Measurement Computing Data Acquisition Systems rev.10.4 - Manual (Page 260)

4.5-30 Daq API Command Reference
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Programmer’s Manual
daqIOReadBit
Also See: daqIORead, daqIOWrite, daqIOWriteBit
Format
daqIOReadBit(handle, devType, devPort, whichDevice, whichExpPort, bitNum,
bitValue)
Purpose
daqIOReadBit reads a specified bit on the selected device and port.
Parameter Summary
Parameter Type Description
handle DaqHandleT Handle to the device from which to perform the IO
devType DaqIODeviceType IO device type
devPort DaqIODevicePort IO device port selection
whichDevice DWORD IO device selection
whichExpPort DaqIOExpansionPort IO expansion port address
bitNum DWORD IO port bit location to read
bitValue PBOOL IO port bit value (true – high, false – low)
Parameter Values
handle: obtained from the daqOpen function
devType: see table below
devPort: see table below
whichDevice: valid values range from 0 to 171
whichExpPort: see table below
bitNum: valid values range from 1 to 16
bitValue: valid values are either true (
≠ 0) or false ( = 0)
Parameter Type Definitions
devType-(DaqIODeviceType)
Definition Description
DiodtLocalBitIO P2 – Local addressing by bit
DiodtLocal8255 P2 – Local addressing on device
DiodtP2Local8 P2 – Local addressing by byte
DiodtP3LocalDig16 P3 – Local addressing for HS 16-bit Dig I/O
DiodtP3LocalCtr16 P3 – Local addressing of 16-bit counters
DiodtP2Exp8 P2 – Expansion addressing by byte
DiodtExp8255 DBK20, DBK21
DiodtDbk23 DBK23
DiodtDbk24 DBK24
DiodtDbk25 DBK25