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本人純純的小白，設(shè)計(jì)做這個(gè)在網(wǎng)上找的程序 不知道什么原因編譯時(shí)引腳全是未定義 這程序哪里錯(cuò)了 有無(wú)老哥解釋下
#include <AT89X52.h>
#define UCHAR UNSIGNED CHAR
#define UINT UNSIGNED INT
#define DAC0832 P1
unsigned char codediscode[] = {0x03f,0x06,0x5b,0x4f,0x66,0x6d, 0x7d,0x07,0x7f,0x6f,0x76}; /* ??????????? */
unsigned char disbuf[4];
sbit wr1=P3^6;
sbit rd1=P3^7;
sbit key1=P2^0;
sbit key2=P2^1;
sbit key3=P2^2;
sbit key4=P2^3;
void delay(void) /*???????*/
{
uchar x;
for(x=0;x<20;x++);
}
void hexbcd(uint a) /*??DA??????????????????????? */ /* a?????DA??????? */
{
float b;
int c;
b =10.00; /*2209.40000000/256.00000000;*/ /*????????????a=50??????????5V????a=150??????????15V??????????λ?????????????????10??????*/
c = b*a;
disbuf[3] = c/1000;
disbuf[2] = c%1000/100;
disbuf[1] = c%100/10;
disbuf[0] = c%10;
}
void key(void) /*??????????*/
{ /* key1??+0.1V a+=1 */
/* key2??+1V a+=10 */
int a; /* key3??-1V a-=10 */
if(key1) /* key4??+0.1V a-=1 */
{
if(key2)
{
if(key3)
{
if(key4);
else
{
while(key4 == 0);
a=4;
}
}
else
{
while(key3 == 0);
a=3;
}
}
else
{
while(key2 == 0);
a=2;
}
}
else
{
while(key1 == 0);
a=1;
}
if(a==1) DAC0832 += 1;
else if(a==2) DAC0832 += 10;
else if(a==3) DAC0832 -= 10;
else if(a==4) DAC0832 -= 1;
else DAC0832 = DAC0832;
if(DAC0832<0) /* ????DA???????????????????????????????????????Χ4.5V--16V */
DAC0832 = 0;
else if(DAC0832>310)
DAC0832 = 310;
else;
}
void display(void) /* ????????????3λ??С???? */
{
P0 = discode[disbuf[0]];
P2_7 = 0;
P2_6 = 1;
P2_5 = 1;
P2_4 = 1;
delay();
P2_7 = 1;
P2_6 = 1;
P2_5 = 1;
P2_4 = 1;
P0 = discode[disbuf[1]];
P2_7 = 1;
P2_6 = 0;
P2_5 = 1;
P2_4 = 1;
delay();
P2_7 = 1;
P2_6 = 1;
P2_5 = 1;
P2_4 = 1;
P0 = discode[disbuf[2]]+0x80;
P2_7 = 1;
P2_6 = 1;
P2_5 = 0;
P2_4 = 1;
delay();
P2_7 = 1;
P2_6 = 1;
P2_5 = 1;
P2_4 = 1;
P0 = discode[disbuf[3]];
P2_7 = 1;
P2_6 = 1;
P2_5 = 1;
P2_4 = 0;
delay();
P2_7 = 1;
P2_6 = 1;
P2_5 = 1;
P2_4 = 1;
}
void main(void) /* ?????? */
{
wr1 = 0; /* DA????????????Ч */
rd1 = 0; /* DA????????????Ч */
DAC0832 = 50; /* ???????????????????????5V */
while(1)
{
key(); /* ???e??????? */
hexbcd(DAC0832); /* ??????????? */
display(); /* ??????????? */
}
}
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