mcu_main.c

单片机串行口的编程使用包括一些具体的设置

#include<reg51.h>

//UART初始化：模式1，8位，9600Bds at 11.059MHz
void InitSerial()
{	
	SCON = 0x50;					  	 // uart in mode 1 (8 bit), REN=1
	TMOD = TMOD | 0x20 ;       // Timer 1 in mode 2 
	TH1  = 0xFD;               // 9600 Bds at 11.059MHz 
	TL1  = 0xFD; 				  	   // 9600 Bds at 11.059MHz
	TR1  = 1; 						     // Timer 1 run
	}
	
void main()
{
	unsigned char temp;
	InitSerial();
	while(1)
	{
		while(!RI);
		RI = 0;
		temp = SBUF;
		TI = 0;
	  	SBUF = temp;
		while(!TI);
		}
	}