tongx3.c

c语言和汇编语言混合编程实例详解.rar

/*********************************************************************
*文件名: tongx3.c
*功  能：AT89C52与N台AT89C2051通讯，双方均有RS485接口 ，AT89C52用T2作
*        波特率发生器, 波特率为9600，配套89C2051程序为EYE124.C
**********************************************************************/
#include <reg52.h>
#include <absacc.h>

#define uchar unsigned char
#define uint unsigned int
sbit p14=P1^4;

uchar idata kc1,kc2,aa,iii;
uchar idata rbut2[36];
uchar idata tbut[12];
uchar idata rbut[16];
uint idata r;

void timedelay(uint timess);

sio0() interrupt 4
{
 one:if (SM2==0) goto noar;
    if (SBUF!=aa) goto noads;
    SM2=0;
noads:RI=0;
    TI=0;
    return;
noar:;
    rbut[kc2]=SBUF;
    kc2++;
    if (kc2!=16) goto noads;
    SM2=1;
    goto noads;
}

void timedelay(uint timess)
{
 uint tj;
 for (tj=timess;tj>0;tj--){;}
}
void intrbut(void)
{
  uchar coni;
  for (coni=0;coni<3;coni++)
  {
    rbut[coni]=0;
  }
  rbut[2]=0x87;    //8888888
  rbut[3]=0xa2;
  rbut[4]=0x38;
  rbut[5]=0x87;    //8888888
  rbut[6]=0xa2;
  rbut[7]=0x38;
  rbut[8]=0x87;    //8888888
  rbut[9]=0xa2;
  rbut[10]=0x38;
  rbut[11]=0x87;    //8888888
  rbut[12]=0xa2;
  rbut[13]=0x38;
}

void  communi(void)      /*   RS-485 通讯 */
{
  uchar coni;
  kc1=0;
  kc2=0;
  aa=0;
  intrbut();
  for (coni=0;coni<10;coni++)
  {
    tbut[coni]=0x00;
  }
  tbut[2]=01;
  tbut[3]=02;
  tbut[4]=03;
  tbut[5]=tbut[2]+tbut[3]+tbut[4];  //add check
  TR2=1;

for (coni=0;coni<64;coni++)
{
  aa=coni+1;
  p14=1;        //准备发送
  timedelay(20000);
  SCON=0xe8;
  ES=0;
  EA=0;
  SBUF=aa;
loo1:if (TI==0) goto loo1;
   TI=0;
   SCON=0xe0;
   SBUF=tbut[kc1];
   kc1++;
   if (kc1!=11) goto loo1;
   kc1=0;
   p14=0;       //准备接收
   SCON=0xf0;
   ES=1;
   EA=1;
   r=0;
loo:;
  if (kc2!=16) {r++; if(r>65530) {goto sss;} else {goto loo;}}
sss:;
  kc2=0;
  if(r>65530) {intrbut();}
  for (iii=0;iii<12;iii++)
  {
    rbut2[(aa-1)*12+iii]=rbut[2+iii];
  }
 }
  TR2=0;
  EA=1;
 }

void main(void)
{
      SP=0xdf;
      timedelay(10000);
      EA=0;
      kc1=0;
      kc2=0;
      T2CON=0;    //11.0592mhz,9600=ffdc;1200=fee0h
      T2IE=1;     //12.0mhz,   9600=ffd9h;1200=fec8h
      T2RSE=1;
      RCAP2H=0xff;
      RCAP2L=0xdc;
      EA=1;
      communi();
      while(1);
}