rs485nt.h

RS485设备驱动源代码

//---------------------------------------------------------------------------
//
// RS485NT.H
//
// Author:  Anthony A. Kempka
//          Device Drivers International, LLC
//
//          Tel: [phone]
//          Tel: [phone]
//          Web: www.ddiusa.com
//
// 
// For:     Integrity Instruments (a division of Cogito Software, Inc.)
//
//          Tel: [phone]
//          Web: www.integrityusa.com
//
//
// Last Modified:       
//      A. A. Kempka    08/20/97        Original.
//  
//---------------------------------------------------------------------------

//
// Defaults
//

#define DEF_PORT_ADDRESS    0x2F8
#define DEF_PORT_RANGE      0x07
#define DEF_IRQ_LINE        0x03
#define DEF_BAUD_RATE       19200
#define DEF_BUFFER_SIZE     2048

//---------------------------------------------------------------------------
//
// *Note*
// ALL variables and data storage should be placed in 
// the following data structure.
//

typedef struct _RS485NT_DEVICE_EXTENSION {
    PDEVICE_OBJECT  DeviceObject;
    PKINTERRUPT	    InterruptObject;
    KIRQL           Irql;
    ULONG           InterruptCount;
    ULONG           RcvError;
    LARGE_INTEGER   LastQuerySystemTime;
    ULONG           ioCtlCode;
    PUCHAR          PortAddress;
    KIRQL           IRQLine;
    ULONG           BaudRate;
    COMPORT         ComPort;
    KEVENT          XmitDone;
    ULONG           BufferSize;
    PUCHAR          XmitBuffer;
    PUCHAR          XmitBufferPosition;
    PUCHAR          XmitBufferEnd;
    ULONG           XmitBufferCount;
    PUCHAR          RcvBuffer;
    PUCHAR          RcvBufferPosition;
    PUCHAR          RcvBufferEnd;
    ULONG           RcvBufferCount;
} RS485NT_DEVICE_EXTENSION, *PRS485NT_DEVICE_EXTENSION;