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楼主 |
发表于 2007-3-8 22:25:45
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【83楼】的源码中的核心代码HID部分，是usb-windows.c
/* Name: usb-windows.c
* Project: usbcalls library
* Author: Christian Starkjohann
* Creation Date: 2006-02-02
* Tabsize: 4
* Copyright: (c) 2006 by OBJECTIVE DEVELOPMENT Software GmbH
* License: Proprietary, free under certain conditions. See Documentation.
* This Revision: $Id: usb-windows.c 137 2006-02-20 18:04:09Z cs $
*/
/*
General Description:
This module implements USB HID report receiving and sending with native
Windows API functions. If you compile with MinGW, no software from Microsoft
(no DDK) is needed. We supply the missing types and function prototypes in
hidsdi.h.
*/
#include <stdio.h>
#include <windows.h>
#include <setupapi.h>
#include "hidsdi.h"
#include <ddk/hidpi.h>
#include "usbcalls.h"
#ifdef DEBUG
#define DEBUG_PRINT(arg) printf arg
#else
#define DEBUG_PRINT(arg)
#endif
/* ------------------------------------------------------------------------ */
static void convertUniToAscii(char *buffer)
{
unsigned short *uni = (void *)buffer;
char *ascii = buffer;
while(*uni != 0){
if(*uni >= 256){
*ascii++ = '?';
}else{
*ascii++ = *uni++;
}
}
*ascii++ = 0;
}
int usbOpenDevice(usbDevice_t **device, int vendor, char *vendorName, int product, char *productName, int usesReportIDs)
{
GUID hidGuid; /* GUID for HID driver */
HDEVINFO deviceInfoList;
SP_DEVICE_INTERFACE_DATA deviceInfo;
SP_DEVICE_INTERFACE_DETAIL_DATA *deviceDetails = NULL;
DWORD size;
int i, openFlag = 0; /* may be FILE_FLAG_OVERLAPPED */
int errorCode = USB_ERROR_NOTFOUND;
HANDLE handle = INVALID_HANDLE_VALUE;
HIDD_ATTRIBUTES deviceAttributes;
HidD_GetHidGuid(&hidGuid);
deviceInfoList = SetupDiGetClassDevs(&hidGuid, NULL, NULL, DIGCF_PRESENT | DIGCF_INTERFACEDEVICE);
deviceInfo.cbSize = sizeof(deviceInfo);
for(i=0;;i++){
if(handle != INVALID_HANDLE_VALUE){
CloseHandle(handle);
handle = INVALID_HANDLE_VALUE;
}
if(!SetupDiEnumDeviceInterfaces(deviceInfoList, 0, &hidGuid, i, &deviceInfo))
break; /* no more entries */
/* first do a dummy call just to determine the actual size required */
SetupDiGetDeviceInterfaceDetail(deviceInfoList, &deviceInfo, NULL, 0, &size, NULL);
if(deviceDetails != NULL)
free(deviceDetails);
deviceDetails = malloc(size);
deviceDetails->cbSize = sizeof(*deviceDetails);
/* this call is for real: */
SetupDiGetDeviceInterfaceDetail(deviceInfoList, &deviceInfo, deviceDetails, size, &size, NULL);
DEBUG_PRINT(("checking HID path \"%s\"
", deviceDetails->DevicePath));
/* attempt opening for R/W -- we don't care about devices which can't be accessed */
handle = CreateFile(deviceDetails->DevicePath, GENERIC_READ|GENERIC_WRITE, FILE_SHARE_READ|FILE_SHARE_WRITE, NULL, OPEN_EXISTING, openFlag, NULL);
if(handle == INVALID_HANDLE_VALUE){
DEBUG_PRINT(("opening failed: %d
", (int)GetLastError()));
/* errorCode = USB_ERROR_ACCESS; opening will always fail for mouse -- ignore */
continue;
}
deviceAttributes.Size = sizeof(deviceAttributes);
HidD_GetAttributes(handle, &deviceAttributes);
DEBUG_PRINT(("device attributes: vid=%d pid=%d
", deviceAttributes.VendorID, deviceAttributes.ProductID));
if(deviceAttributes.VendorID != vendor || deviceAttributes.ProductID != product)
continue; /* ignore this device */
errorCode = USB_ERROR_NOTFOUND;
if(vendorName != NULL && productName != NULL){
char buffer[512];
if(!HidD_GetManufacturerString(handle, buffer, sizeof(buffer))){
DEBUG_PRINT(("error obtaining vendor name
"));
errorCode = USB_ERROR_IO;
continue;
}
convertUniToAscii(buffer);
DEBUG_PRINT(("vendorName = \"%s\"
", buffer));
if(strcmp(vendorName, buffer) != 0)
continue;
if(!HidD_GetProductString(handle, buffer, sizeof(buffer))){
DEBUG_PRINT(("error obtaining product name
"));
errorCode = USB_ERROR_IO;
continue;
}
convertUniToAscii(buffer);
DEBUG_PRINT(("productName = \"%s\"
", buffer));
if(strcmp(productName, buffer) != 0)
continue;
}
break; /* we have found the device we are looking for! */
}
SetupDiDestroyDeviceInfoList(deviceInfoList);
if(deviceDetails != NULL)
free(deviceDetails);
if(handle != INVALID_HANDLE_VALUE){
*device = (usbDevice_t *)handle;
errorCode = 0;
}
return errorCode;
}
/* ------------------------------------------------------------------------ */
void usbCloseDevice(usbDevice_t *device)
{
CloseHandle((HANDLE)device);
}
/* ------------------------------------------------------------------------ */
int usbSetReport(usbDevice_t *device, int reportType, char *buffer, int len)
{
HANDLE handle = (HANDLE)device;
BOOLEAN rval = 0;
DWORD bytesWritten;
switch(reportType){
case USB_HID_REPORT_TYPE_INPUT:
break;
case USB_HID_REPORT_TYPE_OUTPUT:
rval = WriteFile(handle, buffer, len, &bytesWritten, NULL);
break;
case USB_HID_REPORT_TYPE_FEATURE:
rval = HidD_SetFeature(handle, buffer, len);
break;
}
return rval == 0 ? USB_ERROR_IO : 0;
}
/* ------------------------------------------------------------------------ */
int usbGetReport(usbDevice_t *device, int reportType, int reportNumber, char *buffer, int *len)
{
HANDLE handle = (HANDLE)device;
BOOLEAN rval = 0;
DWORD bytesRead;
switch(reportType){
case USB_HID_REPORT_TYPE_INPUT:
buffer[0] = reportNumber;
rval = ReadFile(handle, buffer, *len, &bytesRead, NULL);
if(rval)
*len = bytesRead;
break;
case USB_HID_REPORT_TYPE_OUTPUT:
break;
case USB_HID_REPORT_TYPE_FEATURE:
buffer[0] = reportNumber;
rval = HidD_GetFeature(handle, buffer, *len);
break;
}
return rval == 0 ? USB_ERROR_IO : 0;
}
/* ------------------------------------------------------------------------ */
至于界面，你可以使用VC的MFC编写也可以用C++ Builder
上面的代码应该不会很复杂，关键要理解HID的协议部份。
关于我的MFC源码帖子上其实已经有了，在【44楼】
只不过是将libusb0的驱动部分改为HID，使用的就以上源码 |
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发表于 2006-7-6 21:27:43
