为何不看它的手册呢？

wang2 发表于 2018-12-10 17:05
#include "iic.h"
void delay()
{

你这是干什么？？

#include "iic.h"
void delay()
{
;;
}
void delay10ms()
{
int a,b;
for(a=50;a>0;a--)
for(b=200;b>0;b--);
}
void nack()
{
scl=1;
delay();
sda=1;
scl=0;
delay();
}
void start()
{
sda=1;
scl=1;
delay();
sda=0;
delay();
}
void stop()
{
sda=0;
scl=1;
delay();
sda=1;
delay();
}
void ack()
{
uchar i;
scl=1;
delay();
while((sda==1)&&i<520)
i++;
scl=0;
delay();
}
void write_byte(uchar date)
{
uchar i,temp;
temp=date;
for(i=0;i<8;i++)
{
temp=temp<<1;
sda=CY;
delay();
scl=1;
delay();
}
scl=0;
delay();
sda=1;
}
uchar read_byte()
{
uchar i,j,k;
scl=0;
delay();
for(i=0;i<8;i++)
{
scl=1;
delay();
j=sda;
k=(k<<1)|j;
scl=0;
delay();
}
return k;
}
void write_at24c32(uchar address,uchar date)
{
start();
write_byte(0x57);
ack();
write_byte(address);
ack();
write_byte(date);
ack();
stop();
}

uchar read_at24c32(uchar address)
{
uchar date;
write_byte(0x56);
ack();
write_byte(address);
ack();
start();
write_byte(0x57);
ack();
date=read_byte();
nack();
stop();
return date;
}

1. #include "iic.h"
   
2. void delay()
   
3. {
   
4. ;;
   
5. }
   
6. void delay10ms()
   
7. {
   
8. int a,b;
   
9. for(a=50;a>0;a--)
   
10. for(b=200;b>0;b--);
    
11. }
    
12. void nack()
    
13. {
    
14. scl=1;
    
15. delay();
    
16. sda=1;
    
17. scl=0;
    
18. delay();
    
19. }
    
20. void start()
    
21. {
    
22. sda=1;
    
23. scl=1;
    
24. delay();
    
25. sda=0;
    
26. delay();
    
27. }
    
28. void stop()
    
29. {
    
30. sda=0;
    
31. scl=1;
    
32. delay();
    
33. sda=1;
    
34. delay();
    
35. }
    
36. void ack()
    
37. {
    
38. uchar i;
    
39. scl=1;
    
40. delay();
    
41. while((sda==1)&&i<520)
    
42. i++;
    
43. scl=0;
    
44. delay();
    
45. }
    
46. void write_byte(uchar date)
    
47. {
    
48. uchar i,temp;
    
49. temp=date;
    
50. for(i=0;i<8;i++)
    
51. {
    
52. temp=temp<<1;
    
53. sda=CY;
    
54. delay();
    
55. scl=1;
    
56. delay();
    
57. }
    
58. scl=0;
    
59. delay();
    
60. sda=1;
    
61. }
    
62. uchar read_byte()
    
63. {
    
64. uchar i,j,k;
    
65. scl=0;
    
66. delay();
    
67. for(i=0;i<8;i++)
    
68. {
    
69. scl=1;
    
70. delay();
    
71. j=sda;
    
72. k=(k<<1)|j;
    
73. scl=0;
    
74. delay();
    
75. }
    
76. return k;
    
77. }
    
78. void write_at24c32(uchar address,uchar date)
    
79. {
    
80. start();
    
81. write_byte(0x57);
    
82. ack();
    
83. write_byte(address);
    
84. ack();
    
85. write_byte(date);
    
86. ack();
    
87. stop();
    
88. }
    
89. 
    
90. uchar read_at24c32(uchar address)
    
91. {
    
92. uchar date;
    
93. write_byte(0x56);
    
94. ack();
    
95. write_byte(address);
    
96. ack();
    
97. start();
    
98. write_byte(0x57);
    
99. ack();
    
100. date=read_byte();
     
101. nack();
     
102. stop();
     
103. return date;
     
104. }

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