51單片機———串口通訊的疑惑

即PC機發(fā)送一串數(shù)據(jù)，51單片機將數(shù)據(jù)反饋回來。使用回車符作為一串字符串的結束標志總結：我是參照郭天祥51單片機寫的，這個程序?qū)懙眠€是有點疑惑，就是下面在接受完數(shù)據(jù)后一定要先將串口中斷關閉（即ES = 0）,然后再進行處理，如果不關閉中斷的話，反饋回PC機的數(shù)據(jù)就是I getn*/#include//#define DEBUG#define u8 unsigned char#define u16 unsigned int#define MAXSIZE 64u8 code table[] = "I get ";u8 flag,index,i,Len;u8 Buff[MAXSIZE];void Configuration(){TMOD = 0x20;TH1 = 0xF3;							//設置波特率為4800TL1 = 0xF3;TR1 = 1;SCON = SCON & (0x3<<6);	SCON = SCON | (0x01<<6) | (1<<4);	//設置串口工作模式和使能接受PCON = PCON | (1<<7);				//設置波特率加倍，即最終的波特率為9600EA = 1;								//開啟中斷ES = 1;}void Recieve() interrupt 4{RI = 0;Buff[index++] = SBUF;#ifdef DEBUGSBUF = Buff[index-1];while(!TI);TI = 0;#endifif (Buff[index-1]==n )			//這一串數(shù)據(jù)結束{Len = index;index = 0;flag = 1;	}}void main(){Configuration();while(1){if (1==flag)					//判斷是否有數(shù)據(jù)到來{ES = 0;						//要關閉中斷，否則程序有問題for(i=0;i<6;i++){SBUF = table[i];while(!TI);				//等待數(shù)據(jù)發(fā)送完畢TI = 0;}for(i=0;i
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