标题: 单片机逻辑判断实验 [打印本页]

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作者: liuda    时间: 2015-1-21 22:56
标题: 单片机逻辑判断实验
是用51hei单片机开发板 电路图详见：http://www.51hei.com/f/51hei-5.pdf  的数码管部分， 用2个74hc573 锁存，p0口作为数据口 ，p3.6和p3.7分别是段和位的锁存端口.

1. #include<reg52.h>
   
2. #define uchar unsigned char
   
3. #define uint unsigned int
   
4. uchar code SEG7[10]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f};
   
5. sbit D=P3^6;
   
6. sbit V=P3^7;
   
7. sbit P2_5=P2^5;
   
8. sbit P2_6=P2^6;
   
9. //============
   
10. uchar data a=0,b=0,out;
    
11. //===========
    
12. uchar key_S1(void);
    
13. uchar key_S2(void);
    
14. void delay(uint k);
    
15. //============
    
16. void main(void)
    
17. {
    
18. while(1)
    
19. {
    
20. b=key_S1();
    
21. a=key_S2();
    
22. if((a==8)&&(b==5))out=1;
    
23. else out=0;
    
24. D=1;
    
25. P0=SEG7[a];
    
26. D=0;
    
27. P0=0xff;
    
28. V=1;
    
29. P0=0xfe;
    
30. V=0;
    
31. delay(2);
    
32. D=1;
    
33. P0=SEG7[b];
    
34. D=0;
    
35. P0=0xff;
    
36. V=1;
    
37. P0=0xfd;
    
38. V=0;
    
39. delay(2);
    
40. D=1;
    
41. if(out==1)P0=0x73;      
    
42. else P0=0x00;      
    
43. D=0;
    
44. P0=0xff;
    
45. V=1;
    
46. P0=0xfb;
    
47. V=0;
    
48. delay(2);
    
49.    }
    
50. }
    
51. //===========
    
52. void delay(uint k)
    
53. {
    
54. uint i,j;
    
55. for(i=0;i<k;i++){
    
56. for(j=0;j<121;j++)
    
57. {;}}
    
58. }
    
59. //============
    
60. uchar key_S1(void)
    
61. {uchar data x;
    
62. P2=0xff;
    
63. if(!P2_5)x=5;
    
64. else x=0;
    
65. return x;
    
66. }
    
67. //===========
    
68. uchar key_S2(void)
    
69. {uchar data y;
    
70. P2=0xff;
    
71. if(!P2_6)y=8;
    
72. else y=0;
    
73. return y;
    
74. }

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作者: 18246288682    时间: 2015-4-14 22:49
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