Added support for ESP32-S3 MCU using Zephyr RTOS

.gitignore

@@ -1,5 +1,5 @@
-# Meson build dirs
-build_*
+#Build dirs
+build*
 
 # Prerequisites
 *.d

CMakeLists.txt

@@ -0,0 +1,113 @@
+# SPDX-License-Identifier: GPL-3.0-or-later
+
+cmake_minimum_required(VERSION 3.20.0)
+
+find_package(Zephyr REQUIRED HINTS $ENV{ZEPHYR_BASE})
+project(openrtx)
+
+execute_process(COMMAND git describe --tags --dirty
+                OUTPUT_VARIABLE GIT_VER_ID
+                ERROR_QUIET
+                OUTPUT_STRIP_TRAILING_WHITESPACE)
+
+target_compile_definitions(app
+  PRIVATE
+    FONT_UBUNTU_REGULAR
+    CODEC2_MODE_EN_DEFAULT=0
+    FREEDV_MODE_EN_DEFAULT=0
+    CODEC2_MODE_3200_EN=1
+    M_PI=3.14159265358979323846f
+    GIT_VERSION="${GIT_VER_ID}"
+)
+
+target_include_directories(app
+  PRIVATE
+
+    openrtx/include
+    openrtx/include/rtx
+    openrtx/include/core
+    openrtx/include/calibration
+    openrtx/include/protocols
+    openrtx/include/fonts/adafruit
+    openrtx/include/fonts/symbols
+    platform/drivers/ADC
+    platform/drivers/NVM
+    platform/drivers/GPS
+    platform/drivers/USB
+    platform/drivers/tones
+    platform/drivers/baseband
+    platform/drivers/backlight
+    platform/drivers/chSelector
+
+    subprojects/codec2
+    subprojects/codec2/src
+
+    lib/minmea/include
+    lib/qdec/include
+)
+
+target_sources(app
+  PRIVATE
+
+    openrtx/src/main.c
+    openrtx/src/core/state.c
+    openrtx/src/core/threads.c
+    openrtx/src/core/battery.c
+    openrtx/src/core/graphics.c
+    openrtx/src/core/input.c
+    openrtx/src/core/utils.c
+    openrtx/src/core/queue.c
+    openrtx/src/core/chan.c
+    openrtx/src/core/gps.c
+    openrtx/src/core/dsp.cpp
+    openrtx/src/core/cps.c
+    openrtx/src/core/crc.c
+    openrtx/src/core/datetime.c
+    openrtx/src/core/openrtx.c
+    openrtx/src/core/audio_codec.c
+    openrtx/src/core/audio_stream.c
+    openrtx/src/core/audio_path.cpp
+    openrtx/src/core/data_conversion.c
+    openrtx/src/core/memory_profiling.cpp
+    openrtx/src/core/voicePrompts.c
+    openrtx/src/core/voicePromptUtils.c
+    openrtx/src/core/voicePromptData.S
+    openrtx/src/rtx/rtx.cpp
+    openrtx/src/rtx/OpMode_FM.cpp
+    openrtx/src/rtx/OpMode_M17.cpp
+    openrtx/src/protocols/M17/M17DSP.cpp
+    openrtx/src/protocols/M17/M17Golay.cpp
+    openrtx/src/protocols/M17/M17Callsign.cpp
+    openrtx/src/protocols/M17/M17Modulator.cpp
+    openrtx/src/protocols/M17/M17Demodulator.cpp
+    openrtx/src/protocols/M17/M17FrameEncoder.cpp
+    openrtx/src/protocols/M17/M17FrameDecoder.cpp
+    openrtx/src/protocols/M17/M17LinkSetupFrame.cpp
+
+    openrtx/src/ui/default/ui.c
+    openrtx/src/ui/default/ui_main.c
+    openrtx/src/ui/default/ui_menu.c
+    openrtx/src/ui/default/ui_strings.c
+
+    subprojects/codec2/src/dump.c
+    subprojects/codec2/src/lpc.c
+    subprojects/codec2/src/nlp.c
+    subprojects/codec2/src/phase.c
+    subprojects/codec2/src/quantise.c
+    subprojects/codec2/src/postfilter.c
+    subprojects/codec2/src/codec2.c
+    subprojects/codec2/src/codec2_fft.c
+    subprojects/codec2/src/lsp.c
+    subprojects/codec2/src/sine.c
+    subprojects/codec2/src/interp.c
+    subprojects/codec2/src/kiss_fft.c
+    subprojects/codec2/src/kiss_fftr.c
+    subprojects/codec2/src/newamp1.c
+    subprojects/codec2/src/codebook.c
+    subprojects/codec2/src/codebookd.c
+    subprojects/codec2/src/pack.c
+    subprojects/codec2/src/codebooknewamp1.c
+    subprojects/codec2/src/codebooknewamp1_energy.c
+
+    lib/minmea/minmea.c
+)

platform/mcu/ESP32S3/drivers/delays.c

@@ -0,0 +1,52 @@
+/***************************************************************************
+ *   Copyright (C) 2023 by Silvano Seva IU2KWO                             *
+ *                                                                         *
+ *   This program is free software; you can redistribute it and/or modify  *
+ *   it under the terms of the GNU General Public License as published by  *
+ *   the Free Software Foundation; either version 3 of the License, or     *
+ *   (at your option) any later version.                                   *
+ *                                                                         *
+ *   This program is distributed in the hope that it will be useful,       *
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
+ *   GNU General Public License for more details.                          *
+ *                                                                         *
+ *   You should have received a copy of the GNU General Public License     *
+ *   along with this program; if not, see <http://www.gnu.org/licenses/>   *
+ ***************************************************************************/
+
+#include <interfaces/delays.h>
+#include <zephyr/kernel.h>
+#include <stdint.h>
+
+
+void delayUs(unsigned int useconds)
+{
+    k_usleep(useconds);
+}
+
+void delayMs(unsigned int mseconds)
+{
+    k_msleep(mseconds);
+}
+
+void sleepFor(unsigned int seconds, unsigned int mseconds)
+{
+    uint64_t duration = (seconds * 1000) + mseconds;
+    k_sleep(K_MSEC(duration));
+}
+
+void sleepUntil(long long timestamp)
+{
+    if(timestamp <= k_uptime_get())
+        return;
+
+    k_sleep(K_TIMEOUT_ABS_MS(timestamp));
+}
+
+long long getTick()
+{
+    // k_uptime_get() returns the elapsed time since the system booted,
+    // in milliseconds.
+    return k_uptime_get();
+}

platform/mcu/ESP32S3/zephyr.conf

@@ -0,0 +1,21 @@
+CONFIG_POSIX_CLOCK=y
+CONFIG_PTHREAD_IPC=y
+CONFIG_CPP=y
+CONFIG_REQUIRES_FULL_LIBCPP=y
+CONFIG_STD_CPP14=y
+CONFIG_PRINTK=y
+CONFIG_LOG=y
+CONFIG_LOG_PRINTK=y
+CONFIG_LOG_MODE_IMMEDIATE=y
+CONFIG_XTENSA_RESET_VECTOR=n
+CONFIG_SOC_ESP32S3=y
+CONFIG_MAIN_STACK_SIZE=2048
+CONFIG_XTENSA_USE_CORE_CRT1=n
+CONFIG_CONSOLE=y
+CONFIG_SERIAL=y
+CONFIG_UART_CONSOLE=y
+CONFIG_GPIO=y
+CONFIG_GEN_ISR_TABLES=y
+CONFIG_GEN_IRQ_VECTOR_TABLE=n
+CONFIG_CLOCK_CONTROL=y
+CONFIG_I2C=y