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RetrievingtheSerialInterfaceType(RS-232or

RS-485)

Therearetwowaystoretrievetheserialinterfacetype(RS-232orRS-

485):

ReadtheNI-VISAwiremodeattribute.

TheNI-Serialsoftwareusesprogrammaticcontrolcodesandthe

DeviceIoControlWindowsfunctiontoretrievetheserialinterface

type.

ToretrievetheserialinterfacetypeusingtheDeviceIoControlWindows

function,completethefollowingsteps:

1. Addthefollowinglinestoyoursourcecode:

#include<winioctl.h>

#include<NiSerial.h>

NoteTheheaderfileNiSerial.hisincludedonyourNI-

SerialsoftwareCD.YoualsocanfinditintheNI-Serial

folderwhereyouinstalledyourNationalInstruments

software(typically,C:\ProgramFiles\NationalInstruments\NI-

Serial).

2. TheSERIAL_INTERFACEattributecanhavethefollowingvalues:

RS485_INTERFACE

RS232_INTERFACE

3. Toretrievetheserialinterfacetype,use

NISERIAL_GET_INTERFACE_TYPEandDeviceIoControlwiththe

followingcode:

SERIAL_INTERFACEl_SerialInterface;

DWORDl_ByteCount;

DeviceIoControl(

PortHandle,

NISERIAL_GET_INTERFACE_TYPE,

(LPVOID)NULL,

National Instruments PCI-8430 User Manual

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