UEFI 下查找USB设备

obins_Iee

于 2018-04-08 15:06:13 发布

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CC 4.0 BY-SA版权

分类专栏： BIOS\ACPI\UEFI\EC 文章标签： uefi

本文链接：https://blog.youkuaiyun.com/mini92/article/details/79852231

本文详细介绍了在UEFI系统下如何查找并操作USB设备，结合作者编译的.EFI执行文件，提供了实践指导。

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/**
  The user Entry Point for Application. The user code starts with this function
  as the real entry point for the application.

  @param[in] ImageHandle    The firmware allocated handle for the EFI image.  
  @param[in] SystemTable    A pointer to the EFI System Table.
  
  @retval EFI_SUCCESS       The entry point is executed successfully.
  @retval other             Some error occurs when executing this entry point.

**/
EFI_STATUS
EFIAPI
UefiMain (
  IN EFI_HANDLE        ImageHandle,
  IN EFI_SYSTEM_TABLE  *SystemTable
  )
{
    EFI_STATUS          Status;
    EFI_USB_IO_PROTOCOL *UsbIo;
    UINTN 		HandleIndex, NumHandles;
    EFI_HANDLE 	*ControllerHandle = NULL;
    
    //
    EFI_USB_DEVICE_DESCRIPTOR Device;
    
    gST->ConOut->OutputString (gST->ConOut, L"---------------------------------\r\n");
        
    gST->ConOut->ClearScreen(gST->ConOut);

    gST->ConOut->EnableCursor(gST->ConOut,TRUE);