Measurement Computing Data Acquisition Systems rev.10.4 - Manual (Page 256)

4.5-26 Daq API Command Reference
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Programmer’s Manual
daqIORead
Also See: daqIOReadBit, daqIOWrite,
daqIOWriteBit, daqSetOption
Format
daqIORead(handle, devType, devPort, whichDevice, whichExpPort, value)
Purpose
daqIORead reads the specified port on the selected device.
Parameter Summary
Parameter Type Description
handle DaqHandleT Handle to the device to perform the IO read
devType DaqIODeviceType IO device type
devPort DaqIODevicePort IO device port selection
whichDevice DWORD IO device instance to read from
whichExpPort DaqIOExpansionPort IO device expansion port to read from
value PDWORD Pointer to returned IO read value
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
value: pointer to a value ranging from 0 to 65,535
Parameter Type Definitions
devType–(DaqIODeviceType)
Definition Description
DiodtLocalBitIO P2 – Local addressing by bit
DiodtLocal8255 P2 – Local addressing on the 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