uart.h

这是我大学4年来做过的竞赛以及老师的科研项目所积累下来的c51源代码

//UART.H代码
#include "REG51.h"
#define	BAUD_RATE	2400
#define	RELOAD(TIMER,SVALUE)	TIMER+=SVALUE+1
sbit	tTXD=P3^7;
sbit	rRXD=P3^2;

bit	tTI;
bit	rRI;

data	unsigned char rSBUF;
data	unsigned char tSBUF;

data	unsigned char rSBUF0;
data	unsigned char RxdCnt;
data	unsigned char rSmpCnt;

data	unsigned char TxdCnt;
data	unsigned char tSmpCnt;

void	SimuUARTinit(void)
{
	tTI=1;
	tTXD=1;
	rRXD=1;

	TMOD&=0xf0;
	TMOD|=0x03;
	ET0=1;
	ET1=1;
	TR0=1;
	IT0=1;
	EX0=1;
	TR1=1;
	EA=1;
}