矩阵键盘的检测及使用

基于TX-1C开发板 , 电路连接图如下:
 
1 #include
2 #define uint unsigned int
3 #define uchar unsigned char
4 sbit dula=P2^6; //段选
5 sbit wela=P2^7; //位选
6
7 uchar code tab[]={
8 0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,
9 0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71
10 };
11 void display(uchar);
12 void main()
13 {
14 uchar row,col,sum;
15 dula=1;
16 P0=0x00;
17 dula=0;
18 P0=0xFF;
19
20 wela=1;
21 P0=0xC0;
22 wela=0;
23
24 while (1)
25 {
26 P3=0X0f;
27 row=P3; //行
28
29 P3=0Xf0;
30 col=P3; //列
31 sum=row+col;//读取到的键盘值
32 switch(sum)
33 {
34 case 0xee:display(0);
35 break;
36 case 0xde:display(1);
37 break;
38 case 0xbe:display(2);
39 break;
40 case 0x7e:display(3);
41 break;
42 case 0xed:display(4);
43 break;
44 case 0xdd:display(5);
45 break;
46 case 0xbd:display(6);
47 break;
48 case 0x7d:display(7);
49 break;
50 case 0xeb:display(8);
51 break;
52 case 0xdb:display(9);
53 break;
54 case 0xbb:display(10);
55 break;
56 case 0x7b:display(11);
57 break;
58 case 0xe7:display(12);
59 break;
60 case 0xd7:display(13);
61 break;
62 case 0xb7:display(14);
63 break;
64 case 0x77:display(15);
65 break;
66 }
67 }
68 }
69 void display(uchar num)
70 {
71 dula=1;
72 P0=tab[num];
73 dula=0;
【矩阵键盘的检测及使用】74 }

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