Question

我正在开发适用于Windows和Mac的USB HID引导程序应用程序，我在开发应用程序时使用了LUFA库作为参考。我已经使用ARM芯片开发了该设备，现在正在使用主机应用程序。我的Mac主机应用程序正常运行，但我遇到了Windows主机应用程序的问题。

当我运行Windows主机应用时，我在调用HidD_SetFeature和WriteFile时无法获得有效的结果。但是，我可以从我的HID设备获取属性（HidD_GetAttributes，HidD_GetSerialNumberString，HidD_SetNumInputBuffers，HidD_GetPreparsedData，HidP_GetCaps）。

我不确定为什么我的写入会继续返回0 / false但我通常会得到错误6或23.这6个错误代码令人困惑，因为那是ERROR_INVALID_HANDLE但我能够获得所有其他属性使用相同的句柄。从HID库加载或者我是如何打开句柄的，我有什么不正确的做法吗？或者我的HID报告描述符很时髦？

谢谢！

我的加载功能：

typedef BOOLEAN(__stdcall *HidD_GetAttributes_)(HANDLE device, PHIDD_ATTRIBUTES attrib);
typedef BOOLEAN(__stdcall *HidD_GetSerialNumberString_)(HANDLE device, PVOID buffer, ULONG buffer_len);
typedef BOOLEAN(__stdcall *HidD_SetFeature_)(HANDLE handle, PVOID data, ULONG length);
typedef BOOLEAN(__stdcall *HidD_GetFeature_)(HANDLE handle, PVOID data, ULONG length);
typedef BOOLEAN(__stdcall *HidD_GetPreparsedData_)(HANDLE handle, PHIDP_PREPARSED_DATA *preparsed_data);
typedef BOOLEAN(__stdcall *HidD_FreePreparsedData_)(PHIDP_PREPARSED_DATA preparsed_data);
typedef NTSTATUS(__stdcall *HidP_GetCaps_)(PHIDP_PREPARSED_DATA preparsed_data, HIDP_CAPS *caps);
typedef BOOLEAN(__stdcall *HidD_SetNumInputBuffers_)(HANDLE handle, ULONG number_buffers);

static HidD_GetAttributes_ HidD_GetAttributes;
static HidD_GetSerialNumberString_ HidD_GetSerialNumberString;
static HidD_SetFeature_ HidD_SetFeature;
static HidD_GetFeature_ HidD_GetFeature;
static HidD_GetPreparsedData_ HidD_GetPreparsedData;
static HidD_FreePreparsedData_ HidD_FreePreparsedData;
static HidP_GetCaps_ HidP_GetCaps;
static HidD_SetNumInputBuffers_ HidD_SetNumInputBuffers;

void load_library_functions() {
     lib_handle = LoadLibraryA("hid.dll");
     HidD_GetAttributes = (HidD_GetAttributes_)(GetProcAddress(lib_handle, "HidD_GetAttributes");
     HidD_GetSerialNumberString = (HidD_GetSerialNumberString_)(GetProcAddress(lib_handle, "HidD_GetSerialNumberString");
     HidD_SetFeature = (HidD_SetFeature_)(GetProcAddress(lib_handle, "HidD_SetFeature");
     HidD_GetFeature = (HidD_GetFeature_)(GetProcAddress(lib_handle, "HidD_GetFeature");
     HidD_GetPreparsedData = (HidD_GetPreparsedData_)(GetProcAddress(lib_handle, "HidD_GetPreparsedData");        
     HidD_FreePreparsedData = (HidD_FreePreparsedData_)(GetProcAddress(lib_handle, "HidD_FreePreparsedData");
     HidP_GetCaps = (HidP_GetCaps_)(GetProcAddress(lib_handle, "HidP_GetCaps");
     HidD_SetNumInputBuffers = (HidD_SetNumInputBuffers_)(GetProcAddress(lib_handle, "HidD_SetNumInputBuffers");
}

以及我如何打开设备的句柄：

// Open handle to device
Handle write_handle = CreateFile(device_interface_detail_data->DevicePath,
                                (GENERIC_READ | GENERIC_WRITE),                 
                                (FILE_SHARE_READ | FILE_SHARE_WRITE),           
                                NULL,
                                OPEN_EXISTING,
                                FILE_FLAG_OVERLAPPED,/*FILE_ATTRIBUTE_NORMAL,*/
                                NULL);

由于HID报告描述符出现奇怪的事情：

{
    // Undefined user page
    0x06, 0x00, 0xFF,
    // Usage (vendor defined)
    0x09, 0x01,
    // Collection Start
    0xA1, 0x01,
    // Usage (2)
    0x09, 0x02,
    // Logical Minimum, 0
    0x14, 0x00,
    // Logical Maximum, -1
    0x24, 0xFF, 
    // Report Size, 8 bits
    0x75, 0x08,
    // Report Count, 64 fields
    0x95, 0x40,
    // FEATURE definition
    0xB1, 0x02
    // Usage (3)
    0x09, 0x03,
    // Logical Minimum, 0
    0x14, 0x00,
    // Logical Maximum, -1
    0x24, 0xFF, 
    // Report Size, 8 bits
    0x75, 0x08,
    // Report Count, 64 fields
    0x95, 0x40,
    // INPUT definition
    0x81, 0x02,
    // Usage (4)
    0x09, 0x04,
    // Logical Minimum, 0
    0x14, 0x00,
    // Logical Maximum, -1
    0x24, 0xFF, 
    // Report Size, 8 bits
    0x75, 0x08,
    // Report Count, 256 fields
    0x96, 0x00, 0x10
    // OUTPUT definition
    0x91, 0x02,        
    // End Collection
    0xC1
}

HidD_SetFeature和WriteFile总是返回0

0 个答案: