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最近使用VS2005 SDK开发一个USB-HID的应用程序，现在对于hid设备能识别出来，creatfile也没问题，但是继续writefile的时候出问题，使用getlasterror返回值一直是0x57
代码和网上给的例程都是一致的，现在使用BusHound软件能够和hid设备通信，能观察到下发和上传的数据，这样能证明底层USB驱动没问题么？
我现在定位不了错误，不知道怎么继续解决了，希望大牛能帮我分析下
/* 1) Get the HID Globally Unique ID from the OS */
HidD_GetHidGuid(&HidGuid);
/* 2) Get an array of structures containing information about
all attached and enumerated HIDs */
HidDevInfo = SetupDiGetClassDevs(
&HidGuid,
NULL,
NULL,
DIGCF_PRESENT | DIGCF_INTERFACEDEVICE);
/* 3) Step through the attached device list 1 by 1 and examine
each of the attached devices. When there are no more entries in
the array of structures, the function will return FALSE. */
Index = 0; /* init to first index of array */
devInfoData.cbSize = sizeof(devInfoData); /* set to the size of the structure
that will contain the device info data */
do {
/* Get information about the HID device with the 'Index' array entry */
Result = SetupDiEnumDeviceInterfaces( HidDevInfo,
0,
&HidGuid,
Index,
&devInfoData);
/* If we run into this condition, then there are no more entries
to examine, we might as well return FALSE at point */
if(Result == FALSE)
{
/* free the memory allocated for DetailData */
if(detailData != NULL)
free(detailData);
/* free HID device info list resources */
SetupDiDestroyDeviceInfoList(HidDevInfo);
return FALSE;
}
if(GotRequiredSize == FALSE)
{
/* 3) Get the size of the DEVICE_INTERFACE_DETAIL_DATA
structure. The first call will return an error condition,
but we'll get the size of the strucure */
DIDResult = SetupDiGetDeviceInterfaceDetail( HidDevInfo,
&devInfoData,
NULL,
0,
&DataSize,
NULL);
GotRequiredSize = TRUE;
/* allocate memory for the HidDevInfo structure */
detailData = (PSP_DEVICE_INTERFACE_DETAIL_DATA) malloc(DataSize);
/* set the size parameter of the structure */
detailData->cbSize = sizeof(SP_DEVICE_INTERFACE_DETAIL_DATA);
}
/* 4) Now call the function with the correct size parameter. This
function will return data from one of the array members that
Step #2 pointed to. This way we can start to identify the
attributes of particular HID devices. */
DIDResult = SetupDiGetDeviceInterfaceDetail( HidDevInfo,
&devInfoData,
detailData,
DataSize,
&RequiredSize,
NULL);
/* 5) Open a file handle to the device. Make sure the
attibutes specify overlapped transactions or the IN
transaction may block the input thread. */
*HidDevHandle = CreateFile( detailData->DevicePath,
0,
FILE_SHARE_READ | FILE_SHARE_WRITE,
(LPSECURITY_ATTRIBUTES)NULL,
OPEN_EXISTING,
NULL,
NULL);
/* 6) Get the Device VID & PID to see if it's the device we want */
if(HidDevHandle != INVALID_HANDLE_VALUE)
{
HIDAttrib.Size = sizeof(HIDAttrib);
HidD_GetAttributes( *HidDevHandle, &HIDAttrib);
if((HIDAttrib.VendorID == VID) && (HIDAttrib.ProductID == PID))
{
hDev = CreateFile(
detailData->DevicePath,
GENERIC_WRITE,
FILE_SHARE_READ | FILE_SHARE_WRITE,
(LPSECURITY_ATTRIBUTES)NULL,
OPEN_EXISTING,
0, //for write
// FILE_FLAG_OVERLAPPED, //for read
NULL);
if(hDev == INVALID_HANDLE_VALUE){
DWORD err = GetLastError();
}else{
HIDP_CAPS Capabilities;
PHIDP_PREPARSED_DATA HidParsedData;
OVERLAPPED HidOverlapped;
HANDLE ReportEvent;
unsigned char* outbuffer[7] = 0;
unsigned char inbuffer[33] = {0};
DWORD numBytesReturned;
outbuffer[0] = 0x05;
outbuffer[1] = 0x07;
outbuffer[2] = 0x11;
outbuffer[3] = 0x22;
outbuffer[4] = 0x33;
outbuffer[5] = 0x44;
outbuffer[6] = 0x55;
HidD_GetPreparsedData(hDev, &HidParsedData);
/* extract the capabilities info */
HidP_GetCaps( HidParsedData ,&Capabilities);
/* Free the memory allocated when getting the preparsed data */
HidD_FreePreparsedData(HidParsedData);
if(!WriteFile(hDev,
outbuffer,
Capabilities.OutputReportByteLength,
&numBytesReturned,
NULL)){
DWORD err = GetLastError();
}
Capabilities.OutputReportByteLength的值是多少
这个值应该比你的下位机读取长度大1
Capabilities.OutputReportByteLength = 0x21
下面是下位机中的USB相关描述符
unsigned char code Config_Descriptor[0x0029] =
{
/* 1 single Config_Descriptor */
0x09, //bLength
0x02, //bDescriptorType
W2B(0x0029), //wTotalLength(09+09+36+07+07)
0x01, //bNumInterfaces
_BCFG_VALUE, //bConfigurationValue
0x00, //iConfiguration
0x00, //bmAttributes
0x32, //bMaxPower
/* 2 Interface Descriptor */
0x09, //bLength
0x04, //bDescriptorType
0x00, //bInterfaceNumber
0x00, //bAlternateSetting
0x02, //bNumEndpoints
0x03, //bInterfaceClass
0x00, //bInterfaceSubClass
0xff, //bInterfacePortocol
0x00, //iInterface
/* 3 HID Descriptor */
0x09, //HID DESCR
0x21,
0x00,
0x01,
0x21,
0x01,
0x22,
0x21,
0x00,
/* 4 Bulk-OUT Endpoint Descriptor */
0x07, //bLength
0x05, //bDescriptorType
0x82, //bEndpointAddress
0x03, //bmAttributes
W2B(0x0020), //wMaxPacketSize
0x01, //bInterval
/* 5 Bulk-IN Endpoint Descriptor */
0x07, //bLength
0x05, //bDescriptorType
0x02, //bEndpointAddress
0x03, //bmAttributes
W2B(0x0020), //wMaxPacketSize
0x01 //bInterval
};
unsigned char code HID_Descriptor[0x21] =
{
0x06,
0x00,
0xFF,
0x09,
0x01,
0xA1,
0x01,
0x19,
0x01,
0x29,
0x08,
0x15,
0x00,
0x26,
0xFF,
0x00,
0x75,
0x08,
0x95,
0x20,
0x81,
0x02,
0x19,
0x01,
0x29,
0x08,
0x75,
0x08,
0x95,
0x20,
0x91,
0x02,
0xC0
};
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