adcard_e.h

一个AD数据采集卡的例子源代码

// ADCARD_E.h - include file for VxD ADCARD_E 
#include <vtoolscp.h>
#include "all.h"
#define DEVICE_CLASS            Adcard_eDevice 
#define ADCARD_E_DeviceID       UNDEFINED_DEVICE_ID 
#define ADCARD_E_Init_Order     UNDEFINED_INIT_ORDER 
#define ADCARD_E_Major          1 
#define ADCARD_E_Minor          0 
#define MY_IRQ            7 
//------------------------ 
class AdVMEvent:public VVMEvent//创建事件派生类 
{ 
public: 
        AdVMEvent(VMHANDLE hVM):VVMEvent(hVM,0){}; 
        virtual VOID handler(VMHANDLE hVM,CLIENT_STRUCT* pRegs,PVOID refData); 
}; 
//--------------------定义时钟类 
class AdTimeOut:public VGlobalTimeOut 
{ 
public: 
        AdTimeOut(DWORD msec); 
        VOID handler(VMHANDLE hVM, THREADHANDLE th, PCLIENT_STRUCT pRegs,DWORD llag) 
; 
}; 
//-------------------- 
class AdHwInt:public VHardwareInt 
{ 
public: 
        virtual VOID OnHardwareInt(VMHANDLE); 
        AdHwInt():VHardwareInt(MY_IRQ,0,0,0){}; 
    AdVMEvent *pEvent; 
}; 
//---------------------- 
class Adcard_eDevice : public VDevice 
{ 
public: 
        virtual BOOL OnSysDynamicDeviceInit(); 
        virtual BOOL OnSysDynamicDeviceExit(); 
        virtual DWORD OnW32DeviceIoControl(PIOCTLPARAMS pDIOCParams); 
        AdHwInt *pMyIRQ; 
        AdTimeOut *pMyTimer; 
        WORD channel; 
        WORD frequency;//单位为hz 
}; 
//------------------------vxd私有锁定内存类 
class BuffClass : public VLockedPageObject      // this class has a large data size 
{ 
public: 
        BuffClass(); 
        int read_i(char* buf, int count); 

        int write_i(char* buf, int count); 
        int read_o(char* buf, int count); 
        int write_o(char* buf, int count); 
        //read返回值为0表示操作成功，为1表示操作失败 
        //write返回值为0为成功，1为成功且缓冲已满，2为失败 
        //可分次写入，但只能一次读完整个缓冲 
protected: 
        BYTE inputBuffer[BUFFER];//接收缓冲 
        BYTE outputBuffer[BUFFER];//发送缓冲 
        int ptr_i;//已填充的字节数 
        int ptr_o;//已填充的字节数 
};