Added RP2040-LoRA target (meshtastic#3195)

.github/workflows/main_matrix.yml

@@ -129,6 +129,7 @@ jobs:
           - board: picow
           - board: rak11310
           - board: senselora_rp2040
+          - board: rp2040-lora
     uses: ./.github/workflows/build_rpi2040.yml
     with:
       board: ${{ matrix.board }}

src/platform/rp2040/architecture.h

@@ -27,4 +27,6 @@
 #define HW_VENDOR meshtastic_HardwareModel_RAK11310
 #elif defined(SENSELORA_RP2040)
 #define HW_VENDOR meshtastic_HardwareModel_SENSELORA_RP2040
+#elif defined(RP2040_LORA)
+#define HW_VENDOR meshtastic_HardwareModel_RP2040_LORA
 #endif

variants/rp2040-lora/platformio.ini

@@ -0,0 +1,16 @@
+[env:rp2040-lora]
+extends = rp2040_base
+board = rpipico
+upload_protocol = picotool
+
+# add our variants files to the include and src paths
+build_flags = ${rp2040_base.build_flags} 
+  -DRP2040_LORA
+  -Ivariants/rp2040-lora
+  -DDEBUG_RP2040_PORT=Serial
+  -DHW_SPI1_DEVICE
+  -L "${platformio.libdeps_dir}/${this.__env__}/BSEC2 Software Library/src/cortex-m0plus"
+lib_deps =
+  ${rp2040_base.lib_deps}
+debug_build_flags = ${rp2040_base.build_flags}
+debug_tool = cmsis-dap ; for e.g. Picotool

variants/rp2040-lora/variant.h

@@ -0,0 +1,54 @@
+// #define RADIOLIB_CUSTOM_ARDUINO 1
+// #define RADIOLIB_TONE_UNSUPPORTED 1
+// #define RADIOLIB_SOFTWARE_SERIAL_UNSUPPORTED 1
+
+#define ARDUINO_ARCH_AVR
+
+// #define USE_SH1106 1
+
+// default I2C pins:
+// SDA = 4
+// SCL = 5
+
+// Recommended pins for SerialModule:
+// txd = 8
+// rxd = 9
+
+#define EXT_NOTIFY_OUT 22
+#define BUTTON_PIN 17
+
+#define LED_PIN PIN_LED
+
+// #define BATTERY_PIN 26
+//  ratio of voltage divider = 3.0 (R17=200k, R18=100k)
+// #define ADC_MULTIPLIER 3.1 // 3.0 + a bit for being optimistic
+
+#define USE_SX1262
+
+#undef LORA_SCK
+#undef LORA_MISO
+#undef LORA_MOSI
+#undef LORA_CS
+
+// https://www.waveshare.com/rp2040-lora.htm
+// https://www.waveshare.com/img/devkit/RP2040-LoRa-HF/RP2040-LoRa-HF-details-11.jpg
+#define LORA_SCK 14  // 10
+#define LORA_MISO 24 // 12
+#define LORA_MOSI 15 // 11
+#define LORA_CS 13   // 3
+
+#define LORA_DIO0 RADIOLIB_NC
+#define LORA_RESET 23 // 15
+#define LORA_DIO1 16  // 20
+#define LORA_DIO2 18  // 2
+#define LORA_DIO3 RADIOLIB_NC
+#define LORA_DIO4 17
+
+#ifdef USE_SX1262
+#define SX126X_CS LORA_CS
+#define SX126X_DIO1 LORA_DIO1
+#define SX126X_BUSY LORA_DIO2
+#define SX126X_RESET LORA_RESET
+#define SX126X_DIO2_AS_RF_SWITCH
+// #define SX126X_DIO3_TCXO_VOLTAGE 1.8
+#endif