Function encoder_sample

bsp/hc32/tests/test_pulse_encoder.c:163–222

}

static int encoder_sample(int argc, char **argv)
{
    rt_int32_t count;

    if ((argc != 4))
    {
        _pulse_cmd_print_usage();
        return -RT_ERROR;
    }

    rt_pin_mode(TEST_IO_A_PIN, PIN_MODE_OUTPUT);
    rt_pin_mode(TEST_IO_B_PIN, PIN_MODE_OUTPUT);

    pulse_encoder_dev = rt_device_find(argv[1]);
    if (pulse_encoder_dev == RT_NULL)
    {
        rt_kprintf("encoder_sample run failed! can't find %s device!\n", argv[1]);
        _pulse_cmd_print_usage();
        return -RT_ERROR;
    }
    rt_device_open(pulse_encoder_dev, RT_DEVICE_OFLAG_RDONLY);
    rt_device_control(pulse_encoder_dev, PULSE_ENCODER_CMD_CLEAR_COUNT, RT_NULL);
    rt_device_control(pulse_encoder_dev, PULSE_ENCODER_CMD_ENABLE, RT_NULL);

    /* 自测DISABLE和CLEAR功能 */
    GenClkUp(100);
    rt_device_control(pulse_encoder_dev, PULSE_ENCODER_CMD_DISABLE, RT_NULL);
    /* 测试DISABLE后是否还会计数 */
    GenClkUp(10);
    rt_device_read(pulse_encoder_dev, 0, &count, 1);
    rt_device_control(pulse_encoder_dev, PULSE_ENCODER_CMD_CLEAR_COUNT, RT_NULL);
    if (count != 100)
    {
        rt_kprintf("**************Self-test failed**************\n");
        rt_device_close(pulse_encoder_dev);
        _pulse_cmd_print_usage();
        return -RT_ERROR;
    }
    else
    {
        rt_kprintf("**************Self-test success**************\n");
        rt_device_control(pulse_encoder_dev, PULSE_ENCODER_CMD_ENABLE, RT_NULL);
        GenClkUp(atoi(argv[2]));
        GenClkDown(atoi(argv[3]));

        rt_device_read(pulse_encoder_dev, 0, &count, 1);
        if (count == (atoi(argv[2]) - atoi(argv[3])))
        {
            rt_kprintf("encoder_sample test success\n");
        }
        else
        {
            rt_kprintf("encoder_sample test failed\n");
        }

        rt_device_close(pulse_encoder_dev);
    }