89C51编程器介绍

89C51编程器介绍

#include "at89x52.h"
#include "stdio.h"
#include "intrins.h"
#include "ctype.h"

sbit rdy=P3^2;
sbit vpp=P3^3;
sbit p26=P3^4;
sbit p27=P3^5;
sbit p36=P3^6;
sbit p37=P3^7;
sbit prog=P2^7;

void init_serial()
{
SCON=0x50; /*mode 1*/
TMOD=0x20;
TH1=0xfd;
PCON=0x80; /*38400bps*/
TR1=1; /*load tmr1*/
TI=1;
ES=1;}

void init_pro()
{
p26=0;
p27=0;
p36=0;
p37=0;
vpp=1;
prog=1;
}

void sendbyte(unsigned char da) /*send a byte*/
{
while(!TI);
TI=0;
SBUF=da;}

unsigned char IntToAscii(unsigned char a) /*change DEC to ASCII HEX code*/
{
if(a10) return a+48;
if(a>9) return a+55;}

unsigned int getadr() /*get 5 diti DEC adr*/
{
unsigned char i,a[5];
for(i=0;i5;i++)
{
while(!RI);
RI=0;
a[i]=SBUF-48;
}
return a[0]*10000+a[1]*1000+a[2]*100+a[3]*10+a[4];}

unsigned char getdata() /*get 2 diti HEX data*/
{
unsigned char d1,d2;
while(!RI);
RI=0;
d1=toint(SBUF);
while(!RI);
RI=0;
d2=toint(SBUF);
return d1*16+d2;}

unsigned int detchip(int adr)
{
P0=0xff;
P1=adr%256;P2=adr/256;
init_pro();
_nop_();_nop_();_nop_();_nop_();_nop_(); /*delay 10 us*/
_nop_();_nop_();_nop_();_nop_();_nop_();
return P0;}

void read()
{
unsigned int adr,maxadr;
unsigned char h,l;
P0=0xff;
maxadr=getadr();
for(adr=0;adrmaxadr;adr++)
{
P1=adr%256;P2=adr/256;
p26=0;
p27=0;
p36=1;
p37=1;
vpp=1;
prog=1;
h=IntToAscii(P0/16);
sendbyte(h);
l=IntToAscii(P0%16);
sendbyte(l);}
init_pro();}

unsigned int test(unsigned int nn)
{
unsigned int adr,counter=0;
P0=0xff;
for(adr=0;adrnn;adr++)
{
P1=adr%256;P2=adr/256;
p26=0;
p27=0;
p36=1;
p37=1;
vpp=1;
prog=1;
_nop_();_nop_();_nop_();_nop_();_nop_(); /*delay 10 us*/
_nop_();_nop_();_nop_();_nop_();_nop_();
if(P0!=0xff) counter++;}
init_pro();
return counter;}

unsigned char erase(unsigned int nn,unsigned int p)
{
unsigned int i;
P0=0xff;
p26=1;
p27=0;
p36=0;
p37=0;
vpp=0;
prog=1;
for(i=0;i50000;i++) _nop_();
switch(p)
{
case 0 : prog=0;
prog=1;
break;
case 1 : prog=0;
_nop_();
prog=1;
break;
case 2 : prog=0;
_nop_();_nop_();
prog=1;
break;
case 3 : prog=0;
_nop_();_nop_();_nop_();
prog=1;
break;
case 4 : prog=0;
_nop_();_nop_();_nop_();_nop_();
prog=1;
break;
case 5 : prog=0;
_nop_();_nop_();_nop_();_nop_();_nop_();