windows并口编程方法

#ifndef _PORTTALK_H_ #define _PORTTALK_H_ #include <winioctl.h> //--------------------------------------------------------------------------- //32768-65535 are reserved for customers #define PORTTALK_TYPE 40000 // The IOCTRL function codes from 0x800 to 0xFFF are for customer use #define IOCTL_IOPM_RESTRICT_ALL_ACCESS CTL_CODE(PORTTALK_TYPE, 0x900, METHOD_BUFFERED, FILE_ANY_ACCESS) #define IOCTL_IOPM_ALLOW_EXCUSIVE_ACCESS CTL_CODE(PORTTALK_TYPE, 0x901, METHOD_BUFFERED, FILE_ANY_ACCESS) #define IOCTL_SET_IOPM CTL_CODE(PORTTALK_TYPE, 0x902, METHOD_BUFFERED, FILE_ANY_ACCESS) #define IOCTL_ENABLE_IOPM_ON_PROCESSID CTL_CODE(PORTTALK_TYPE, 0x903, METHOD_BUFFERED, FILE_ANY_ACCESS) #define IOCTL_READ_PORT_UCHAR CTL_CODE(PORTTALK_TYPE, 0x904, METHOD_BUFFERED, FILE_ANY_ACCESS) #define IOCTL_WRITE_PORT_UCHAR CTL_CODE(PORTTALK_TYPE, 0x905, METHOD_BUFFERED, FILE_ANY_ACCESS) //--------------------------------------------------------------------------- bool OpenPortTalk(void); void ClosePortTalk(void); void outportb(unsigned short int PortAddress, unsigned char byte); unsigned char inportb(unsigned short int PortAddress); bool InstallPortTalkDriver(void); bool StartPortTalkDriver(void); //--------------------------------------------------------------------------- HANDLE PortTalk_Handle; //Handle for PortTalk Driver void outportb(unsigned short int PortAddress, unsigned char byte) { unsigned int error; DWORD BytesReturned; unsigned char Buffer[3]; unsigned short * pBuffer; pBuffer = (unsigned short *)&Buffer[0]; *pBuffer = PortAddress; Buffer[2] = byte; error = DeviceIoControl(PortTalk_Handle,IOCTL_WRITE_PORT_UCHAR,&Buffer,3,NULL,0,&BytesReturned,NULL); if(!error) ShowMessage("Error occured during outportb while talking to PortTalk driver"); } unsigned char inportb(unsigned short int PortAddress) { unsigned int error; DWORD BytesReturned; unsigned char Buffer[3]; unsigned short * pBuffer; pBuffer = (unsigned short *)&Buffer; *pBuffer = PortAddress; error = DeviceIoControl(PortTalk_Handle,IOCTL_READ_PORT_UCHAR,&Buffer,2,&Buffer,1,&BytesReturned,NULL); if(!error) ShowMessage("Error occured during inportb while talking to PortTalk driver"); return(Buffer[0]); } bool OpenPortTalk(void) { PortTalk_Handle = CreateFile("\\\\.\\PortTalk",GENERIC_READ,0,NULL,OPEN_EXISTING,FILE_ATTRIBUTE_NORMAL,NULL); if(PortTalk_Handle == INVALID_HANDLE_VALUE) { StartPortTalkDriver(); PortTalk_Handle = CreateFile("\\\\.\\PortTalk",GENERIC_READ,0,NULL,OPEN_EXISTING,FILE_ATTRIBUTE_NORMAL,NULL); if(PortTalk_Handle == INVALID_HANDLE_VALUE) return false; } return true; } void ClosePortTalk(void) { CloseHandle(PortTalk_Handle); } bool StartPortTalkDriver(void) { SC_HANDLE SchSCManager; SC_HANDLE schService; BOOL ret; DWORD err; SchSCManager = OpenSCManager (NULL,NULL,SC_MANAGER_ALL_ACCESS); if(SchSCManager == NULL) { if(GetLastError() == ERROR_ACCESS_DENIED) ShowMessage("安装驱动PortTalk.sys，需要管理员的权限！"); return false; } do{ schService = OpenService(SchSCManager,"PortTalk",SERVICE_ALL_ACCESS); if (schService == NULL) { switch(GetLastError()) { case ERROR_ACCESS_DENIED: return false; case ERROR_INVALID_NAME: return false; case ERROR_SERVICE_DOES_NOT_EXIST: InstallPortTalkDriver(); break; } } }while (schService == NULL); ret = StartService(schService,0,NULL); if(ret == NULL) return false; CloseServiceHandle (schService); return true; } bool InstallPortTalkDriver(void) { SC_HANDLE SchSCManager; SC_HANDLE schService; DWORD err; CHAR DriverFileName[80]; GetSystemDirectory(DriverFileName, 55); lstrcat(DriverFileName,"\\Drivers\\PortTalk.sys"); if(!CopyFile("PortTalk.sys", DriverFileName, FALSE)) return false; SchSCManager = OpenSCManager (NULL,NULL,SC_MANAGER_ALL_ACCESS); schService = CreateService (SchSCManager,"PortTalk","PortTalk",SERVICE_ALL_ACCESS,SERVICE_KERNEL_DRIVER,SERVICE_DEMAND_START,SERVICE_ERROR_NORMAL,"System32\\Drivers\\PortTalk.sys",NULL,NULL,NULL,NULL,NULL); if(schService == NULL) return false; CloseServiceHandle (schService); return true; } //--------------------------------------------------------------------------- #endif