ok6410 led 流水灯程序

ljc710871968

1. #include <stdio.h>
   
2. #include <stdlib.h>
   
3. #include <unistd.h>
   
4. #include "sys/types.h"
   
5. #include "sys/ioctl.h"
   
6. #include "stdlib.h"
   
7. #include "termios.h"
   
8. #include "sys/stat.h"
   
9. #include "fcntl.h"
   
10. #include "sys/time.h"
    
11. 
    
12. #define LED_ON 0
    
13. #define LED_OFF 1
    
14. 
    
15. int main()
    
16. {
    
17. int fd,i,j,k;
    
18. int led_status = 0; //初始状态为熄灭
    
19. fd = open("/dev/leds", O_RDONLY); //打开设备
    
20. if (fd < 0) { // 如果打开设备失败，退出
    
21. perror("open device led failed !");
    
22. exit(1);
    
23. }
    
24. printf("led test show. press ctrl+c to exit \n");
    
25. ioctl(fd,LED_OFF);
    
26. 
    
27. while(1){//主循环
    
28. 
    
29. k++;
    
30. ioctl(fd,LED_ON,0); //点亮
    
31. printf("led0: on \n");
    
32. for(i=0;i<3000;i++)
    
33. for(j=0;j<10000;j++);
    
34. ioctl(fd,LED_OFF,0); //熄灭
    
35. 
    
36. 
    
37. ioctl(fd,LED_ON,1); //点亮
    
38. printf("led1: on \n");
    
39. for(i=0;i<3000;i++)
    
40. for(j=0;j<10000;j++);
    
41. ioctl(fd,LED_OFF,1); //熄灭
    
42. 
    
43. 
    
44. ioctl(fd,LED_ON,2); //点亮
    
45. printf("led2: on \n");
    
46. for(i=0;i<3000;i++)
    
47. for(j=0;j<10000;j++);
    
48. ioctl(fd,LED_OFF,2); //熄灭
    
49. 
    
50. 
    
51. ioctl(fd,LED_ON,3); //点亮
    
52. printf("led3: on \n");
    
53. for(i=0;i<3000;i++)
    
54. for(j=0;j<10000;j++);
    
55. ioctl(fd,LED_OFF,3); //熄灭
    
56. 
    
57. 
    
58. }
    
59. close(fd); //关闭设备
    
60. return 0;
    
61. }
    

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