
             }
             lsf = nullptr;
-            return true;
+            return DecodeResult::OK;
         }
         else
         {
             lich_segments = 0;
             output.lsf.fill(0);
-            return false;
+            return DecodeResult::FAIL;
         }
     }
 
@@ -315,7 +319,7 @@ struct M17FrameDecoder
                 return false;
             }
             decoded >>= 12; // Remove check bits and parity.
-            INFO("Golay decode good for %08lx (%du)", decoded, i);
+            DEBUG("Golay decode good for %08lx (%du)", decoded, i);
             // append codeword.
             if (i & 1)
             {
@@ -331,47 +335,51 @@ struct M17FrameDecoder
         return true;
     }
 
-    bool decode_lich(buffer_t& buffer, tnc::hdlc::IoFrame*& lsf, int& ber)
+    [[gnu::noinline]]
+    DecodeResult decode_lich(buffer_t& buffer, tnc::hdlc::IoFrame*& lsf, int& ber)
     {
         tmp.lich.fill(0);
         // Read the 4 12-bit codewords from LICH into buffers.lich.
-        if (!unpack_lich(buffer)) return false;
+        if (!unpack_lich(buffer)) return DecodeResult::FAIL;
 
         uint8_t fragment_number = tmp.lich[5];   // Get fragment number.
         fragment_number = (fragment_number >> 5) & 7;
 
         // Copy decoded LICH to superframe buffer.
         std::copy(tmp.lich.begin(), tmp.lich.begin() + 5,
-            output.lsf.begin() + (fragment_number * 5));
+            output.lich.begin() + (fragment_number * 5));
 
         lich_segments |= (1 << fragment_number);        // Indicate segment received.
         INFO("got segment %d, have %02x", int(fragment_number), int(lich_segments));
-        if (lich_segments != 0x3F) return false;        // More to go...
+        if (lich_segments != 0x3F) return DecodeResult::FAIL;        // More to go...
 
-        detail::to_bytes(output.lsf, current_lsf);
         crc_.reset();
-        for (auto c : current_lsf) crc_(c);
+        for (auto c : output.lich) crc_(c);
         auto checksum = crc_.get();
         INFO("LICH crc = %04x", checksum);
         if (checksum == 0)
         {
             state_ = State::STREAM;
             lsf = tnc::hdlc::acquire_wait();
-            for (auto c : current_lsf) lsf->push_back(c);
+            for (auto c : output.lich) lsf->push_back(c);
             lsf->push_back(0);
             lsf->push_back(0);
             lsf->source(0x20);
             ber = 0;
-            return true;
+            return DecodeResult::OK;
         }
+#ifdef KISS_LOGGING
+        dump(output.lich);
+#endif
         // Failed CRC... try again.
         lich_segments = 0;
-        output.lsf.fill(0);
+        output.lich.fill(0);
         ber = 128;
-        return false;
+        return DecodeResult::FAIL;
     }
 
-    bool decode_stream(buffer_t& buffer, tnc::hdlc::IoFrame*& stream, int& ber)
+    [[gnu::noinline]]
+    DecodeResult decode_stream(buffer_t& buffer, tnc::hdlc::IoFrame*& stream, int& ber)
     {
         std::array<uint8_t, 20> stream_segment;
 
@@ -391,10 +399,15 @@ struct M17FrameDecoder
         for (auto c : stream_segment) crc_(c);
         auto checksum = crc_.get();
         INFO("crc = %04x", checksum);   // Otherwise ignored.
+        if ((checksum == 0) && (stream_segment[0] & 0x80))
+        {
+            INFO("EOS");
+            state_ = State::LSF;
+        }
         stream->push_back(0);
         stream->push_back(0);
         stream->source(0x20);
-        return true;
+        return state_ == State::LSF ? DecodeResult::EOS : DecodeResult::OK;
     }
 
     /**
@@ -408,7 +421,8 @@ struct M17FrameDecoder
      * @param ber the estimated BER (really more SNR) of the packet.
      * @return true if a valid packet is returned, otherwise false.
      */
-    bool decode_basic_packet(buffer_t& buffer, tnc::hdlc::IoFrame*& packet, int& ber)
+    [[gnu::noinline]]
+    DecodeResult decode_basic_packet(buffer_t& buffer, tnc::hdlc::IoFrame*& packet, int& ber)
     {
         std::array<uint8_t, 26> packet_segment;
 
@@ -439,7 +453,7 @@ struct M17FrameDecoder
                 current_packet->source(0);
                 packet = current_packet;
                 current_packet = nullptr;
-                return true;
+                return DecodeResult::OK;
             }
             WARN("packet bad fcs = %04x, crc = %04x", current_packet->fcs(), current_packet->crc());
             if (passall_)
@@ -452,7 +466,7 @@ struct M17FrameDecoder
                 tnc::hdlc::release(current_packet);
                 current_packet = nullptr;
             }
-            return false;
+            return DecodeResult::FAIL;
         }
 
         size_t frame_number = (packet_segment[25] & 0x7F) >> 2;
@@ -467,7 +481,7 @@ struct M17FrameDecoder
         }
 
         packet = nullptr;
-        return true;
+        return DecodeResult::OK;
     }
 
     /**
@@ -481,7 +495,8 @@ struct M17FrameDecoder
      * @param ber
      * @return
      */
-    bool decode_full_packet(buffer_t& buffer, tnc::hdlc::IoFrame*& packet, int& ber)
+    [[gnu::noinline]]
+    DecodeResult decode_full_packet(buffer_t& buffer, tnc::hdlc::IoFrame*& packet, int& ber)
     {
         std::array<uint8_t, 26> packet_segment;
 
@@ -510,7 +525,7 @@ struct M17FrameDecoder
             current_packet = nullptr;
             packet_frame_counter = 0;
             state_ = State::LSF;
-            return true;
+            return DecodeResult::OK;
         }
 
         size_t frame_number = (packet_segment[25] & 0x7F) >> 2;
@@ -525,7 +540,7 @@ struct M17FrameDecoder
         }
 
         packet = nullptr;
-        return true;
+        return DecodeResult::OK;
     }
 
     /**
@@ -564,7 +579,8 @@ struct M17FrameDecoder
      *  - FULL_PACKET when any packet frame is received.
      *  - LSF when the EOS indicator is set, or when a stream frame is received.
      */
-    bool operator()(SyncWordType frame_type, buffer_t& buffer,
+    [[gnu::noinline]]
+    DecodeResult operator()(SyncWordType frame_type, buffer_t& buffer,
         tnc::hdlc::IoFrame*& result, int& ber)
     {
         derandomize_(buffer);
@@ -603,7 +619,7 @@ struct M17FrameDecoder
             break;
         }
 
-        return false;
+        return DecodeResult::FAIL;
     }
 };
 
diff --git a/TNC/M17Modulator.cpp b/TNC/M17Modulator.cpp
index 099d012..eced929 100644
--- a/TNC/M17Modulator.cpp
+++ b/TNC/M17Modulator.cpp
@@ -14,7 +14,8 @@ void M17Modulator::init(const kiss::Hardware& hw)
     SysClock80();
 
     // Configure 80MHz clock for 48kHz.
-    htim7.Init.Period = 1666;
+    htim7.Init.Period = 1665;
+    htim7.Init.Prescaler = 0;
     if (HAL_TIM_Base_Init(&htim7) != HAL_OK)
     {
         ERROR("htim7 init failed");
diff --git a/TNC/M17Modulator.h b/TNC/M17Modulator.h
index f018c75..5d95239 100644
--- a/TNC/M17Modulator.h
+++ b/TNC/M17Modulator.h
@@ -26,29 +26,30 @@ struct M17Modulator : Modulator
     // Six buffers per M17 frame, or 12 half-buffer interrupts.
     static constexpr uint8_t UPSAMPLE = 10;
     static constexpr uint32_t BLOCKSIZE = 4;
-    static constexpr uint32_t STATE_SIZE = (m17::FILTER_TAP_NUM / UPSAMPLE) + BLOCKSIZE - 1;
+    static constexpr uint32_t STATE_SIZE = (m17::FILTER_TAP_NUM_15 / UPSAMPLE) + BLOCKSIZE - 1;
     static constexpr int16_t DAC_BUFFER_LEN = 80;               // 8 symbols, 16 bits, 2 bytes.
     static constexpr int16_t TRANSFER_LEN = DAC_BUFFER_LEN / 2; // 4 symbols, 8 bits, 1 byte.
     static constexpr uint16_t VREF = 4095;
     enum class State { STOPPED, STARTING, RUNNING, STOPPING };
 
-    arm_fir_interpolate_instance_q15 fir_interpolator;
-    std::array<q15_t, STATE_SIZE> fir_state;
+    arm_fir_interpolate_instance_f32 fir_interpolator;
+    std::array<float, STATE_SIZE> fir_state;
     std::array<int16_t, DAC_BUFFER_LEN> buffer_;
-    std::array<int16_t, 4> symbols;
+    std::array<float, 4> symbols;
     osMessageQId dacOutputQueueHandle_{0};
     PTT* ptt_{nullptr};
     uint16_t volume_{4096};
     volatile uint16_t delay_count = 0;      // TX Delay
     volatile uint16_t stop_count = 0;       // Flush the RRC matched filter.
     State state{State::STOPPED};
+    float tmp[TRANSFER_LEN];
 
     M17Modulator(osMessageQId queue, PTT* ptt)
     : dacOutputQueueHandle_(queue), ptt_(ptt)
     {
-        arm_fir_interpolate_init_q15(
-            &fir_interpolator, UPSAMPLE, m17::FILTER_TAP_NUM,
-            (q15_t*) m17::rrc_taps.data(), fir_state.data(), BLOCKSIZE);
+        arm_fir_interpolate_init_f32(
+            &fir_interpolator, UPSAMPLE, m17::FILTER_TAP_NUM_15,
+            (float32_t*) m17::rrc_taps_f15.data(), fir_state.data(), BLOCKSIZE);
     }
 
     ~M17Modulator() override {}
@@ -96,6 +97,7 @@ struct M17Modulator : Modulator
     void send(uint8_t bits) override
     {
         uint16_t txdelay = 0;
+
         switch (state)
         {
         case State::STOPPING:
@@ -115,7 +117,7 @@ struct M17Modulator : Modulator
             start_conversion();
             ptt_->on();
             while (delay_count < txdelay) osThreadYield();
-            stop_count = 2; // 8 symbols to flush the RRC filter.
+            stop_count = 4; // 16 symbols to flush the RRC filter.
             osMessagePut(dacOutputQueueHandle_, bits, osWaitForever);
             state = State::RUNNING;
             break;
@@ -126,12 +128,13 @@ struct M17Modulator : Modulator
     }
 
     // DAC DMA interrupt functions.
-
+    [[gnu::noinline]]
     void fill_first(uint8_t bits) override
     {
         fill(buffer_.data(), bits);
     }
 
+    [[gnu::noinline]]
     void fill_last(uint8_t bits) override
     {
         fill(buffer_.data() + TRANSFER_LEN, bits);
@@ -256,11 +259,13 @@ private:
             DAC_ALIGN_12B_R);
     }
 
-    uint16_t adjust_level(int32_t sample) const
+    uint16_t adjust_level(float sample) const
     {
         sample *= volume_;
-        sample >>= 12;
+        sample /= 8;
         sample += 2048;
+        if (sample > 4095) sample = 4095;
+        else if (sample < 0) sample = 0;
         return sample;
     }
 
@@ -276,35 +281,51 @@ private:
         return 0;
     }
 
+    constexpr int16_t symbol_skew(int32_t symbol)
+    {
+        const size_t shift = 8;
+        if (symbol == 1 || symbol == -1)
+        {
+            int32_t offset = ((symbol * (kiss::settings().tx_twist - 50)) << shift) / 50;
+            return (symbol << shift) - offset;
+        }
+        else
+        {
+            return symbol << shift;
+        }
+    }
+
+    [[gnu::noinline]]
     void fill(int16_t* buffer, uint8_t bits)
     {
         int16_t polarity = kiss::settings().tx_rev_polarity() ? -1 : 1;
 
         for (size_t i = 0; i != 4; ++i)
         {
-            symbols[i] = (bits_to_symbol(bits >> 6) << 10) * polarity;
+            symbols[i] = bits_to_symbol(bits >> 6) * polarity;
             bits <<= 2;
         }
 
-        arm_fir_interpolate_q15(
-            &fir_interpolator, symbols.data(), buffer, BLOCKSIZE);
+        arm_fir_interpolate_f32(
+            &fir_interpolator, symbols.data(), tmp, BLOCKSIZE);
 
         for (size_t i = 0; i != TRANSFER_LEN; ++i)
         {
-            buffer[i] = adjust_level(buffer[i]);
+            buffer[i] = adjust_level(tmp[i]);
         }
     }
 
+    [[gnu::noinline]]
     void fill_empty(int16_t* buffer)
     {
         symbols.fill(0);
 
-        arm_fir_interpolate_q15(
-            &fir_interpolator, symbols.data(), buffer, BLOCKSIZE);
+        arm_fir_interpolate_f32(
+            &fir_interpolator, symbols.data(), tmp, BLOCKSIZE);
 
         for (size_t i = 0; i != TRANSFER_LEN; ++i)
         {
-            buffer[i] = adjust_level(buffer[i]);
+            buffer[i] = adjust_level(tmp[i]);
         }
     }
 };
diff --git a/TNC/Viterbi.h b/TNC/Viterbi.h
index b566bc8..bf964cc 100644
--- a/TNC/Viterbi.h
+++ b/TNC/Viterbi.h
@@ -6,7 +6,9 @@
 #include "Convolution.h"
 #include "Util.h"
 
+#include <array>
 #include <limits>
+#include <span>
 
 namespace mobilinkd
 {
@@ -107,27 +109,62 @@ struct Viterbi
     state_transition_t nextState_;
     state_transition_t prevState_;
 
+    metrics_t prevMetrics, currMetrics;
+
+    std::array<std::bitset<NumStates>, 244> history_storage_;
+
     Viterbi(Trellis_ trellis)
     : cost_(makeCost<Trellis_, LLR_>(trellis))
     , nextState_(makeNextState(trellis))
     , prevState_(makePrevState(trellis))
     {}
 
+    [[gnu::noinline]]
+    void calculate_path_metric(
+        const std::array<int16_t, NumStates / 2>& cost0,
+        const std::array<int16_t, NumStates / 2>& cost1,
+        std::bitset<NumStates>& hist,
+        size_t j
+    ) {
+        auto& i0 = nextState_[j][0];
+        auto& i1 = nextState_[j][1];
+
+        int16_t c0 = cost0[j];
+        int16_t c1 = cost1[j];
+
+        auto& p0 = prevMetrics[j];
+        auto& p1 = prevMetrics[j + NumStates / 2];
+
+        int32_t m0 = p0 + c0;
+        int32_t m1 = p0 + c1;
+        int32_t m2 = p1 + c1;
+        int32_t m3 = p1 + c0;
+
+        bool d0 = m0 > m2;
+        bool d1 = m1 > m3;
+
+        hist.set(i0, d0);
+        hist.set(i1, d1);
+        currMetrics[i0] = d0 ? m2 : m0;
+        currMetrics[i1] = d1 ? m3 : m1;
+    }
+
     /**
      * Viterbi soft decoder using LLR inputs where 0 == erasure.
      * 
      * @return path metric for estimating BER.
      */
     template <size_t IN, size_t OUT>
-    size_t decode(std::array<int8_t, IN> in, std::array<uint8_t, OUT>& out)
+    size_t decode(std::array<int8_t, IN> const& in, std::array<uint8_t, OUT>& out)
     {
+        static_assert(sizeof(history_storage_) >= IN / 2);
+
         constexpr auto MAX_METRIC = std::numeric_limits<typename metrics_t::value_type>::max() / 2;
 
-        metrics_t prevMetrics, currMetrics;
         prevMetrics.fill(MAX_METRIC);
         prevMetrics[0] = 0;     // Starting point.
 
-        std::array<std::bitset<NumStates>, IN / 2> history;
+        std::span history(history_storage_.begin(), history_storage_.begin() + IN / 2);
 
         constexpr size_t BUTTERFLY_SIZE = NumStates / 2;
 
@@ -150,27 +187,7 @@ struct Viterbi
             
             for (size_t j = 0; j != BUTTERFLY_SIZE; ++j)
             {
-                auto& i0 = nextState_[j][0];
-                auto& i1 = nextState_[j][1];
-
-                int16_t c0 = cost0[j];
-                int16_t c1 = cost1[j];
-
-                auto& p0 = prevMetrics[j];
-                auto& p1 = prevMetrics[j + BUTTERFLY_SIZE];
-
-                int32_t m0 = p0 + c0;
-                int32_t m1 = p0 + c1;
-                int32_t m2 = p1 + c1;
-                int32_t m3 = p1 + c0;
-
-                bool d0 = m0 > m2;
-                bool d1 = m1 > m3;
-
-                hist.set(i0, d0);
-                hist.set(i1, d1);
-                currMetrics[i0] = d0 ? m2 : m0;
-                currMetrics[i1] = d1 ? m3 : m1;
+                calculate_path_metric(cost0, cost1, hist, j);
             }
             std::swap(currMetrics, prevMetrics);
             hindex += 1;