uart.c

基于S3C2410的xmodem协议实现

#include "config.h"

void sio_init( )
{//初始化UART
	GPHCON |= 0x16faaa;		//GPH2,GPH3 used as TXD0,RXD0
	GPHUP	 = 0x7ff;		//GPH2,GPH3内部上拉

	ULCON0	 = 0x03;		//8N1	
	UCON0	 = 0x05;		//查询方式
	UFCON0 = 0x00;		//不使用FIFO
	UMCON0 = 0x00;		//不使用流控
	UBRDIV0 = UART_BRD;		//波特率为115200
}

void sio_putc(unsigned char c)
{
	while( !(UTRSTAT0 & TXD0READY) );
	UTXH0 = c;
}

void sio_puts(char *s)
{
  while(*s != 0) {
    sio_putc(*s); 
    s++;
  }
}

unsigned char sio_getc( )
{
	while( !sio_ischar() );
	return URXH0;
}

/* 如果串口有数据，返回1 */
int sio_ischar()
{
	return ( (UTRSTAT0 & RXD0READY) );
}