51單片機學習筆記(六)_串口中斷通信+定時器2串口中斷

#include void DelayMs(unsigned int i);void SerialInit();void SendByte(unsigned char sbyte);void SendString(unsigned char *pstr);void main(void){SerialInit();while(1);	  //注:必需要無限循環(huán)}/*//單片機時鐘周期:11.0592MHz   以時鐘1作為波特率發(fā)生器void SerialInit(){TMOD=0x20;   //設(shè)置T1工作方式為方式2TH1=0xfd; //給定時器高位裝初值TL1=0xfd; //給定時器低位裝初值TR1=1;  //開定時器//以上是設(shè)置波特率SM0=0;  //設(shè)置串口通訊方式為方式1SM1=1;  REN=1;  //串口是否接收數(shù)據(jù)的開關(guān)EA=1; //總中斷打開,采用查詢法時不用打開中斷ES=1; //串口中斷開關(guān),采用查詢法時不用打開中斷}*///單片機時鐘周期:11.0592MHz	   以時鐘T2作為波特率發(fā)生器void SerialInit(){PCON &= 0x7F;      //波特率不倍速 SMOD=0SCON = 0x50;       //方式1,8位數(shù)據(jù),可變波特率,接收允許T2CON  = 0x34;   RCAP2H = 0xFF;    RCAP2L = 0xDC;  TH2    = 0xFF;  TL2    = 0xDC;EA=1; //總中斷打開,采用查詢法時不用打開中斷 ES = 1;          //串口中斷開關(guān),采用查詢法時不用打開中斷}//串口中斷函數(shù):void SerialPortInte(void) interrupt 4 //采用串口中斷法收發(fā)數(shù)據(jù){unsigned char rbyte;if(RI){     //RI=1,判定為串口接收到了數(shù)據(jù)，RI要清零，RI=0;rbyte=SBUF; if(rbyte==0x0A){ 	  SendString("換行");}else if(rbyte==0x0D){SendString("回車");}else{SendByte(rbyte); }}}//串口發(fā)送一個字節(jié):void SendByte(unsigned char sbyte){ SBUF=sbyte; //發(fā)送數(shù)據(jù)while(!TI); //等待發(fā)送完成TI=0; //清零發(fā)送標志位}//串口發(fā)送一個字符串:void SendString(unsigned char *pstr) //定義指針{while(*pstr!=