Ebyte E77 (STM32) DevKit support (#6255)

variants/CDEBYTE_E77-MBL/platformio.ini

@@ -0,0 +1,41 @@
+[env:CDEBYTE_E77-MBL]
+extends = stm32_base
+; `ebyte_e77_dev` was added in this commit. Remove when a new release is used in the base.
+platform = https://github.com/platformio/platform-ststm32.git#3208828db447f4373cd303b7f7393c8fc0dae623
+board = ebyte_e77_dev
+board_level = extra
+build_flags =
+  ${stm32_base.build_flags}
+  -Ivariants/CDEBYTE_E77-MBL
+  -DSERIAL_UART_INSTANCE=1
+  -DPIN_SERIAL_RX=PA3
+  -DPIN_SERIAL_TX=PA2
+  -DHAL_DAC_MODULE_ONLY
+  -DHAL_ADC_MODULE_DISABLED
+  -DHAL_COMP_MODULE_DISABLED
+  -DHAL_CRC_MODULE_DISABLED
+  -DHAL_CRYP_MODULE_DISABLED
+  -DHAL_GTZC_MODULE_DISABLED
+  -DHAL_HSEM_MODULE_DISABLED
+  -DHAL_I2C_MODULE_DISABLED
+  -DHAL_I2S_MODULE_DISABLED
+  -DHAL_IPCC_MODULE_DISABLED
+  -DHAL_IRDA_MODULE_DISABLED
+  -DHAL_IWDG_MODULE_DISABLED
+  -DHAL_LPTIM_MODULE_DISABLED
+  -DHAL_PKA_MODULE_DISABLED
+  -DHAL_RNG_MODULE_DISABLED
+  -DHAL_RTC_MODULE_DISABLED
+  -DHAL_SMARTCARD_MODULE_DISABLED
+  -DHAL_SMBUS_MODULE_DISABLED
+  -DHAL_TIM_MODULE_DISABLED
+  -DHAL_WWDG_MODULE_DISABLED
+  -DHAL_EXTI_MODULE_DISABLED
+  -DHAL_SAI_MODULE_DISABLED
+  -DHAL_ICACHE_MODULE_DISABLED
+  -DRADIOLIB_EXCLUDE_SX128X=1
+  -DRADIOLIB_EXCLUDE_SX127X=1
+  -DRADIOLIB_EXCLUDE_LR11X0=1
+; -D PIO_FRAMEWORK_ARDUINO_NANOLIB_FLOAT_PRINTF
+
+upload_port = stlink

variants/CDEBYTE_E77-MBL/variant.h

@@ -0,0 +1,23 @@
+/*
+EByte E77-MBL series
+https://www.cdebyte.com/products/E77-900MBL-01
+https://www.cdebyte.com/products/E77-400MBL-01
+https://github.com/olliw42/mLRS-docu/blob/master/docs/EBYTE_E77_MBL.md
+*/
+
+/*
+This variant is a work in progress.
+Do not expect a working Meshtastic device with this target.
+*/
+
+#ifndef _VARIANT_EBYTE_E77_
+#define _VARIANT_EBYTE_E77_
+
+#define USE_STM32WLx
+#define MAX_NUM_NODES 10
+
+#define LED_PIN PB4 // LED1
+// #define LED_PIN PB3 // LED2
+#define LED_STATE_ON 1
+
+#endif