added support for RP2040 (Raspberry Pi Pico) (#145)

src/knx/bits.h

@@ -5,7 +5,7 @@
 
 #if defined(__linux__)
 #include <arpa/inet.h>
-#elif defined(ARDUINO_ARCH_SAMD) || defined(ARDUINO_ARCH_STM32) || defined (DeviceFamily_CC13X0)
+#elif defined(ARDUINO_ARCH_SAMD) || defined(ARDUINO_ARCH_RP2040) || defined(ARDUINO_ARCH_STM32) || defined (DeviceFamily_CC13X0)
 #define getbyte(x,n) (*(((uint8_t*)&(x))+n))
 #define htons(x)  ( (getbyte(x,0)<<8) | getbyte(x,1) ) 
 #define htonl(x) ( (getbyte(x,0)<<24) | (getbyte(x,1)<<16) | (getbyte(x,2)<<8) | getbyte(x,3) )
@@ -25,7 +25,7 @@
 #define ABS(x)    ((x > 0) ? (x) : (-x))
 #endif
 
-#if defined(ARDUINO_ARCH_SAMD) || defined(ARDUINO_ARCH_STM32)
+#if defined(ARDUINO_ARCH_SAMD) || defined(ARDUINO_ARCH_RP2040) || defined(ARDUINO_ARCH_STM32)
 #include <Arduino.h>
 #elif defined(ARDUINO_ARCH_ESP8266)
 #include <Arduino.h>

src/knx/group_object.h

@@ -20,7 +20,7 @@ enum ComFlag
 class GroupObject;
 
 #ifndef HAS_FUNCTIONAL
-# if defined(__linux__) || defined(ARDUINO_ARCH_ESP32) || defined(ARDUINO_ARCH_STM32) || defined (ARDUINO_ARCH_SAMD)
+# if defined(__linux__) || defined(ARDUINO_ARCH_ESP32) || defined(ARDUINO_ARCH_STM32) || defined (ARDUINO_ARCH_SAMD) || defined (ARDUINO_ARCH_RP2040)
 #  define HAS_FUNCTIONAL    1
 # else
 #  define HAS_FUNCTIONAL   0

src/knx_facade.cpp

@@ -7,7 +7,8 @@
     #if (defined(ARDUINO_ARCH_STM32) || \
         defined(ARDUINO_ARCH_ESP32) || \
         defined(ARDUINO_ARCH_ESP8266) || \
-        defined(ARDUINO_ARCH_SAMD))
+        defined(ARDUINO_ARCH_SAMD) || \
+		defined(ARDUINO_ARCH_RP2040))
 
         // Only ESP8266 and ESP32 have this define. For all other platforms this is just empty.
         #ifndef ICACHE_RAM_ATTR
@@ -35,6 +36,17 @@
         #else
             #error "Mask version not supported on ARDUINO_ARCH_SAMD"
         #endif
+    #elif defined(ARDUINO_ARCH_RP2040)
+        // predefined global instance for TP or RF or TP/RF coupler
+        #if MASK_VERSION == 0x07B0
+            KnxFacade<RP2040ArduinoPlatform, Bau07B0> knx(buttonUp);
+        #elif MASK_VERSION == 0x27B0
+            KnxFacade<RP2040ArduinoPlatform, Bau27B0> knx(buttonUp);
+        #elif MASK_VERSION == 0x2920
+            KnxFacade<RP2040ArduinoPlatform, Bau2920> knx(buttonUp);
+        #else
+            #error "Mask version not supported on ARDUINO_ARCH_RP2040"
+        #endif
 
     #elif defined(ARDUINO_ARCH_ESP8266)
         // predefined global instance for TP or IP or TP/IP coupler

src/knx_facade.h

@@ -17,6 +17,11 @@
     #ifndef KNX_NO_AUTOMATIC_GLOBAL_INSTANCE
         void buttonUp();
     #endif
+#elif defined(ARDUINO_ARCH_RP2040)
+    #include "rp2040_arduino_platform.h"
+    #ifndef KNX_NO_AUTOMATIC_GLOBAL_INSTANCE
+        void buttonUp();
+    #endif
 #elif defined(ARDUINO_ARCH_ESP8266)
     #include "esp_platform.h"
     #ifndef KNX_NO_AUTOMATIC_GLOBAL_INSTANCE
@@ -387,6 +392,17 @@ template <class P, class B> class KnxFacade : private SaveRestore
         #else
             #error "Mask version not supported on ARDUINO_ARCH_SAMD"
         #endif
+    #elif defined(ARDUINO_ARCH_RP2040)
+        // predefined global instance for TP or RF or TP/RF coupler
+        #if MASK_VERSION == 0x07B0
+            extern KnxFacade<RP2040ArduinoPlatform, Bau07B0> knx;
+        #elif MASK_VERSION == 0x27B0
+            extern KnxFacade<RP2040ArduinoPlatform, Bau27B0> knx;
+        #elif MASK_VERSION == 0x2920
+            extern KnxFacade<RP2040ArduinoPlatform, Bau2920> knx;
+        #else
+            #error "Mask version not supported on ARDUINO_ARCH_RP2040"
+        #endif
     #elif defined(ARDUINO_ARCH_ESP8266)
         // predefined global instance for TP or IP or TP/IP coupler
         #if MASK_VERSION == 0x07B0

src/rp2040_arduino_platform.cpp

@@ -0,0 +1,82 @@
+/*-----------------------------------------------------
+
+Plattform for Raspberry Pi Pico and other RP2040 boards
+
+made to work with arduino-pico - "Raspberry Pi Pico Arduino core, for all RP2040 boards"
+by Earl E. Philhower III https://github.com/earlephilhower/arduino-pico
+tested with V1.9.1
+
+by SirSydom <com@sirsydom.de> 2021
+
+A maximum of 4kB emulated EEPROM is supported.
+For more, use or own emulation (maybe with littlefs)
+
+----------------------------------------------------*/
+
+#include "rp2040_arduino_platform.h"
+
+#ifdef ARDUINO_ARCH_RP2040
+#include <knx/bits.h>
+
+#include <Arduino.h>
+
+//Pi Pico specific libs
+#include <EEPROM.h>             // EEPROM emulation in flash, part of Earl E Philhowers Pi Pico Arduino support 
+#include <pico/unique_id.h>     // from Pico SDK
+#include <hardware/watchdog.h>  // from Pico SDK
+
+
+RP2040ArduinoPlatform::RP2040ArduinoPlatform()
+#ifndef KNX_NO_DEFAULT_UART
+    : ArduinoPlatform(&Serial1)
+#endif
+{
+}
+
+RP2040ArduinoPlatform::RP2040ArduinoPlatform( HardwareSerial* s) : ArduinoPlatform(s)
+{
+}
+
+uint32_t RP2040ArduinoPlatform::uniqueSerialNumber()
+{
+    pico_unique_board_id_t id;      // 64Bit unique serial number from the QSPI flash
+    pico_get_unique_board_id(&id);
+
+    // use lower 4 byte and convert to unit32_t
+    uint32_t uid = ((uint32_t)(id.id[4]) << 24) | ((uint32_t)(id.id[5]) << 16) | ((uint32_t)(id.id[6]) << 8) | (uint32_t)(id.id[7]);
+
+    return uid;
+}
+
+void RP2040ArduinoPlatform::restart()
+{
+    println("restart");
+    watchdog_reboot(0,0,0);
+}
+
+uint8_t * RP2040ArduinoPlatform::getEepromBuffer(uint16_t size)
+{
+    if(size > 4096)
+    {
+        println("KNX_FLASH_SIZE to big for EEPROM emulation (max. 4kB)");
+        fatalError();
+    }
+    
+    uint8_t * eepromptr = EEPROM.getDataPtr();
+
+    if(eepromptr == nullptr)
+    {
+        EEPROM.begin(4096);
+        eepromptr = EEPROM.getDataPtr();
+    }
+    
+    return eepromptr;
+}
+
+void RP2040ArduinoPlatform::commitToEeprom()
+{
+    EEPROM.commit();
+}
+#endif
+
+

src/rp2040_arduino_platform.h

@@ -0,0 +1,21 @@
+#include "arduino_platform.h"
+
+#include "Arduino.h"
+
+#ifdef ARDUINO_ARCH_RP2040
+
+class RP2040ArduinoPlatform : public ArduinoPlatform
+{
+public:
+    RP2040ArduinoPlatform();
+    RP2040ArduinoPlatform( HardwareSerial* s);
+
+    // unique serial number
+    uint32_t uniqueSerialNumber() override;
+
+    void restart();
+    uint8_t* getEepromBuffer(uint16_t size);
+    void commitToEeprom();
+};
+
+#endif