C语言编写的 24C02程序 C语言, 程序, 编写

fghser

1. #define uchar unsigned char
   
2. #define uint unsigned int
   
3. #include <reg52.h>
   
4. #include <stdio.h>
   
5. #include <absacc.h>
   
6. sbit scl=P3^5; //24c02 SCL
   
7. sbit sda=P3^4; //24c02 SDA
   
8. sbit DOG=P1^7; //看门狗
   
9. uchar x24c02_read(uchar address); //从24c02的地址address中读取一个字节数据
   
10. void x24c02_write(uchar address,uchar info); //向24c02的address地址中写入一字节数据info
    
11. void x24c02_init(); //24c02初始化子程序
    
12. void delay1(uchar x);
    
13. void flash();
    
14. void x24c01_init();
    
15. void start();
    
16. void stop();
    
17. void writex(uchar j);
    
18. uchar readx();
    
19. void clock();
    
20. void delay1(uchar x)
    
21. {
    
22. uint i;
    
23. for(i=0;i<x;i++);
    
24. DOG=~DOG;
    
25. }
    
26. void flash()
    
27. {
    
28. uchar u;
    
29. DOG=~DOG;
    
30. }
    
31. void x24c02_init()
    
32. {
    
33. scl=1; flash(); sda=1; flash();
    
34. }
    
35. void start()
    
36. {
    
37. sda=1; flash(); scl=1; flash(); sda=0; flash(); scl=0; flash();
    
38. }
    
39. void stop()
    
40. {
    
41. sda=0; flash(); scl=1; flash(); sda=1; flash();
    
42. }
    
43. void writex(uchar j)
    
44. {
    
45. uchar i,temp;
    
46. temp=j;
    
47. for (i=0;i<8;i++){
    
48. temp=temp<<1; scl=0; flash(); sda=CY; flash(); scl=1; flash();
    
49. }
    
50. scl=0; flash(); sda=1; flash();
    
51. }
    
52. uchar readx()
    
53. {
    
54. uchar i,j,k=0;
    
55. scl=0; flash(); sda=1;
    
56. for (i=0;i<8;i++){
    
57. flash(); scl=1; flash();
    
58. if (sda==1) j=1;
    
59. else j=0;
    
60. k=(k<<1)|j; scl=0;
    
61. }
    
62. flash(); return(k);
    
63. }
    
64. void clock()
    
65. {
    
66. uchar i=0;
    
67. scl=1; flash();
    
68. while ((sda==1)&&(i<255))i++;
    
69. scl=0; flash();
    
70. }
    
71. uchar x24c02_read(uchar address)
    
72. {
    
73. uchar i;
    
74. start(); writex(0xa0);
    
75. clock(); writex(address);
    
76. clock(); start();
    
77. writex(0xa1); clock();
    
78. i=readx(); stop();
    
79. delay1(10);
    
80. return(i);
    
81. }
    
82. void x24c02_write(uchar address,uchar info)
    
83. {
    
84. EA=0;
    
85. start(); writex(0xa0);
    
86. clock(); writex(address);
    
87. clock(); writex(info);
    
88. clock(); stop();
    
89. EA=1;
    
90. delay1(50);
    
91. }

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