rs485ioc.h

RS485设备驱动源代码

//---------------------------------------------------------------------------
//
// RS485IOC.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.
//  
//---------------------------------------------------------------------------


//---------------------------------------------------------------------------
//
// Define the various device type values.  Note that values used by Microsoft
// Corporation are in the range 0-32767, and 32768-65535 are reserved for use
// by customers.
//

#define FILE_DEVICE_RS485DRV  0x00009000

//
// Macro definition for defining IOCTL and FSCTL function control codes.  Note
// that function codes 0-2047 are reserved for Microsoft Corporation, and
// 2048-4095 are reserved for customers.
//

#define RS485DRV_IOCTL_INDEX  0x900

//
// The SAMPLE device driver IOCTLs
//

#define IOCTL_RS485NT_HELLO CTL_CODE(FILE_DEVICE_RS485DRV, RS485DRV_IOCTL_INDEX, METHOD_BUFFERED, FILE_ANY_ACCESS)
#define IOCTL_RS485NT_GET_RCV_COUNT CTL_CODE(FILE_DEVICE_RS485DRV, RS485DRV_IOCTL_INDEX+1, METHOD_BUFFERED, FILE_ANY_ACCESS)
#define IOCTL_RS485NT_LAST_RCVD_TIME CTL_CODE(FILE_DEVICE_RS485DRV, RS485DRV_IOCTL_INDEX+2, METHOD_BUFFERED, FILE_ANY_ACCESS)