uart.c

#include "uart.h"

void UART_SetBaudRate(uint32_t v_baudRate_u32)
{
	uint16_t RegValue;

	if((v_baudRate_u32 >= C_MinBaudRate_U32) && (v_baudRate_u32<=C_MaxBaudRate_U32))
	{
		/* Check if the requested baudate is within range,
	     If yes then calculate the value to be loaded into baud rate generator. */
		RegValue = M_GetBaudRateGeneratorValue(v_baudRate_u32);
	}
	else
	{
		/*	 Invalid baudrate requested, hence set it to default baudrate of 9600 */
		RegValue = M_GetBaudRateGeneratorValue(9600);
	}

	UBRRL = util_ExtractByte0to8(RegValue);
	UBRRH = util_ExtractByte8to16(RegValue);
}

void UART_Init(uint32_t v_baudRate_u32)
{
	UCSRB= (1<<RXEN) | (1<<TXEN);                  // Enable Receiver and Transmitter
	UCSRC= (1<<URSEL) | (1<<UCSZ1) | (1<<UCSZ0);   // Asynchronous mode 8-bit data and 1-stop bit
	UCSRA= 0x00;                                   // Clear the UASRT status register
	UART_SetBaudRate(v_baudRate_u32);
}

char UART_RxChar(void)
{
	while(util_IsBitCleared(UCSRA,RXC));  // Wait till the data is received
	return(UDR);                          // return the received char
}

void UART_TxChar(char v_uartData_u8)
{
	while(util_IsBitCleared(UCSRA,UDRE)); // Wait till Transmitter(UDR) register becomes Empty
	UDR =v_uartData_u8;                              // Load the data to be transmitted
}