usb device,开启u盘功能,拷贝卡顿问题

发布于 2025-03-05 14:53:23 浏览：41 订阅该版

stm32f407芯片
flash芯片 w25q128
usb device接口,用的是PB14和PB15 HS_OTG

```c
#define BSP_USING_USBDEVICE
#define EP_MPS_64 0U
#define BSP_USBD_TYPE_HS
#define BSP_USBD_SPEED_HSINFS 1
```
hal初始化

```c
void HAL_PCD_MspInit(PCD_HandleTypeDef* pcdHandle)
{

GPIO_InitTypeDef GPIO_InitStruct = {0};
  if(pcdHandle->Instance==USB_OTG_FS)
  {
  /* USER CODE BEGIN USB_OTG_FS_MspInit 0 */

/* USER CODE END USB_OTG_FS_MspInit 0 */

__HAL_RCC_GPIOA_CLK_ENABLE();
    /**USB_OTG_FS GPIO Configuration
    PA11     ------> USB_OTG_FS_DM
    PA12     ------> USB_OTG_FS_DP
    */
    GPIO_InitStruct.Pin = GPIO_PIN_11|GPIO_PIN_12;
    GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
    GPIO_InitStruct.Pull = GPIO_NOPULL;
    GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
    GPIO_InitStruct.Alternate = GPIO_AF10_OTG_FS;
    HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);

/* USB_OTG_FS clock enable */
    __HAL_RCC_USB_OTG_FS_CLK_ENABLE();
  /* USER CODE BEGIN USB_OTG_FS_MspInit 1 */

/* USER CODE END USB_OTG_FS_MspInit 1 */
  }
  else if(pcdHandle->Instance==USB_OTG_HS)
  {
  /* USER CODE BEGIN USB_OTG_HS_MspInit 0 */

/* USER CODE END USB_OTG_HS_MspInit 0 */

__HAL_RCC_GPIOB_CLK_ENABLE();
    /**USB_OTG_HS GPIO Configuration
    PB14     ------> USB_OTG_HS_DM
    PB15     ------> USB_OTG_HS_DP
    */
    GPIO_InitStruct.Pin = GPIO_PIN_14|GPIO_PIN_15;
    GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
    GPIO_InitStruct.Pull = GPIO_NOPULL;
    GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
    GPIO_InitStruct.Alternate = GPIO_AF12_OTG_HS_FS;
    HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);

/* USB_OTG_HS clock enable */
    __HAL_RCC_USB_OTG_HS_CLK_ENABLE();
  /* USER CODE BEGIN USB_OTG_HS_MspInit 1 */

/* USER CODE END USB_OTG_HS_MspInit 1 */
  }
}
```
配置启用的虚拟串口和存储,设备名时w25,这个是spi通过sfud挂载的flashw25q128
![screenshot_image.png](https://oss-club.rt-thread.org/uploads/20250305/a781e60f090b785bbb3aaeae3fea9861.png.webp)

```c
int spi_flash_init(void)
{
    extern rt_err_t rt_hw_spi_device_attach(const char *bus_name, const char *device_name, GPIO_TypeDef* cs_gpiox, uint16_t cs_gpio_pin);
    rt_hw_spi_device_attach("spi1","spi10",GPIOG,GPIO_PIN_8);

rt_sfud_flash_probe("w25","spi10"); // 获取 sfud_dev

return RT_EOK;
}
INIT_DEVICE_EXPORT(spi_flash_init);
```

![screenshot_image.png](https://oss-club.rt-thread.org/uploads/20250305/3b7e32f66baf69009418ed3ededdb35b.png)

![screenshot_image.png](https://oss-club.rt-thread.org/uploads/20250305/ea1701ad8b95bc78f89668f71742e0f6.png)

启动后电脑可以识别u盘,也可以拷贝文件,但是向u盘拷贝文件时大概十几秒进度条会动一下然后再卡十几秒,不能连续写入
将存储设备换成sdio挂载的tf卡也是一样的
但是从u盘向外拷贝文件则不会卡,会连续走进度条
请大神分享问题是什么,谢谢!