2021年04月06日 | 89C51编程器端驱动程序的例子

简介：本文提供给大家一个89C51编程器端驱动程序的例子

/* 89C51系列CPU编程器接收CPU程序*/

#include

#include

#include

#define e 8

#define p 9

#define l 10

sbit led=P3^2;

sbit p27=P2^7;

sbit p26=P2^6;

sbit p36=P3^6;

sbit p37=P3^7;

sbit rst=P3^3;

sbit ale=P3^5;

sbit vpp=P3^4;

bit b_break;

unsigned int adds;

//

// 13.8mS

void int_t0(void) interrupt 1 {

 TH0=-100;

 b_break=1;

}

void wait(unsigned char w) {

 unsigned int t=w*184;

 b_break=0;

 TL0=-t%256-1;TH0=-t/256;

 while (b_break==0) {}

}

void nop(void) {

 _nop_();_nop_();_nop_();_nop_();

 _nop_();_nop_();_nop_();_nop_();

 _nop_();_nop_();_nop_();_nop_();

 _nop_();_nop_();_nop_();_nop_();

 _nop_();_nop_();_nop_();_nop_();

}

unsigned char command(void) {

 TH0=-100;b_break=0;

 while (RI==0) {if (b_break==1) return(0);}

 RI=0;

 return(SBUF);

}

void earsure(unsigned char cpu) {

 switch (cpu) {

 case 1:  //89C51

 case 2:rst=p26=1;p27=p36=p37=0;nop();vpp=1;nop();

  ale=0;wait(110);ale=1;nop();

  break;

 case 3:

 case 4:break;

 case 5:

 case 6:break;

 }

}

void program(unsigned char cpu) {

 unsigned int bdata adds=0;

 unsigned char d;

 switch (cpu) {

 case 1: //89C51

 case 2:

  p36=p37=1;rst=1;

  while (1) {

   TH0=-100;b_break=0;

   while (RI==0) {if (b_break==1) return;}

   RI=0;

   d=SBUF;

   //address

   P0=adds%256;

   P2=adds/256;

   p27=1;

   //data

   P1=d;

   nop(); //48clcl

   //vpp

   vpp=1;

   nop(); //48clcl

   //ale

   ale=0;

   wait(1);//100uS

   ale=1;

   nop(); //10uS

   vpp=0;

   nop(); //48clcl

   p27=0;

   nop(); //48clcl

   P1=0xff;

   TH0=-100;b_break=0;

   while (d!=P1) {if (b_break==1) return;} //data polling

   SBUF=d;

   adds++;

  }

  break;

 case 3:

 case 4:

 case 5:

 case 6:break;

 }

}

void lock(unsigned char cpu) {

 unsigned char i;

 switch (cpu) {

 case 1: //89c51

 case 2:

  //lock 1

  rst=p26=p36=p27=p37=1;nop();

  vpp=1;

  nop();

  ale=0;

 // for (i=0;i<6;i++) wait(100);

  wait(1);

  ale=1;

  nop();

  vpp=0;

  nop();

  //lock 2

  rst=p26=p27=1;p36=p37=0;nop();

  vpp=1;

  nop();

  ale=0;

 // for (i=0;i<6;i++) wait(100);

  wait(1);

  ale=1;

  nop();

  vpp=0;

  nop();

  //lock 3

  rst=p26=p36=1;p27=p37=0;nop();

  vpp=1;

  nop();

  ale=0;

 // for (i=0;i<6;i++) wait(100);

  wait(1);

  ale=1;

  nop();

  vpp=0;

  nop();

  break;

 case 3:

 case 4:

 case 5:

 case 6:break;

 }

}

void main(void) {

 unsigned char disp,flash,temp,cpu;

 EA=1;

 SCON=0xd8;PCON=0x80;

 TMOD=0x21;

 TL1=TH1=0xff;TR1=1;

 TH0=-100;ET0=TR0=1;

 flash=0x80;

 while (1) {

  temp=command();

  switch (temp) {

  case 0:

  case 1:  //89c51

  case 2:  //89C52

  case 3:  //80f51

  case 4:  //80F52

  case 5:  //87F51

  case 6:cpu=temp;SBUF=temp;break;//87f52

  case e:SBUF=temp;earsure(cpu);break; //erasure

  case p:SBUF=temp;program(cpu);break; //program

  case l:lock(cpu);SBUF=temp;break; //lock

  default:SBUF=temp;break;

  }

  b_break=0;

  if ((++disp)>flash) {disp=0;led=!led;}

 }

}