uart.c

TFT-LCD Atmega128 Source Code

#include "config.h"



void UART_init()
{

	UBRR1L = 15;	// 57600bps at 14.7456MHz
	UCSR1B = 0x18;
}


void UART_send_byte(unsigned char data)
{
	while(!(UCSR1A & 0x20));
	UDR1 = data;

}

unsigned char UART_recv_byte()
{
	while(!(UCSR1A & 0x80));
	return UDR1;
}

void UART_puts(char *pStr)
{
	while(*pStr)
	{
		switch(*pStr)
		{
		case LF:
		case CR:
			UART_send_byte(LF); UART_send_byte(CR);
			pStr++;
			break;
		default:
			UART_send_byte(*pStr++);
		}
	};
}

void UART_put_hex(unsigned char hexval)
{
	unsigned char temp1, temp2;

	temp1 = hexval;
	temp1 >>= 4;

	if ( temp1 >= 0 && temp1 <= 9 )
		UART_send_byte(temp1 + '0');
	else
	{
		temp2 = temp1 - 10 + 'A';
		UART_send_byte(temp2);
	}

	temp1 = hexval & 0x0F;

	if ( temp1 >= 0 && temp1 <= 9 )
		UART_send_byte(temp1 + '0');
	else
	{
		temp2 = temp1 - 10 + 'A';
		UART_send_byte(temp2);
	}
}