Added support for Raspberry PI (#432)

README.md

@@ -69,6 +69,7 @@ SX127x, RFM9x, SX126x, RF69, SX1231, CC1101, nRF24L01, RFM2x, Si443x and SX128x
 
 * __Raspberry Pi__
   * [__RP2040__](https://github.com/arduino/ArduinoCore-mbed) - Raspberry Pi Pico and Arduino Nano RP2040 Connect
+  * [__Raspberry Pi__](https://github.com/me-no-dev/RasPiArduino) - Arduino framework for RaspberryPI
 
 * __Heltec__
   * [__CubeCell__](https://github.com/HelTecAutomation/CubeCell-Arduino) - ASR650X series (CubeCell-Board, CubeCell-Capsule, CubeCell-Module etc.)

src/BuildOpt.h

@@ -734,6 +734,60 @@
     #undef yield
     #endif
 
+#elif defined(RASPI)
+    // RaspiDuino framework (https://github.com/me-no-dev/RasPiArduino)
+    #define RADIOLIB_PLATFORM                           "RasPiArduino"
+    #define RADIOLIB_PIN_TYPE                           uint8_t
+    #define RADIOLIB_PIN_MODE                           uint8_t
+    #define RADIOLIB_PIN_STATUS                         uint8_t
+    #define RADIOLIB_INTERRUPT_STATUS                   RADIOLIB_PIN_STATUS
+    #define RADIOLIB_DIGITAL_PIN_TO_INTERRUPT(p)        digitalPinToInterrupt(p)
+    #define RADIOLIB_NC                                 (0xFF)
+    #define RADIOLIB_DEFAULT_SPI                        SPI
+    #define RADIOLIB_DEFAULT_SPI_SETTINGS               SPISettings(2000000, MSBFIRST, SPI_MODE0)
+    #define RADIOLIB_NONVOLATILE                        PROGMEM
+    #define RADIOLIB_NONVOLATILE_READ_BYTE(addr)        pgm_read_byte(addr)
+    #define RADIOLIB_TYPE_ALIAS(type, alias)            using alias = type;
+
+    // Arduino API callbacks
+    #define RADIOLIB_CB_ARGS_PIN_MODE                   (void, pinMode, uint8_t pin, uint8_t mode)
+    #define RADIOLIB_CB_ARGS_DIGITAL_WRITE              (void, digitalWrite, uint8_t pin, uint8_t value)
+    #define RADIOLIB_CB_ARGS_DIGITAL_READ               (int, digitalRead, uint8_t pin)
+    #define RADIOLIB_CB_ARGS_TONE                       (void, tone, uint8_t _pin, unsigned int frequency, unsigned long duration)
+    #define RADIOLIB_CB_ARGS_NO_TONE                    (void, noTone, uint8_t _pin)
+    #define RADIOLIB_CB_ARGS_ATTACH_INTERRUPT           (void, attachInterrupt, uint8_t interruptNum, void (*userFunc)(void), int mode)
+    #define RADIOLIB_CB_ARGS_DETACH_INTERRUPT           (void, detachInterrupt, uint8_t interruptNum)
+    #define RADIOLIB_CB_ARGS_YIELD                      (void, yield, void)
+    #define RADIOLIB_CB_ARGS_DELAY                      (void, delay, uint32_t ms)
+    #define RADIOLIB_CB_ARGS_DELAY_MICROSECONDS         (void, delayMicroseconds, unsigned int us)
+    #define RADIOLIB_CB_ARGS_MILLIS                     (unsigned long, millis, void)
+    #define RADIOLIB_CB_ARGS_MICROS                     (unsigned long, micros, void)
+    #define RADIOLIB_CB_ARGS_SPI_BEGIN                  (void, SPIbegin, void)
+    #define RADIOLIB_CB_ARGS_SPI_BEGIN_TRANSACTION      (void, SPIbeginTransaction, void)
+    #define RADIOLIB_CB_ARGS_SPI_TRANSFER               (uint8_t, SPItransfer, uint8_t b)
+    #define RADIOLIB_CB_ARGS_SPI_END_TRANSACTION        (void, SPIendTransaction, void)
+    #define RADIOLIB_CB_ARGS_SPI_END                    (void, SPIend, void)
+
+    // let's start off easy - no tone on this platform, that can happen
+    #define RADIOLIB_TONE_UNSUPPORTED
+
+    // hmm, no yield either - weird on something like Raspberry PI, but sure, we can handle it
+    #define RADIOLIB_YIELD_UNSUPPORTED
+
+    // aight, getting to the juicy stuff - PGM_P seems missing, that's the first time
+    #define PGM_P                                       const char *
+
+    // ... and for the grand finale, we have millis() and micros() DEFINED AS MACROS!
+    #if defined(millis)
+    #undef millis
+    inline unsigned long millis() { return((unsigned long)(STCV / 1000)); };
+    #endif
+
+    #if defined(micros)
+    #undef micros
+    inline unsigned long micros() { return((unsigned long)(STCV)); };
+    #endif
+
   #else
     // other Arduino platforms not covered by the above list - this may or may not work
     #define RADIOLIB_PLATFORM                           "Unknown Arduino"