Added alternate pin muxing for UART1

Author: Revisore

hardware/lm4f/cores/lm4f/HardwareSerial.cpp

@@ -48,7 +48,6 @@
 #include "driverlib/uart.h"
 #include "HardwareSerial.h"
 
-
 #define TX_BUFFER_EMPTY    (txReadIndex == txWriteIndex)
 #define TX_BUFFER_FULL     (((txWriteIndex + 1) % SERIAL_BUFFER_SIZE) == txReadIndex)
 
@@ -87,7 +86,7 @@ static const unsigned long g_ulUARTPeriph[8] =
 };
 //*****************************************************************************
 //
-// The list of UART gpio configurations.
+// The list of UART GPIO configurations.
 //
 //*****************************************************************************
 static const unsigned long g_ulUARTConfig[8][2] =
@@ -104,11 +103,6 @@ static const unsigned long g_ulUARTPort[8] =
 	GPIO_PORTC_BASE, GPIO_PORTE_BASE, GPIO_PORTD_BASE, GPIO_PORTE_BASE
 };
 
-//*****************************************************************************
-//
-// The list of i2c gpio configurations.
-//
-//*****************************************************************************
 static const unsigned long g_ulUARTPins[8] =
 {
     GPIO_PIN_0 | GPIO_PIN_1, GPIO_PIN_4 | GPIO_PIN_5,
@@ -233,6 +227,23 @@ HardwareSerial::setModule(unsigned long module)
 	begin(baudRate);
 
 }
+void 
+HardwareSerial::setPins(unsigned long pins)
+{
+	if(pins == UART1_PORTB)
+	{
+		ROM_GPIOPinConfigure(GPIO_PB0_U1RX);
+		ROM_GPIOPinConfigure(GPIO_PB1_U1TX);
+		ROM_GPIOPinTypeUART(GPIO_PORTB_BASE, GPIO_PIN_0 | GPIO_PIN_1);
+	}
+	else
+	{
+		//Default UART1 Pin Muxing
+		ROM_GPIOPinConfigure(g_ulUARTConfig[1][0]);
+		ROM_GPIOPinConfigure(g_ulUARTConfig[1][1]);
+		ROM_GPIOPinTypeUART(g_ulUARTPort[1], g_ulUARTPins[1]);
+	}
+}
 
 void HardwareSerial::end()
 {

hardware/lm4f/cores/lm4f/HardwareSerial.h

@@ -33,6 +33,10 @@
 #include "Stream.h"
 
 #define SERIAL_BUFFER_SIZE     1024
+
+#define UART1_PORTB	0 
+#define UART1_PORTC	1
+
 class HardwareSerial : public Stream
 {
 
@@ -53,6 +57,7 @@ class HardwareSerial : public Stream
 		HardwareSerial(unsigned long);
 		void begin(unsigned long);
 		void setModule(unsigned long);
+		void setPins(unsigned long);
 		void end(void);
 		virtual int available(void);
 		virtual int peek(void);