Custom I2C/SPI/UART pins for generic variants (#221)

* UART: Add setPins(...) for generic boards (nRF51 and nRF52).

* SPI: Add setPins(...) for generic boards (nRF51 and nRF52).

* Wire (I2C/TWI): Add setPins(...) for generic boards (nRF51 and nRF52).

cores/nRF5/Uart.cpp

@@ -41,6 +41,22 @@ Uart::Uart(NRF_UART_Type *_nrfUart, IRQn_Type _IRQn, uint8_t _pinRX, uint8_t _pi
   uc_hwFlow = 1;
 }
 
+#ifdef ARDUINO_GENERIC
+void Uart::setPins(uint8_t _pinRX, uint8_t _pinTX)
+{
+  uc_pinRX = g_ADigitalPinMap[_pinRX];
+  uc_pinTX = g_ADigitalPinMap[_pinTX];
+}
+
+void Uart::setPins(uint8_t _pinRX, uint8_t _pinTX, uint8_t _pinCTS, uint8_t _pinRTS)
+{
+  uc_pinRX = g_ADigitalPinMap[_pinRX];
+  uc_pinTX = g_ADigitalPinMap[_pinTX];
+  uc_pinCTS = g_ADigitalPinMap[_pinCTS];
+  uc_pinRTS = g_ADigitalPinMap[_pinRTS];
+}
+#endif // ARDUINO_GENERIC
+
 void Uart::begin(unsigned long baudrate)
 {
   begin(baudrate, (uint8_t)SERIAL_8N1);

cores/nRF5/Uart.h

@@ -31,6 +31,10 @@ class Uart : public HardwareSerial
   public:
     Uart(NRF_UART_Type *_nrfUart, IRQn_Type _IRQn, uint8_t _pinRX, uint8_t _pinTX);
     Uart(NRF_UART_Type *_nrfUart, IRQn_Type _IRQn, uint8_t _pinRX, uint8_t _pinTX, uint8_t _pinCTS, uint8_t _pinRTS );
+#ifdef ARDUINO_GENERIC
+    void setPins(uint8_t _pinRX, uint8_t _pinTX);
+    void setPins(uint8_t _pinRX, uint8_t _pinTX, uint8_t _pinCTS, uint8_t _pinRTS);
+#endif // ARDUINO_GENERIC
     void begin(unsigned long baudRate);
     void begin(unsigned long baudrate, uint16_t config);
     void end();

libraries/SPI/SPI.cpp

@@ -44,6 +44,15 @@ SPIClass::SPIClass(NRF_SPI_Type *p_spi, uint8_t uc_pinMISO, uint8_t uc_pinSCK, u
   _bitOrder = SPI_CONFIG_ORDER_MsbFirst;
 }
 
+#ifdef ARDUINO_GENERIC
+void SPIClass::setPins(uint8_t uc_pinMISO, uint8_t uc_pinSCK, uint8_t uc_pinMOSI)
+{
+  _uc_pinMiso = g_ADigitalPinMap[uc_pinMISO];
+  _uc_pinSCK = g_ADigitalPinMap[uc_pinSCK];
+  _uc_pinMosi = g_ADigitalPinMap[uc_pinMOSI];
+}
+#endif // ARDUINO_GENERIC
+
 void SPIClass::begin()
 {
   init();

libraries/SPI/SPI.h

@@ -100,6 +100,9 @@ class SPIClass {
   void attachInterrupt();
   void detachInterrupt();
 
+#ifdef ARDUINO_GENERIC
+  void setPins(uint8_t uc_pinMISO, uint8_t uc_pinSCK, uint8_t uc_pinMOSI);
+#endif // ARDUINO_GENERIC
   void begin();
   void end();
 
@@ -152,4 +155,4 @@ extern SPIClass SPI1;
   #define SPI_CLOCK_DIV128 128
 #endif
 
-#endif
+#endif
\ No newline at end of file

libraries/Wire/Wire.h

@@ -39,6 +39,9 @@ class TwoWire : public Stream
 #else
     TwoWire(NRF_TWI_Type * p_twi, uint8_t pinSDA, uint8_t pinSCL);
 #endif
+#ifdef ARDUINO_GENERIC
+    void setPins(uint8_t pinSDA, uint8_t pinSCL);
+#endif // ARDUINO_GENERIC
     void begin();
 #ifdef NRF52
     void begin(uint8_t);

libraries/Wire/Wire_nRF51.cpp

@@ -39,6 +39,14 @@ TwoWire::TwoWire(NRF_TWI_Type * p_twi, uint8_t pinSDA, uint8_t pinSCL)
   this->suspended = false;
 }
 
+#ifdef ARDUINO_GENERIC
+void TwoWire::setPins(uint8_t pinSDA, uint8_t pinSCL)
+{
+  this->_uc_pinSDA = g_ADigitalPinMap[pinSDA];
+  this->_uc_pinSCL = g_ADigitalPinMap[pinSCL];
+}
+#endif // ARDUINO_GENERIC
+
 void TwoWire::begin(void) {
   //Master Mode
   master = true;

libraries/Wire/Wire_nRF52.cpp

@@ -39,6 +39,14 @@ TwoWire::TwoWire(NRF_TWIM_Type * p_twim, NRF_TWIS_Type * p_twis, IRQn_Type IRQn,
   transmissionBegun = false;
 }
 
+#ifdef ARDUINO_GENERIC
+void TwoWire::setPins(uint8_t pinSDA, uint8_t pinSCL)
+{
+  this->_uc_pinSDA = g_ADigitalPinMap[pinSDA];
+  this->_uc_pinSCL = g_ADigitalPinMap[pinSCL];
+}
+#endif // ARDUINO_GENERIC
+
 void TwoWire::begin(void) {
   //Master Mode
   master = true;