用VC++實(shí)現(xiàn)USB接口讀寫數(shù)據(jù)的程序

1、用VC+實(shí)現(xiàn)USB接口讀寫數(shù)據(jù)的程序2009-08-15 11:55用VC+實(shí)現(xiàn)USB接口讀寫數(shù)據(jù)的程序使用一個(gè) GUIDguidHID_1查找并打開(kāi)一個(gè) USB設(shè)備extern C int PASCAL SearchUSBDevice()HANDLE hUsb;int nCount, i, j;/標(biāo)記同一設(shè)備個(gè)數(shù)HDEVINFO hDevInfoSet;BOOL bResult;PSP_DEVICE_INTERFACE_DETAIL_DATA pDetail =NULL;memset(m_sysversion, 0, 20);GetSysVersion(m_sysversion);/檢索相關(guān)

2、GUID的USB設(shè)備總設(shè)備個(gè)數(shù)if (!GetUSBList()return 0;/取得一個(gè)該GUID相關(guān)的設(shè)備信息集句柄hDevInfoSet = :SetupDiGetClassDevs(LPGUID)&guidHID_1,/GUID_CLASS_USB_DEVICE, / class GUIDNULL, / 無(wú)關(guān)鍵字NULL, / 不指定父窗口句柄DIGCF_PRESENT | DIGCF_DEVICEINTERFACE); / 目前存在的設(shè)備/ 失敗 .if (hDevInfoSet = INVALID_HANDLE_VALUE)return NULL;/ 申請(qǐng)?jiān)O(shè)備接口數(shù)據(jù)空間nCou

3、nt = 0;bResult = TRUE;for (i=0; icbSize = sizeof(SP_DEVICE_INTERFACE_DETAIL_DATA); bResult = SetupDiGetInterfaceDeviceDetail( hDevInfoSet, / 設(shè)備信息集句柄&ifdata, /設(shè)備接口信息pDetail, / 設(shè)備接口細(xì)節(jié)(設(shè)備路徑) predictedLength, /輸出緩沖區(qū)大小&requiredLength, /不需計(jì)算輸出緩沖區(qū)大小 ( 直接用設(shè)定值 )NULL); / 不需額外的設(shè)備描述if (bResult)/ 復(fù)制設(shè)備路徑到輸出緩沖區(qū)/:s

4、trcpy(pszDevicePathnCount, pDetail-DevicePath);if (strcmp(m_sysversion, winnt)=0)char ch18;for(i=0;iDevicePath+8+i);ch17=0;if (strcmp(ch,vid_0471&pid_0666)=0)/ 比較版本號(hào)，防止意外出錯(cuò) memset( &READ_OS, 0, sizeof( OVERLAPPED ) ) ;memset( &WRITE_OS, 0, sizeof( OVERLAPPED ) ) ;READ_OS.hEvent = CreateEvent( NULL,

5、/ no securityTRUE, / explicit reset reqFALSE, / initial event resetNULL ) ; / no nameif (READ_OS.hEvent = NULL)break;WRITE_OS.hEvent = CreateEvent( NULL, / no securityTRUE, / explicit reset reqFALSE, / initial event resetNULL ) ; / no nameif (NULL = WRITE_OS.hEvent)CloseHandle( READ_OS.hEvent );brea

6、k;hUsb=CreateFile(pDetail-DevicePath,/&guidHID_1,/GENERIC_READ|GENERIC_WRITE,FILE_SHARE_READ|FILE_SHARE_WRITE,NULL,OPEN_EXISTING,FILE_ATTRIBUTE_NORMAL/*|FILE_FLAG_OVERLAPPED*/,NULL);if (hUsb != NULL)/比較定位找到的USB在哪個(gè)USB PORTtchar id30; memset(id, 0, 30);i=0;do id=*(pDetail-DevicePath+26+i);i+; while(id

7、!=#);id = 0;for (j=0; jDevicePath); m_USBPositionMapnCount = j+1;break;CloseHandle(hUsb); nCount+;/ break;/ 比較驅(qū)動(dòng)版本/ 比較操作系統(tǒng)版本elsememset( &READ_OS, 0, sizeof( OVERLAPPED ) ) ; memset( &WRITE_OS, 0, sizeof( OVERLAPPED ) ) ;READ_OS.hEvent = CreateEvent( NULL, / no security TRUE, / explicit reset reqFALS

8、E, / initial event resetNULL ) ; / no nameif (READ_OS.hEvent = NULL) break;WRITE_OS.hEvent = CreateEvent( NULL, / no securityTRUE, / explicit reset reqFALSE, / initial event resetNULL ) ; / no nameif (NULL = WRITE_OS.hEvent)CloseHandle( READ_OS.hEvent );break;hUsb=CreateFile(pDetail-DevicePath,/&gui

9、dHID_1,/GENERIC_READ|GENERIC_WRITE,FILE_SHARE_READ|FILE_SHARE_WRITE,NULL,OPEN_EXISTING,FILE_ATTRIBUTE_NORMAL/*|FILE_FLAG_OVERLAPPED*/,NULL);if (hUsb != NULL)if(strcmp(pDetail-DevicePath, m_USBListj)=0)sprintf(m_DeviceDescj+1, %s, pDetail-DevicePath);m_USBPositionMapnCount = j+1;break;CloseHandle(hUs

10、b);nCount+;/ break;/ 釋放設(shè)備接口數(shù)據(jù)空間:GlobalFree(pDetail);/ 關(guān)閉設(shè)備信息集句柄:SetupDiDestroyDeviceInfoList(hDevInfoSet);iDeviceCount = nCount;return nCount;/ 寫B(tài)OOL Writestr(char *buf,int buflen, int index)BOOL fWriteStat;DWORD dwErrorFlags;DWORD dwError;COMSTAT ComStat; char szError 10 ;DWORD ret; int len, i, j,

11、packet; div_t div_result;BYTE sendpacket65;BYTE xorcode=0x00;if (m_gphdComindex = NULL) / no usb device(jk100c) return -1;div_result = div(buflen, 58);if (div_result.rem = 0) packet = div_result.quot; else packet = div_result.quot+1;for (i=0; ipacket; i+) memset(sendpacket, 0, 65);if(i=packet-1)/ en

12、d packetif (div_result.rem = 0) len = 58; elselen = div_result.rem;else len = 58;sendpacket0 = 0x13;sendpacket1 = 3+len;sendpacket2 = 0x01;sendpacket3 = packet*16+i+1;memcpy(sendpacket+4, buf+(i*58), len);for(j=0;jlen+3;j+)xorcodeA=se ndpacketj+1;sendpacketlen+4 = (char)xorcode;sendpacketlen+5 = 0x2

13、3;PurgeComm(m_gphdComindex,PURGE_RXCLEAR|PURGE_TXCLEAR); / Sleep(10);fWriteStat = WriteFile(m_gphdComindex, sendpacket, len+6,&ret, NULL);if (!fWriteStat)if(GetLastError() = ERROR_IO_PENDING)dwError = GetLastError();/ an error occurred, try to recoverwsprintf( szError, nr , dwError ) ; OutputDebugSt

14、ring(szError);ClearCommError(m_gphdComindex, &dwErrorFlags, &ComStat ) ;if (dwErrorFlags 0)wsprintf( szError, nr , dwErrorFlags ) ;OutputDebugString(szError);else/ some other error occurredClearCommError(m_gphdComindex, &dwErrorFlags, &ComStat ) ;if (dwErrorFlags 0)wsprintf( szError, nr , dwErrorFla

15、gs ) ;OutputDebugString(szError);return FALSE;if (i != packet-1)/ should be receive ackif (ReceivePacketAnswer(index) != 0)return FALSE;return TRUE;/ 讀int Readstr(char *buf,int nMaxLength, int index)BOOL fReadStat ;COMSTAT ComStat;DWORD dwErrorFlags;DWORD dwLength;DWORD dwError;char szError 10 ;if (

16、fCOMMOpened=0)return FALSE; / 串口未打開(kāi)/ only try to read number of bytes in queue ClearCommError(m_gphdComindex, &dwErrorFlags, &ComStat) ;/dwLength = min( (DWORD) nMaxLength, ComStat.cbInQue ) ;dwLength=nMaxLength;if (dwLength 0)if (olap=TRUE)fReadStat = ReadFile(m_gphdComindex,buf, dwLength, &dwLengt

17、h,&READ_OS) ; if (!fReadStat)if (GetLastError() = ERROR_IO_PENDING)OutputDebugString(nrIO Pending);while(!GetOverlappedResult(m_gphdComindex, &READ_OS, &dwLength, TRUE )dwError = GetLastError();if(dwError = ERROR_IO_INCOMPLETE) continue;else/ an error occurred, try to recoverClearCommError(m_gphdCom

18、index,&dwErrorFlags, &ComStat ) ; break;else / endif (GetLastError() = ERROR_IO_PENDING)/ some other error occurreddwLength = 0 ;ClearCommError(m_gphdComindex, &dwErrorFlags, &ComStat ) ;if (dwErrorFlags 0)wsprintf( szError, nr , dwErrorFlags ) ; OutputDebugString(szError); / endif (!fReadStat) / endif (olap=TRUE)elsefReadStat = ReadFile( m_gphdComindex,buf