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单片机串口程序

发布时间:2020-07-21 17:29:20 阅读: 来源:说明书厂家

51单片机串口调试程序一列

/*定义为中断方式串口处理*/#define INTERSENDSTR/*不为8032系列芯片 */ //#define CHIP_8032

#include absacc.h>#include reg51.h>#include string.h>#include "err.h"

#ifdef INTERSENDSTRunsigned char xdata sSendComBuf[256],sRecComBuf[256];unsigned char data bOut,bIn,bSout,bSin;#else#define DEFSENDCHAR TI=0;SBUF=ACC;while(!TI);TI=0;#endif//bps设置 9600就是 PSetBps(96)(11.0592Mhz)

unsigned char PSetBps(unsigned int bps) SMALL{unsigned int t1;unsigned char t2;#ifdef INTERSENDSTR/*如果使用中断方式发送数据,必须等待串口发送数据完毕才能更换波特率 */while(bSin!=bSout){;}ES=0;#endif

#ifdef CHIP_8032if(3456%bps){return ERR_SET_BPS;}t1=3456/bps;t1--;t1=~t1;RCAP2H=t1/256;RCAP2L=t1;T2MOD=0x00;/*使用定时器2做波特率发生器 */T2CON=0x34;/*TF2=0;EXF2=0;RCLK=1;TCLK=1;EXEN2=0;TR2=1;C/T2=0;CP/RL2=0*/#elset1=576/bps;if((576%bps)||((t1==0))||(t1>=2*256)) {return ERR_SET_BPS;}if(t1>256){PCON=00;t2=256-(288/bps);}else{PCON=0x80;t2=256-t1;}TH1=t2;TL1=t2;TR1=1;#endif /*模式3*/SM0=0;RI=0;TI=0;REN=1;SM1=1;SM2=1;#ifdef INTERSENDSTR bOut=bIn;bSout=bSin;ES=1;#endif return OK;}void PSendChar(unsigned char ch) SMALL{

#ifdef INTERSENDSTRunsigned char tch;

tch=bSin+1;while(tch==bSout){;}sSendComBuf[bSin]=ch;ES=0;if((bSout==bSin)){SBUF=sSendComBuf[bSin];bSin++;}else{bSin++; }ES=1;#else ACC=ch;DEFSENDCHAR;#endif }unsigned char PGetChar() SMALL{unsigned char ch;#ifdef INTERSENDSTRch=sRecComBuf[bOut];bOut++;return ch;#elsech=SBUF;RI=0;#endif }bit PCharInCom() SMALL{#ifdef INTERSENDSTRif(bIn!=bOut){return 1;}return 0;#elsereturn RI;#endif}void PSendString(unsigned char *st) SMALL{while(*st){PSendChar(*st);st++;}}void PSendArray(unsigned char *st,unsigned int len) SMALL{unsigned int ii;for(ii=0;iilen;ii++){PSendChar(st[ii]);}}#ifdef INTERSENDSTRvoid PSerialInt() interrupt 4{if(RI) {sRecComBuf[bIn]=SBUF;bIn++;RI=0;}if(TI){TI=0;if(bSout!=bSin){bSout++;}if(bSout!=bSin){SBUF=sSendComBuf[bSout];}}}#endif

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