Test commit

1 files changed, 84 insertions, 0 deletions

diff --git a/src/c/hardware/avr/uart/u8AVRUARTSetups.c b/src/c/hardware/avr/uart/u8AVRUARTSetups.c
new file mode 100644
index 0000000..f311500
--- /dev/null
+++ b/src/c/hardware/avr/uart/u8AVRUARTSetups.c
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+// Function to initialise uart interface of AVR
+//
+// Calling Sequence
+//     u8AVRUARTSetups(uint8 mode, uint8 baudrate, uint8 stopbits, uint8 parity)
+//
+// Parameters
+//     mode : Mode of usart interface (0-Normal mode, 1-Double speed mode, 
+//							2-Synchronous master mode)
+//     baudrate : Baudrate for communication. Refer AVRPeripheralUART.h 
+//							for available options) 
+//     stopbits : No. of stopbits (0-1) for stopbits 1 and 2 resp.
+//	   parity: set parity bit. (0-disabled, 1-Even parity, 2-Odd parity)	
+//
+//
+// Description
+//	   This function initialises uart interface for AVR. Available modes are 
+//	   Normal mode (0), Double speed mode (1), Synchronous master mode(2). 'baudrate' 
+//	   decides baudrate for communication. For baudrate settings, variable 
+//	   'XTAL_FREQUENCY' is required. 'stopbits' sets no of stopbits for data 
+//	   packet. 0 for 1 stopbit and 1 for 2 stopbits. 'parity' decides parity bit
+//	   for communication. 0 for disabling parity bit, 1 for even parity and 2 
+//	   for odd parity.  	     
+//
+// Authors
+//     Siddhesh Wani
+//
+
+#include "AVRPeripheralUART.h"
+
+uint8 u8AVRUARTSetups(uint8 mode, uint8 baudrate, uint8 stopbits, uint8 parity)
+{
+	switch (mode) //According to mode set bits UMSEL and U2X
+	{
+		case 0: //Normal mode
+				UCSRC &= ~(1<<6); //Clear bit 6 UMSEL  
+				break;
+
+		case 1: //Double speed mode
+				UCSRC &= ~(1<<6); //Clear bit 6 UMSEL
+				break;
+
+		case 2: //Synchronous master mode
+				UCSRC |= (1<<6);  //Set bit 6 UMSEL  
+				break;
+	}
+    
+	if(stopbits == 0)
+	{   // 1 stopbit
+		UCSRC &= ~(1<<3);
+	}
+	else 
+	{   // 2 stopbits
+		UCSRC |= (1<<3);
+	}
+
+	//Set parity bit settings
+	switch(parity)
+	{
+		case 0: // Parity disabled
+				UCSRC &= ~(3<<4);	//UPM1:0=0
+				break;
+		case 1:// Even parity
+				UCSRC |= (1<<5);    //UPM1:0 = 2
+				UCSRC &= ~(1<<4);
+				break;
+		case 2:// Odd parity
+				UCSRC |= (1<<5);    //UPM1:1 = 3
+				UCSRC |= (1<<4);
+				break;
+	}
+
+	//Set baud rate
+	# define BAUD baudrate
+	#include "util/setbaud.h"
+	UBRRH = UBRRH_VALUE;
+	UBRRL = UBRRL_VALUE;
+	#if USE_2X
+	UCSRA |= (1 << U2X);
+	#else
+	UCSRA &= ~(1 << U2X);
+	#endif
+    return 0;
+}
+