sample.c

采用430单片机完成的门禁控制器程序

#include <reg51.h>
#include <intrins.h>

unsigned char time;
void int_t0(void) interrupt 1
{
  time++;
}

unsigned char d;	//rec data

bit rec(void) 
{
  TH0=0;
  time=0;
  while (!RI) 
  {if (time>1) return(1);}
  RI=0;
  d=SBUF;
  return(0);
}
void sen(unsigned char dd) 
{
  SBUF=dd;
  while (!TI) {}
  TI=0;
}

void wait(void) 
{
  time=0;
  while (time<10) {}
}

void wait10ms(void) 
{
  TH0=150;
  time=0;
  while (!time) {}
}

sbit ce=P3^5;
sbit oe=P3^6;
sbit we=P3^7;
sbit a16=P3^2;
sbit a17=P3^3;
sbit a18=P3^4;



void pro_to_card(void) 
{
  unsigned char no,i,j;
  sen(0xaa);
  if (rec()) 
  {wait();return;}
  no=d;
  sen(d);
  no<<=2;
  no|=0xe3;
  P3=0xff;
  P3&=no;
  i=0;
  do 
  {
    P0=i;
    j=0;
    do 
    {
      if (rec()) 
      {wait();ce=1;return;}
      TI=0;
      SBUF=d;
      P1=j;
      P2=d;
      ce=0;
      we=0;
      we=1;
      ce=1;
      j++;
    } while (j);
    wait10ms();
    i++;
  } while (i);
  ce=1;
}

void card_to_pro(void)
{
  unsigned char no,i,j;
  sen(0x55);
  if (rec()) 
  {wait();return;}
  no=d;
  sen(d);
  no<<=2;
  no|=0xe3;
  P3=0xff;
  P3&=no;
  P2=0xff;
  i=0;
  do 
  {
    P0=i;
    j=0;
    do 
    {
      P1=j;
      ce=0;
      oe=0;
      no=P2;
      oe=1;
      ce=1;
      j++;
      sen(no);
      if (rec())
      {wait();return;}
      if (no!=d) 
      {wait();return;}
    } while (j);
    i++;
  } while (i);
}




/*
void load(unsigned int as,unsigned char dd) {
	P0=as/256;P1=as;P2=dd;
	ce=0;we=0;we=1;ce=1;
}
void erase(void) {
	a16=a17=a18=0;
	load(0x5555,0xaa);
	load(0x2aaa,0x55);
	load(0x5555,0x80);
	load(0x5555,0xaa);
	load(0x2aaa,0x55);
	load(0x5555,0x10);
	wait10ms();
	wait10ms();
}

void unlock(void) {
	unsigned char i;
	a16=a17=a18=0;
	load(0x5555,0xaa);
	load(0x2aaa,0x55);
	load(0x5555,0x80);
	load(0x5555,0xaa);
	load(0x2aaa,0x55);
	load(0x5555,0x20);
	i=0;
	do {
		P1=i;
		ce=0;we=0;we=1;ce=1;
		i++;
	} while (i);
}
*/

void main(void)
{
  SCON=0x80;
  TMOD=0x21;
  ET0=TR0=1;EA=1;
  wait10ms();
//erase();
//unlock();
  REN=1;
  while (1)
  {
    REN=1;RI=0;
    while (!RI) {} RI=0;
    switch (SBUF)
    {
    case 0x55:card_to_pro();break;
    case 0xaa:pro_to_card();break;
    case 0xa5:
              _nop_();
              _nop_();
              _nop_();
              _nop_();
              _nop_();
              _nop_();
              _nop_();
              _nop_();
              _nop_();
              _nop_();
              _nop_();
              _nop_();
              sen(0xaa);
              break;
    }
  }
}