ART -PI PWM5 1chanel 有谁是否验证可以使用呢

发布于 2020-12-06 00:07:25 浏览：997 订阅该版

按照填加外设驱动的方法，添加PWM5 -1 也就是对应板子上 PH10, 添加完成后用 pwm_led_sample 测试例子进行测试，
```c
#define LED_PIN_NUM          GET_PIN(H,10)//57      /* LED PIN脚编号，查看驱动文件drv_gpio.c确定 */
#define PWM_DEV_NAME        "pwm5"  /* PWM设备名称 */
#define PWM_DEV_CHANNEL     1       /* PWM通道 */
struct rt_device_pwm *pwm_dev;      /* PWM设备句柄 */

static int pwm_led_sample(int argc, char *argv[])
{
    rt_uint32_t period, pulse, dir;

period = 500000;    /* 周期为0.5ms，单位为纳秒ns */
    dir = 1;            /* PWM脉冲宽度值的增减方向 */
    pulse = 0;          /* PWM脉冲宽度值，单位为纳秒ns */

/* 设置LED引脚脚模式为输出 */
   // rt_pin_mode(LED_PIN_NUM, PIN_MODE_OUTPUT);
   // /* 拉高LED引脚 */
   // rt_pin_write(LED_PIN_NUM, PIN_HIGH);
    
    /* 查找设备 */
    pwm_dev = (struct rt_device_pwm *)rt_device_find(PWM_DEV_NAME);
    if (pwm_dev == RT_NULL)
    {
        rt_kprintf("pwm sample run failed! can't find %s device!\n", PWM_DEV_NAME);
        return RT_ERROR;
    }

/* 设置PWM周期和脉冲宽度默认值 */
    rt_pwm_set(pwm_dev, PWM_DEV_CHANNEL, period, pulse);
    /* 使能设备 */
    rt_pwm_enable(pwm_dev, PWM_DEV_CHANNEL);
    
    while (1)
    {
        rt_thread_mdelay(50);
        if (dir)
        {
            pulse += 5000;      /* 从0值开始每次增加5000ns */
        }
        else
        {
            pulse -= 5000;      /* 从最大值开始每次减少5000ns */
        }
        if (pulse >= period)
        {
            dir = 0;
        }
        if (0 == pulse)
        {
            dir = 1;
        }

/* 设置PWM周期和脉冲宽度 */
        rt_pwm_set(pwm_dev, PWM_DEV_CHANNEL, period, pulse);
    }
}
/* 导出到 msh 命令列表中 */
MSH_CMD_EXPORT(pwm_led_sample, pwm sample);
```
但是没有响应，有谁可以帮忙验证一下码？