【赛昉科技昉·星光RISC-V单板计算机试用体验】驱动电机

本文来源电子发烧友社区，作者：黄宝亚， 帖子地址：https://bbs.elecfans.com/jishu_2289350_1_1.html


使用448和450口，实现电机正传几圈，翻转几圈，一直循环
程序如下

1. #include
2. #include
3. #include
4. #include
5. #include //define O_WRONLY and O_RDONLY
6. #define SYSFS_GPIO_EXPORT "/sys/class/gpio/export"
7. #define SYSFS_GPIO_RST_PIN_MOTOER1"448"
8. #define SYSFS_GPIO_RST_DIR "/sys/class/gpio/gpio448/direction"
9. #define SYSFS_GPIO_RST_DIR_MOTOER1"OUT"
10. #define SYSFS_GPIO_RST_MOTOER1 "/sys/class/gpio/gpio448/value"
11. #define SYSFS_GPIO_RST_MOTOER1_H "1"
12. #define SYSFS_GPIO_RST_MOTOER1 _L "0"
14. #define SYSFS_GPIO_EXPORT "/sys/class/gpio/export"
15. #define SYSFS_GPIO_RST_PIN_MOTOER2 "450"
16. #define SYSFS_GPIO_RST_DIR "/sys/class/gpio/gpio448/direction"
17. #define SYSFS_GPIO_RST_DIR_MOTOER2 "OUT"
18. #define SYSFS_GPIO_RST_MOTOER2"/sys/class/gpio/gpio448/value"
19. #define SYSFS_GPIO_RST_MOTOER2 _H "1"
20. #define SYSFS_GPIO_RST_MOTOER2 _L "0"
22. int main()
23. {
24. int fd;
25. //打开端口/sys/class/gpio# echo 448 > export
26. fd = open(SYSFS_GPIO_EXPORT, O_WRONLY);
27. if(fd == -1)
28. {
29. printf("ERR: Radio hard reset pin open error.n");
30. return EXIT_FAILURE;
31. }
32. write(fd, SYSFS_GPIO_RST_PIN_MOTOER1,sizeof(SYSFS_GPIO_RST_PIN_MOTOER1));
33. close(fd);
34. //设置端口方向/sys/class/gpio/gpio448# echo out > direction
35. fd = open(SYSFS_GPIO_RST_DIR, O_WRONLY);
36. if(fd == -1)
37. {
38. printf("ERR: Radio hard reset pin direction open error.n");
39. return EXIT_FAILURE;
40. }
41. write(fd, SYSFS_GPIO_RST_DIR_MOTOER2 , sizeof(SYSFS_GPIO_RST_DIR_MOTOER2 ));
42. close(fd);
43. //设置端口方向/sys/class/gpio/gpio450# echo out > direction
44. fd = open(SYSFS_GPIO_RST_DIR, O_WRONLY);
45. if(fd == -1)
46. {
47. printf("ERR: Radio hard reset pin direction open error.n");
48. return EXIT_FAILURE;
49. }
50. write(fd, SYSFS_GPIO_RST_DIR_MOTOER2 , sizeof(SYSFS_GPIO_RST_DIR_MOTOER2 ));
51. close(fd);
55. //输出复位信号: 拉高>100ns
56. fd = open(SYSFS_GPIO_RST_MOTOER1, O_RDWR);
57. if(fd == -1)
58. {
59. printf("ERR: Radio hard reset pin value open error.n");
60. return EXIT_FAILURE;
61. }
62. while(1)
63. {
64. write(fd, SYSFS_GPIO_RST_MOTOER1 _H, sizeof(SYSFS_GPIO_RST_MOTOER1 _H));
65. write(fd, SYSFS_GPIO_RST_MOTOER2 _H, sizeof(SYSFS_GPIO_RST_MOTOER2 _H));
66. usleep(1000000);
67. write(fd, SYSFS_GPIO_RST_ MOTOER1 _H, sizeof(SYSFS_GPIO_RST_ MOTOER1 _H));
68. write(fd, SYSFS_GPIO_RST_ MOTOER2 _H, sizeof(SYSFS_GPIO_RST_ MOTOER2 _H));
69. usleep(1000000);
70. }
71. close(fd);
72. printf("INFO: Radio hard reset pin value open error.n");
73. return 0;
74. }

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