Merge pull request #20 from LeGeek/zero

Fix UART baudrate and EDBG.

cores/arduino/SERCOM.cpp

@@ -17,12 +17,11 @@ SERCOM::SERCOM(Sercom* s)
  *	===== Sercom UART
  *	=========================
 */
-
 void SERCOM::initUART(SercomUartMode mode, SercomUartSampleRate sampleRate, uint32_t baudrate)
 {		
 	resetUART();
 	initClock();
-	
+	initNVIC();
 	
 	//Setting the CTRLA register
 	sercom->USART.CTRLA.reg =	SERCOM_USART_CTRLA_MODE(mode) |
@@ -32,12 +31,10 @@ void SERCOM::initUART(SercomUartMode mode, SercomUartSampleRate sampleRate, uint
 	sercom->USART.INTENSET.reg =	SERCOM_USART_INTENSET_RXC |  //Received complete
 									SERCOM_USART_INTENSET_ERROR; //All others errors
 									
-	NVIC_EnableIRQ(SERCOM0_IRQn);
-	NVIC_SetPriority (SERCOM0_IRQn, (1<<__NVIC_PRIO_BITS) - 1);  /* set Priority for Systick Interrupt */
 	
 	if(mode == UART_INT_CLOCK)
 	{
-		uint32_t sampleRateValue;	
+		uint16_t sampleRateValue;	
 		
 		if(sampleRate == SAMPLE_RATE_x16)
 			sampleRateValue = 16;
@@ -47,13 +44,9 @@ void SERCOM::initUART(SercomUartMode mode, SercomUartSampleRate sampleRate, uint
 			sampleRateValue = 3;
 		
 		//Asynchronous arithmetic mode
-		//sercom->USART.BAUD.reg = 65535 * ( 1 - sampleRateValue * division(baudrate,SERCOM_FREQ_REF));
-		uint16_t tmpBaud = (baudrate / SERCOM_FREQ_REF);
-		tmpBaud = ( 1 - sampleRateValue * tmpBaud);
-		tmpBaud = (65535ul) * tmpBaud;
+		//65535 * ( 1 - sampleRateValue * baudrate / SERCOM_FREQ_REF);
+		sercom->USART.BAUD.reg = 65535.0 * ( 1.0 - (float)(sampleRateValue) * (float)(baudrate) / (float)(SERCOM_FREQ_REF));
 		
-		tmpBaud = 63019;
-		sercom->USART.BAUD.reg = tmpBaud;
 	}
 }
 void SERCOM::initFrame(SercomUartCharSize charSize, SercomDataOrder dataOrder, SercomParityMode parityMode, SercomNumberStopBit nbStopBits)
@@ -303,42 +296,7 @@ bool SERCOM::isReceiveCompleteSPI()
 
 uint8_t SERCOM::calculateBaudrateSynchronous(uint32_t baudrate)
 {
-	return division(SERCOM_FREQ_REF, (2 * baudrate)) - 1;
-}
-
-
-uint32_t SERCOM::division(uint32_t dividend, uint32_t divisor)
-{
-	//// division WITHOUT division operator
-	//
-    //uint32_t denom = divisor;
-    //uint32_t current = 1;
-    //uint32_t answer = 0;
-//
-    //if ( denom > dividend) 
-        //return 0;
-//
-    //if ( denom == dividend)
-        //return 1;
-//
-    //while (denom <= dividend) {
-        //denom <<= 1;
-        //current <<= 1;
-    //}
-//
-    //denom >>= 1;
-    //current >>= 1;
-//
-    //while (current!=0) {
-        //if ( dividend >= denom) {
-            //dividend -= denom;
-            //answer |= current;
-        //}
-        //current >>= 1;
-        //denom >>= 1;
-    //}
-	//
-    //return answer;
+	return SERCOM_FREQ_REF / (2 * baudrate) - 1;
 }
 
 
@@ -537,7 +495,7 @@ uint8_t SERCOM::readDataWIRE()
 
 void SERCOM::initClock()
 {
-	uint8_t clockId;
+	uint8_t clockId = 0;
 	
 	if(sercom == SERCOM0)
 	{
@@ -576,6 +534,39 @@ void SERCOM::initClock()
 	}
 }
 
+void SERCOM::initNVIC()
+{
+		IRQn_Type nvicID;
+		
+		if(sercom == SERCOM0)
+		{
+			nvicID = SERCOM0_IRQn;
+		}
+		else if(sercom == SERCOM1)
+		{
+			nvicID = SERCOM1_IRQn;
+		}
+		else if(sercom == SERCOM2)
+		{
+			nvicID = SERCOM2_IRQn;
+		}
+		else if(sercom == SERCOM3)
+		{
+			nvicID = SERCOM3_IRQn;
+		}
+		else if(sercom == SERCOM4)
+		{
+			nvicID = SERCOM4_IRQn;
+		}
+		else if(sercom == SERCOM5)
+		{
+			nvicID = SERCOM5_IRQn;
+		}
+		
+	NVIC_EnableIRQ(nvicID);
+	NVIC_SetPriority (nvicID, (1<<__NVIC_PRIO_BITS) - 1);  /* set Priority for Systick Interrupt */
+}
+
 /*	=========================
  *	===== SERCOM DEFINITION
  *	=========================

cores/arduino/SERCOM.h

@@ -199,6 +199,7 @@ class SERCOM
 		uint8_t calculateBaudrateSynchronous(uint32_t baudrate);
 		uint32_t division(uint32_t dividend, uint32_t divisor);
 		void initClock();
+		void initNVIC();
 };
 
 #endif

cores/arduino/Uart.cpp

 #include "Uart.h"
 
 
-Uart::Uart(SERCOM *sercom)
+Uart::Uart(SERCOM *s, uint8_t pinRX, uint8_t pinTX)
 {
-	this->sercom = sercom;
-	pinPeripheral(0, PIO_SERCOM);
-	pinPeripheral(1, PIO_SERCOM);
+	sercom = s;
+	if(sercom == SERCOM::sercom0)
+	{
+		pinPeripheral(pinRX, g_APinDescription[pinRX].ulPinType);
+		pinPeripheral(pinTX, g_APinDescription[pinTX].ulPinType);	
+	}
+	else if(sercom == SERCOM::sercom5)
+	{
+		pinPeripheral(pinRX, g_APinDescription[pinRX].ulPinType);
+		pinPeripheral(pinTX, g_APinDescription[pinTX].ulPinType);
+	}
 }
 
 void Uart::begin(unsigned long baudrate)
 {
-	begin(baudrate, SERIAL_8N1);
+	begin(baudrate, (uint8_t)SERIAL_8N1);
 }
 
 void Uart::begin(unsigned long baudrate, uint8_t config)
@@ -132,7 +140,8 @@ SercomParityMode Uart::extractParity(uint8_t config)
 	}
 }
 
-Uart Serial = Uart(SERCOM::sercom0);
+Uart Serial = Uart(SERCOM::sercom0, 0, 1);
+Uart Serial5 = Uart(SERCOM::sercom5, 36, 35);
 
 void SERCOM0_Handler()
 {
@@ -140,5 +149,5 @@ void SERCOM0_Handler()
 }
 void SERCOM5_Handler()
 {
-	Serial.IrqHandler();
+	Serial5.IrqHandler();
 }

cores/arduino/Uart.h

@@ -13,7 +13,7 @@
 class Uart : public HardwareSerial
 {
 	public:
-		Uart(SERCOM *sercom);
+		Uart(SERCOM *s, uint8_t pinRX, uint8_t pinTX);
 		void begin(unsigned long baudRate);
 		void begin(unsigned long baudrate, uint8_t config);
 		void end();
@@ -37,6 +37,7 @@ class Uart : public HardwareSerial
 		SercomParityMode extractParity(uint8_t config);
 };
 extern Uart Serial;
+extern Uart Serial5;
 
 
 #endif

libraries/SPI/SPI.cpp

@@ -18,7 +18,7 @@ SPIClass::SPIClass(SERCOM *s)
 void SPIClass::begin() {
 	// Default speed set to 4Mhz, SPI mode set to MODE 0 and Bit order set to MSB first.
 	sercom->initSPI(SPI_PAD_2_SCK_3, SERCOM_RX_PAD_0, SPI_CHAR_SIZE_8_BITS, MSB_FIRST);
-	sercom->initClock(SERCOM_SPI_MODE_0, 4000000);
+	sercom->initSPIClock(SERCOM_SPI_MODE_0, 4000000);
 }
 
 void SPIClass::end() {
@@ -86,6 +86,4 @@ void SPIClass::detachInterrupt() {
 	// Should be disableInterrupt()
 }
 
-#if SPI_INTERFACES_COUNT > 0
 SPIClass SPI(SERCOM::sercom4);
-#endif