使用usb host读写u盘无效，求助

发布于 2020-07-02 14:10:38 浏览：1732 订阅该版

[tocm]

参考[这里](https://www.rt-thread.org/document/site/application-note/driver/usb/an0046-rtthread-driver-usbh/)，但是没有效果，流程如下

## 打开 usb host

- 打开 cubeMX，开启 USB_OTG, 使用 host 模式，生成代码，复制到项目
- 复制 main.c 里面的时钟配置到 board.c
- 修改 Kconfig，添加

```bash
config BSP_USING_USBD_FS
    bool "Enable OTGFS as USB host"
    select RT_USING_USB_HOST
    select BSP_USING_USBH
    default n
```

- 位置

```bash
 Hardware Drivers Config --->
   On-chip Peripheral Drivers， 启用 usb otg

RT-Thread Components --->
    Device Drivers --->
      Using USB --->
        [*] Using USB host
        [*] Enable Udisk Drivers
        (/)   Udisk mount dir
```

## 打开文件系统

- 位置

```bash
RT-Thread Components --->
  Device virtual file system --->
    [*]Using device virtual file system
```

- 配置参数

```bash
[*]Enable elm-chan fatfs
```

## 复制驱动

- 去 gitee 的 rt thread 的 master 分支里面找到 drv_usbh.c 和 drv_usbh.h， 放到项目的 libraries/HAL_Drivers 里面
- 修改，添加 libraries/HAL_Drivers/SConscript

```txt
if GetDepend(['BSP_USING_USBH']):
    src += ['drv_usbh.c']
```

6 个回答

andychen 2020-07-02

这家伙很懒，什么也没写！

921742079 2020-07-02

这家伙很懒，什么也没写！

921742079 2020-07-02

这家伙很懒，什么也没写！

921742079 2020-07-02

这家伙很懒，什么也没写！

现在问题是，u盘容量显示错误，导致无法mount
物理容量应该是32g，windows下显示28g，这里告诉我2047.1023GB
不知道应该怎么格式化，需要注意啥？
快速格式化和完全格式化都不行，给跪了

```bash
msh />reboot

\ | /
- RT -     Thread Operating System
 / | \     4.0.2 build Jul  2 2020
 2006 - 2019 Copyright by rt-thread team
msh />usb connected
port 1 status 0x10201
reset port
start enumnation
ok
pipe transform remain size,: 8
nak
nak
ok
pipe transform remain size,: 0
ok
reset port
rt_usb_set_address
ok
pipe transform remain size,: 0
ok
get device descriptor length 18
ok
pipe transform remain size,: 18
ok
pipe transform remain size,: 0
ok
Vendor ID 0x951
Product ID 0x1666
ok
pipe transform remain size,: 18
ok
pipe transform remain size,: 0
ok
ok
pipe transform remain size,: 32
ok
pipe transform remain size,: 0
ok
ok
pipe transform remain size,: 0
ok
rt_usb_get_interface_descriptor: 0
interface class 0x8, subclass 0x6
rt_usb_get_endpoint_descriptor: 0
rt_usb_get_endpoint_descriptor: 1
subclass 6, protocal 80
rt_usbh_storage_run
rt_usb_get_endpoint_descriptor: 0
rt_usb_get_endpoint_descriptor: 1
rt_usbh_storage_reset
ok
pipe transform remain size,: 0
ok
rt_usbh_storage_get_max_lun
ok
pipe transform remain size,: 1
ok
pipe transform remain size,: 0
ok
rt_usbh_storage_inquiry
pipe transform remain size,: 31
nak
ok
pipe transform remain size,: 36
ok
pipe transform remain size,: 13
ok
rt_usbh_storage_test_unit_ready
pipe transform remain size,: 31
ok
pipe transform remain size,: 13
ok
rt_usbh_storage_get_capacity
pipe transform remain size,: 31
ok
pipe transform remain size,: 8
ok
pipe transform remain size,: 13
ok
capicity 60604416, block size 512
read partition table
rt_usbh_storage_read10
pipe transform remain size,: 31
ok
pipe transform remain size,: 512
nak
ok
pipe transform remain size,: 448
ok
pipe transform remain size,: 384
ok
pipe transform remain size,: 320
ok
pipe transform remain size,: 256
ok
pipe transform remain size,: 192
ok
pipe transform remain size,: 128
ok
pipe transform remain size,: 64
ok
pipe transform remain size,: 13
ok
finished reading partition
found part[0], begin: 512, size: 2047.1023GB
rt_usbh_storage_read10
pipe transform remain size,: 31
ok
pipe transform remain size,: 512
ok
pipe transform remain size,: 448
ok
pipe transform remain size,: 384
ok
pipe transform remain size,: 320
ok
pipe transform remain size,: 256
ok
pipe transform remain size,: 192
ok
pipe transform remain size,: 128
ok
pipe transform remain size,: 64
ok
pipe transform remain size,: 13
ok
rt_usbh_storage_read10
pipe transform remain size,: 31
ok
pipe transform remain size,: 512
ok
pipe transform remain size,: 448
ok
pipe transform remain size,: 384
ok
pipe transform remain size,: 320
ok
pipe transform remain size,: 256
ok
pipe transform remain size,: 192
ok
pipe transform remain size,: 128
ok
pipe transform remain size,: 64
ok
pipe transform remain size,: 13
ok
udisk part 0 mount failed

```