给下面程序每一句添加注解
#include <reg51.h>
#include <absacc.h>
#include <intrins.h>
#define uchar unsigned char
#define uint unsigned int
sbit RS = P1^7;
sbit RW = P1^6;
sbit EN = P1^5;
sbit ST = P3^7;
sbit OE = P3^6;
sbit EOC = P1^3;
sbit CLK = P1^4;
sbit key1 = P1^0;
uchar data chnumber;
uchar disbuffer[4] = {0, '.', 0, 0};
uchar data ad_data[8] = {0,0,0,0,0,0,0,0};
void fbusy()
{
P0 = 0xff;
RS = 0;
RW = 1;
EN = 1;
EN = 0;
while((P0 & 0x80))
{
EN=0; EN=1;
}
}
void wc51r(uchar j)
{
fbusy();
EN = 0;
RS = 0;
RW = 0;
EN = 1;
P0 = j;
EN = 0;
}
void wc51ddr(uchar j)
{
fbusy();
EN = 0;
RS = 1;
RW = 0;
EN = 1;
P0 = j;
EN = 0;
}
void init()
{
wc51r(0x01);
wc51r(0x38);
wc51r(0x0c);
wc51r(0x06);
}
test()
{
uchar m;
for (m=0; m<8; m++)
{
P3 = m;
ST=0;_nop_();_nop_(); ST=1;_nop_();_nop_(); ST=0;
_nop_();_nop_();_nop_();_nop_();
while (EOC==0);
OE=1; ad_data[m]=P2; OE=0;
}
}
void delay(uint i)
{
uint y, j;
for (j=0; j<i; j++) {
for (y=0; y<0xff; y++) {;}
}
}
void TOX(void) interrupt 1 using 0
{ CLK =~CLK; }
void main(void)
{
uchar i;
SP=0X50; TMOD=0x02; TH0=246; TL0=246;
ET0=1; EA=1; TR0=1;
delay(10);
init();
wc51r(0x81);
wc51ddr('A');
wc51ddr('D');
wc51ddr('D');
wc51ddr('R');
wc51ddr(':');
wc51r(0xC0);
wc51ddr('V');
wc51ddr('A');
wc51ddr('L');
wc51ddr('U');
wc51ddr('E');
wc51ddr(':');
while(1)
{
test();
if (key1 == 0) {
while(key1==0); chnumber++;
if (chnumber==8) chnumber=0;
}
temp = ad_data[chnumber];
temp = (temp*100)/51;
disbuffer[0] = temp/100+0x30; temp = temp%100;
disbuffer[2] = temp/10 + 0x30;
disbuffer[3] = temp/10 + 0x30;
wc51r(0x88);
wc51ddr(chnumber + 0x30);
wc51r(0xc8);
for (i=0; i<4; i++) wc51ddr(disbuffer[i]);
}
}
