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WinIo.c
资源名称：winio源码.zip　[点击查看]
上传用户：ason123
上传日期：2010-03-31
资源大小：177k
文件大小：2k
源码类别：

并口编程

开发平台：

C++ Builder

WinIo.c：源码内容
  1. // ---------------------------------------------------- //
  2. //                      WinIo v2.0                      //
  3. //  Direct Hardware Access Under Windows 9x/NT/2000/XP  //
  4. //           Copyright 1998-2002 Yariv Kaplan           //
  5. //               http://www.internals.com               //
  6. // ---------------------------------------------------- //
  8. #define DEVICE_MAIN
  10. #include "winio_9x.h"
  12. #undef DEVICE_MAIN
  14. #include "winio.h"
  16. Declare_Virtual_Device(WINIO)
  18. DefineControlHandler(SYS_DYNAMIC_DEVICE_INIT, OnSysDynamicDeviceInit);
  19. DefineControlHandler(SYS_DYNAMIC_DEVICE_EXIT, OnSysDynamicDeviceExit);
  20. DefineControlHandler(W32_DEVICEIOCONTROL, OnW32DeviceIoControl);
  22. BOOL ControlDispatcher(DWORD dwControlMessage, DWORD EBX, DWORD EDX, DWORD ESI, DWORD EDI, DWORD ECX)
  23. {
  24.   START_CONTROL_DISPATCH
  26.   ON_SYS_DYNAMIC_DEVICE_INIT(OnSysDynamicDeviceInit);
  27.   ON_SYS_DYNAMIC_DEVICE_EXIT(OnSysDynamicDeviceExit);
  28.   ON_W32_DEVICEIOCONTROL(OnW32DeviceIoControl);
  30.   END_CONTROL_DISPATCH
  32.   return TRUE;
  33. }
  36. BOOL OnSysDynamicDeviceInit()
  37. {
  38.   return TRUE;
  39. }
  42. BOOL OnSysDynamicDeviceExit()
  43. {
  44.   return TRUE;
  45. }
  48. DWORD OnW32DeviceIoControl(PIOCTLPARAMS p)
  49. {
  50.   struct tagPort32Struct *pPort32Struct;
  51.   unsigned int *pdwPortVal;
  53.   switch (p->dioc_IOCtlCode)
  54.   {
  55.     case DIOC_OPEN:
  56.     case DIOC_CLOSEHANDLE:
  57.     break;
  59.     case WINIO_WRITEPORT:
  60.       
  61.       pPort32Struct = p->dioc_InBuf;
  63.       switch (pPort32Struct->bSize)
  64.       {
  65.         case 1:
  66.           _outp(pPort32Struct->wPortAddr, pPort32Struct->dwPortVal);
  67.         break;
  69.         case 2:
  70.           _outpw(pPort32Struct->wPortAddr, pPort32Struct->dwPortVal);
  71.         break;
  73.         case 4:
  74.           _outpd(pPort32Struct->wPortAddr, pPort32Struct->dwPortVal);
  75.         break;
  76.       }
  77.       
  78.     break;
  80.     case WINIO_READPORT:
  82.       pPort32Struct = p->dioc_InBuf;
  83.       pdwPortVal = p->dioc_OutBuf;
  85.       switch (pPort32Struct->bSize)
  86.       {
  87.         case 1:
  88.           *pdwPortVal = _inp(pPort32Struct->wPortAddr);
  89.         break;
  91.         case 2:
  92.           *pdwPortVal = _inpw(pPort32Struct->wPortAddr);
  93.         break;
  95.         case 4:
  96.           *pdwPortVal = _inpd(pPort32Struct->wPortAddr);
  97.         break;
  98.       }
  100.     break;
  101.   }
  103.   return 0;
  104. }