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数码管动态扫描显示方式

2010-08-09 18:27  李龙江  阅读(981)  评论(0)  编辑  收藏  举报
数码管依次显示1-6，并保持造成视觉停留状态，也叫动态扫描显示

 1#include <reg52.h>
 2#define uint unsigned int
 3#define uchar unsigned char
 4sbit dula=P2^6;

 5sbit wela=P2^7;
 6uchar timer,numwe,numdu; //timer定时器计数 temp数字临时存放
 7//数字字码表 0-F 8uchar code table[]={
 90x3f,0x06,0x5b,0x4f,
100x66,0x6d,0x7d,0x07,
110x7f,0x6f,0x77,0x7c,
120x39,0x5e,0x79,0x7113};
14uchar code we[]={
150xFE,0xFD,0xFB,0xF7,0xEF,0xDF,0xBF,0x7F16};
17void init();
18void display();
19void main()
20{
21    init();
22    display();
23}
2425void init()
26{
27    TMOD=1;
28    TH0=0xFC;
29    TL0=0x66;
30    ET0=1;
31    EA=1;
32    TR0=1;
33}
34void display()
35{
36    wela=1;
37    P0=0xF8;
38    wela=0;
39    P0=0xFF;
40    dula=1;
41    P0=0x00;
42    dula=0;
43    numdu=1;
44while (1)
45    {
46if (timer==1)
47        {
48            timer=0;
49            wela=1;
50            P0=we[numwe];
51            wela=0;
52            P0=0xFF;
53            numwe++;
54if(numwe==6)
55                numwe=0;
5657            dula=1;
58            P0=table[numdu];
59            dula=0;
60            numdu++;
61if(numdu==7)
62                numdu=1;
63            P0=0xFF;
64        }
65    }
66}
67void delay() interrupt 168{
69    TH0=0xFC;
70    TL0=0x66;
71    timer++;
72}
73