slave_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>

#define  ADDR  0x01
#define  ACK   0xff

unsigned char Dat[]={0,0,0,0,0,0,0,0};

//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,i;
	InitSerial();
	while(1)
	{
		while(!RI);
		RI = 0;
		temp = SBUF;
		if(temp == ADDR)
		{
			TI = 0;
	  		SBUF = ACK;
			while(!TI);
			}
		for(i=0;i<8;i++)
		{
			while(!RI);
			RI = 0;
			Dat[i] = SBUF;
				}
		}
	}