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用一兩片164芯片 ，一個段 ，一個位，最后一位總是顯示異常，段選 的值 沒問題，proteus軟件也沒問題。
誰能看下
代碼：
- #include<reg52.h>
- #include<intrins.h>
- typedef unsigned char uchar;
- typedef unsigned int uint;
- #define date P0
- #define count 50000
- #define TH_0 (65536-count)/256
- #define TL_0 (65536-count)%256
- sbit ds=P0^0;
- sbit clk=P0^1;
- uchar diss[8];
- uchar code distab[17] = {0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,
- 0x07,0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71,0x40};
- uint sec=58,min=59,hour=9;
- void delay(uint iii)
- {
- while(iii--);
- }
- void hc164(uchar dat1)
- {
- uchar i=0;
- for(i=0;i<8;i++)
- {
- clk=0;
- ds=dat1>>7;
- dat1=dat1<<1;
- clk=1;
- _nop_();
- _nop_();
- }
- }
- void display()//數(shù)碼管顯示
- {
- uchar i=0,dat=0;
- for(dat=0xfe;dat!=0xff;dat=dat<<1|0x01)
- {
- delay(100);
- hc164(distab[diss[7-i++]]);
-
- hc164(dat);
-
- if(i==8)i=0;
- delay(500);
- }
- }
- void disss()
- {
- diss[0]=hour/10;
- diss[1]=hour%10;
- diss[2]=16;
- diss[3]=min/10;
- diss[4]=min%10;
- diss[5]=16;
- diss[6]=sec/10;
- diss[7]=sec%10;
- }
- void timer0_init()
- {
- TMOD=0x01;
- EA=1;ET0=1;TR0=1;
- TH0=TH_0;TL0=TL_0;
- }
- void main()
- {
- timer0_init();
- while(1)
- {
- display();
- disss();
- }
- }
- void timer0() interrupt 1
- {
- static uchar j;
- TH0=TH_0;TL0=TL_0;
- if(++j==20)
- {
- j=0;
- sec++;
- if(sec==60)
- {
- sec=0;
- min++;
- if(min==60)
- {
- min=0;
- hour++;
- if(hour==24)
- {
- hour=0;
- }
- }
- }
- }
- }
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