| 56 | } |
| 57 | |
| 58 | static int hwtimer_sample(int argc, char *argv[]) |
| 59 | { |
| 60 | rt_uint8_t i; |
| 61 | rt_err_t ret = RT_EOK; |
| 62 | rt_hwtimerval_t timeout_s; /* 定时器超时值 */ |
| 63 | rt_hwtimer_mode_t mode = HWTIMER_MODE_ONESHOT; /* 定时器模式 */ |
| 64 | rt_device_t hw_dev = RT_NULL; /* 定时器设备句柄 */ |
| 65 | rt_hwtimer_t *hwtimer; |
| 66 | float t; |
| 67 | rt_uint8_t loop_cnt; /* 循环打印次数 */ |
| 68 | rt_hwtimerval_t overflow_tv; /* 定时器超时值 */ |
| 69 | rt_uint32_t timer_out_s; |
| 70 | |
| 71 | if ((argc != 4) || (rt_strcmp("oneshot", argv[2]) && rt_strcmp("period", argv[2]))) |
| 72 | { |
| 73 | _hwtimer_cmd_print_usage(); |
| 74 | return -RT_ERROR; |
| 75 | } |
| 76 | |
| 77 | /* 查找定时器设备 */ |
| 78 | hw_dev = rt_device_find(argv[1]); |
| 79 | if (hw_dev == RT_NULL) |
| 80 | { |
| 81 | rt_kprintf("hwtimer sample run failed! can't find %s device!\n", argv[1]); |
| 82 | return -RT_ERROR; |
| 83 | } |
| 84 | else |
| 85 | { |
| 86 | hwtimer = (rt_hwtimer_t *)hw_dev; |
| 87 | } |
| 88 | |
| 89 | /* 以读写方式打开设备 */ |
| 90 | ret = rt_device_open(hw_dev, RT_DEVICE_OFLAG_RDWR); |
| 91 | if (ret != RT_EOK) |
| 92 | { |
| 93 | rt_kprintf("open %s device failed!\n", argv[1]); |
| 94 | return ret; |
| 95 | } |
| 96 | |
| 97 | /* 设置模式 */ |
| 98 | if (0 == rt_strcmp(argv[2], "oneshot")) |
| 99 | { |
| 100 | mode = HWTIMER_MODE_ONESHOT; |
| 101 | loop_cnt = 1; |
| 102 | } |
| 103 | else if (0 == rt_strcmp(argv[2], "period")) |
| 104 | { |
| 105 | mode = HWTIMER_MODE_PERIOD; |
| 106 | loop_cnt = 5; |
| 107 | } |
| 108 | rt_device_control(hw_dev, HWTIMER_CTRL_MODE_SET, &mode); |
| 109 | |
| 110 | /* 设置超时回调函数 */ |
| 111 | rt_device_set_rx_indicate(hw_dev, timeout_cb); |
| 112 | |
| 113 | /* 设置定时器超时并启动定时器 */ |
| 114 | timeout_s.sec = atoi(argv[3]) / 1000U; /* 秒 */ |
| 115 | timeout_s.usec = (atoi(argv[3]) % 1000U) * 1000U; /* 微秒 */ |
nothing calls this directly
no test coverage detected