Add MeshCore relay_radio firmware for Heltec T114

variants/rak3x72/platformio.ini

@@ -0,0 +1,48 @@
+[rak3x72]
+extends = stm32_base
+board = rak3172
+board_upload.maximum_size = 229376 ; 32kb for FS
+build_flags = ${stm32_base.build_flags}
+  -D RAK_3X72
+  -D RADIO_CLASS=CustomSTM32WLx
+  -D WRAPPER_CLASS=CustomSTM32WLxWrapper
+  -D SPI_INTERFACES_COUNT=0
+  -D RX_BOOSTED_GAIN=true
+;  -D STM32WL_TCXO_VOLTAGE=1.6 ; defaults to 0 if undef
+;  -D LORA_TX_POWER=14 ; Defaults to 22 for HP, 14 is for LP version
+  -I variants/rak3x72
+build_src_filter = ${stm32_base.build_src_filter}
+  +<../variants/rak3x72>
+
+[env:RAK_3x72_repeater]
+extends = rak3x72
+build_flags = ${rak3x72.build_flags}
+  -D ADVERT_NAME='"RAK3x72 Repeater"'
+  -D ADMIN_PASSWORD='"password"'
+  -D MAX_NEIGHBOURS=50
+build_src_filter = ${rak3x72.build_src_filter}
+  +<../examples/simple_repeater/*.cpp>
+
+[env:RAK_3x72_sensor]
+extends = rak3x72
+build_flags = ${rak3x72.build_flags}
+  -D ADVERT_NAME='"RAK3x72 Sensor"'
+  -D ADMIN_PASSWORD='"password"'
+build_src_filter = ${rak3x72.build_src_filter}
+  +<../examples/simple_sensor>
+
+[env:RAK_3x72_companion_radio_usb]
+extends = rak3x72
+build_flags = ${rak3x72.build_flags}
+;  -D FORMAT_FS=true
+  -D MAX_CONTACTS=100
+  -D MAX_GROUP_CHANNELS=8
+build_src_filter = ${rak3x72.build_src_filter}
+  +<../examples/companion_radio/*.cpp>
+lib_deps = ${rak3x72.lib_deps}
+  densaugeo/base64 @ ~1.4.0
+
+[env:RAK_3x72_kiss_modem]
+extends = rak3x72
+build_src_filter = ${rak3x72.build_src_filter}
+  +<../examples/kiss_modem/>

variants/rak3x72/target.cpp

@@ -0,0 +1,61 @@
+#include <Arduino.h>
+#include "target.h"
+#include <helpers/ArduinoHelpers.h>
+
+RAK3x72Board board;
+
+RADIO_CLASS radio = new STM32WLx_Module();
+
+WRAPPER_CLASS radio_driver(radio, board);
+
+static const uint32_t rfswitch_pins[] = {LORAWAN_RFSWITCH_PINS,  RADIOLIB_NC, RADIOLIB_NC, RADIOLIB_NC};
+static const Module::RfSwitchMode_t rfswitch_table[] = {
+  {STM32WLx::MODE_IDLE,  {LOW,  LOW}},
+  {STM32WLx::MODE_RX,    {HIGH, LOW}},
+  {STM32WLx::MODE_TX_LP, {LOW, HIGH}},
+  {STM32WLx::MODE_TX_HP, {LOW, HIGH}},
+  END_OF_MODE_TABLE,
+};
+
+VolatileRTCClock rtc_clock;
+SensorManager sensors;
+
+#ifndef LORA_CR
+  #define LORA_CR      5
+#endif
+
+#ifndef STM32WL_TCXO_VOLTAGE
+  // TCXO set to 0 for RAK3172
+  #define STM32WL_TCXO_VOLTAGE 0
+#endif
+
+#ifndef LORA_TX_POWER
+  #define LORA_TX_POWER 22
+#endif
+
+bool radio_init() {
+//  rtc_clock.begin(Wire);
+
+  radio.setRfSwitchTable(rfswitch_pins, rfswitch_table);
+
+  int status = radio.begin(LORA_FREQ, LORA_BW, LORA_SF, LORA_CR, RADIOLIB_SX126X_SYNC_WORD_PRIVATE, LORA_TX_POWER, 16, STM32WL_TCXO_VOLTAGE, 0); 
+
+  if (status != RADIOLIB_ERR_NONE) {
+    Serial.print("ERROR: radio init failed: ");
+    Serial.println(status);
+    return false;  // fail
+  }
+  
+  #ifdef RX_BOOSTED_GAIN
+    radio.setRxBoostedGainMode(RX_BOOSTED_GAIN);
+  #endif
+
+  radio.setCRC(1);
+  
+  return true;  // success
+}
+
+mesh::LocalIdentity radio_new_identity() {
+  RadioNoiseListener rng(radio);
+  return mesh::LocalIdentity(&rng);  // create new random identity
+}

variants/rak3x72/target.h

@@ -0,0 +1,53 @@
+#pragma once
+
+#define RADIOLIB_STATIC_ONLY 1
+#include <RadioLib.h>
+#include <helpers/radiolib/RadioLibWrappers.h>
+#include <helpers/stm32/STM32Board.h>
+#include <helpers/radiolib/CustomSTM32WLxWrapper.h>
+#include <helpers/ArduinoHelpers.h>
+#include <helpers/SensorManager.h>
+
+#define  PIN_VBAT_READ    A0
+#define  ADC_MULTIPLIER   (5 * 1.73 * 1000)
+
+class RAK3x72Board : public STM32Board {
+public:
+    void begin() override {
+        STM32Board::begin();
+        pinMode(PA0, OUTPUT);
+        pinMode(PA1, OUTPUT);
+    }
+
+    const char* getManufacturerName() const override {
+        return "RAK 3x72";
+    }
+
+    uint16_t getBattMilliVolts() override {
+        analogReadResolution(12);
+        uint32_t raw = 0;
+        for (int i=0; i<8;i++) {
+            raw += analogRead(PIN_VBAT_READ);
+        }
+        return ((double)raw) * ADC_MULTIPLIER / 8 / 4096;
+    }
+
+    void setGpio(uint32_t values) override {
+        // set led values
+        digitalWrite(PA0, values & 1);
+        digitalWrite(PA1, (values & 2) >> 1);
+    }
+
+    uint32_t getGpio() override {
+        // get led value
+        return (digitalRead(PA1) << 1) | digitalRead(PA0);
+    }
+};
+
+extern RAK3x72Board board;
+extern WRAPPER_CLASS radio_driver;
+extern VolatileRTCClock rtc_clock;
+extern SensorManager sensors;
+
+bool radio_init();
+mesh::LocalIdentity radio_new_identity();

variants/rak3x72/variant.h

@@ -0,0 +1,5 @@
+#pragma once
+
+#include <variant_RAK3172_MODULE.h>
+
+#undef RNG