潘多拉用TIM CHI 做PWM输出，程序编译无错误，但没输出

发布于 2019-08-27 22:15:00 浏览：1299 订阅该版

**1、cube配置，生成代码**
![110,0](https://www.rt-thread.org/qa/forum.php?mod=image&aid=10422&size=300x300&key=c1865573b9195db2&nocache=yes&type=fixnone)

**2、修改kconfig文件****
![110,0](https://www.rt-thread.org/qa/forum.php?mod=image&aid=10423&size=300x300&key=a9b50057910bacb8&nocache=yes&type=fixnone)
**
**3、env配置PWM1 CH1****
![110,0](https://www.rt-thread.org/qa/forum.php?mod=image&aid=10424&size=300x300&key=202395f133a6272d&nocache=yes&type=fixnone)
**
**4、修改驱动**

![110,0](https://www.rt-thread.org/qa/forum.php?mod=image&aid=10425&size=300x300&key=73c2c31cfafbad44&nocache=yes&type=fixnone)

![110,0](https://www.rt-thread.org/qa/forum.php?mod=image&aid=10426&size=300x300&key=d385ec298fd084d0&nocache=yes&type=fixnone)

![110,0](https://www.rt-thread.org/qa/forum.php?mod=image&aid=10427&size=300x300&key=de50beb2de3d325b&nocache=yes&type=fixnone)

5、线程例程
```c
#include <rtthread.h>
#include <drivers/rt_drv_pwm.h>

#define PWM_DEV_NAME            "pwm1"  /* PWM设备名称 */
#define PWM_DEV_CHANNEL         1     /* PWM通道 */
#define THREAD_PRIORITY         25      /* 线程优先级 */
#define THREAD_STACK_SIZE       512     /* 线程栈大小 */
#define THREAD_TIMESLICE        5       /* 线程时间片大小 */

static rt_thread_t tid1 = RT_NULL;      /* 线程句柄 */
struct rt_device_pwm *pwm_dev;          /* PWM设备句柄 */
static rt_uint32_t period = 500000;     /* 周期为0.5ms，单位为纳秒ns */
static rt_uint32_t pulse =  250000;           /* PWM脉冲宽度值的增减方向 */
														
/* 线程 pwm_entry 的入口函数 */
static void pwm_entry(void *parameter)
{
    rt_uint32_t count = 0;

while (1)
 {
 rt_thread_mdelay(50);
			 rt_kprintf("pwm out pulse=%d ", pulse);
 /* step 2、设置 PWM 周期和脉冲宽度，输出特定的波形 */
 rt_pwm_set(pwm_dev, PWM_DEV_CHANNEL, period, pulse);
 }
 /* step 3、如果不再使用该通道，可以关闭 PWM 通道的输出 */
 // rt_pwm_disable(pwm_dev, PWM_DEV_CHANNEL);
}

static int pwm_test(int argc, char *argv[])
{
	rt_err_t sate1;
 /* step 1.1、查找 PWM 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! ", PWM_DEV_NAME);
 return RT_ERROR;
 }
		 rt_kprintf("pwm sample run success! find %s device! ", PWM_DEV_NAME);
 /* step 1.2、设置 PWM 周期和脉冲宽度默认值 */
 sate1=rt_pwm_set(pwm_dev, PWM_DEV_CHANNEL, period, pulse);
		 rt_kprintf("sate1=%d ", sate1);
 /* step 1.3、使能 PWM 设备的输出通道 */
 sate1=rt_pwm_enable(pwm_dev, PWM_DEV_CHANNEL);
		rt_kprintf("sate2=%d ", sate1);

/* 创建线程，名称是 pwm_thread ，入口是 pwm_entry*/
    tid1 = rt_thread_create("pwm_thread",
                             pwm_entry,
                             RT_NULL,
                             THREAD_STACK_SIZE,
                             THREAD_PRIORITY,
                             THREAD_TIMESLICE);

/* 如果获得线程控制块，启动这个线程 */
    if (tid1 != RT_NULL)
        rt_thread_startup(tid1);

return RT_EOK;
}
/* 导出到 msh 命令列表中 */
MSH_CMD_EXPORT(pwm_test, pwm sample);
```

6、现象
发送 pwm_test命令 ，返回

![110,0](https://www.rt-thread.org/qa/forum.php?mod=image&aid=10428&size=300x300&key=7d0d17937baff484&nocache=yes&type=fixnone)

但是板子上的灯没有反应

各位大佬，求找找问题！万分感谢！！！！