packages\peripheral_samples-的PWM例程引脚问题

发布于 2021-10-09 09:31:39 浏览：1015 订阅该版

stm32F429IGTx 芯片创建工程，
![57_PWM.PNG](https://oss-club.rt-thread.org/uploads/20211009/88b77b60475a9f7cd5a8fd6f76217c73.png.webp)

![GIPO_PB1.PNG](https://oss-club.rt-thread.org/uploads/20211009/8f307adfcbd605a9423c2adc087ee7e5.png.webp)

![代码.PNG](https://oss-club.rt-thread.org/uploads/20211009/8f2db60a473ff5cdb4d64e771c6d7e9c.png.webp)

```c
/*
 * 程序清单：这是一个 PWM 设备使用例程
 * 例程导出了 pwm_led_sample 命令到控制终端
 * 命令调用格式：pwm_led_sample
 * 程序功能：通过 PWM 设备控制 LED 灯的亮度，可以看到LED不停的由暗变到亮，然后又从亮变到暗。
*/

#include <rtthread.h>
#include <rtdevice.h>

#define LED_PIN_NUM         57      /* LED PIN脚编号PB1，查看驱动文件drv_gpio.c确定 ,这里无法用GET_PIN(B,1)去替换*/
#define PWM_DEV_NAME        "pwm3"  /* PWM设备名称 */
#define PWM_DEV_CHANNEL     4       /* PWM通道 */
/------------------------其他地方使用-----------------------------------/
#include <rtthread.h>

#define DBG_TAG "main"
#define DBG_LVL DBG_LOG
#include <rtdbg.h>
#include <rtdevice.h>
#include <board.h>

/* defined the LED0 pin: PB1 */
#define LED0_PIN    GET_PIN(B, 0)//16
int main(void)
{
    int count = 1;
    rt_base_t pin_number=1;
    pin_number = rt_pin_get("PB.0");

rt_pin_mode(pin_number, PIN_MODE_OUTPUT);

while (count++)
       {
           rt_pin_write(LED0_PIN, PIN_HIGH);
           rt_thread_mdelay(500);
           rt_pin_write(LED0_PIN, PIN_LOW);
           rt_thread_mdelay(500);
       }

return RT_EOK;
}
```
求指导！！！！是bug么