自己用 C51写的串口通讯程序

/*定义为中断方式串口处理*/

#define INTERSENDSTR

/*不为8032系列芯片 */

//#define CHIP_8032

#include

#include

#include

#include "err.h"

#ifdef INTERSENDSTR

unsigned 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 charPSetBps(unsigned int bps) SMALL

{

unsigned int t1;

unsigned char t2;

#ifdef INTERSENDSTR

/*如果使用中断方式发送数据,必须等待发送数据完毕才能更换波特率 */

while(bSin!=bSout)

{

;

}

ES=0;

#endif

#ifdef CHIP_8032

if(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

*/

#else

t1=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 INTERSENDSTR

unsigned 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;

#ifdefINTERSENDSTR

ch=sRecComBuf[bOut];

bOut++;

return ch;

#else

ch=SBUF;

RI=0;

#endif

}

bit PCharInCom() SMALL

{

#ifdefINTERSENDSTR

if(bIn!=bOut)

{

return 1;

}

return 0;

#else

return RI;

#endif

}

void PSendString(unsigned char *st) SMALL

{

while(*st)

{

PSendChar(*st);

st++;

}

}

void PSendArray(unsigned char*st,unsigned intlen) SMALL

{

unsigned int ii;

for(ii=0;ii

{

PSendChar(st[ii]);

}

}

#ifdefINTERSENDSTR

void 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