Measurement Computing Data Acquisition Systems rev.10.4 - Manual (Page 265)

devPort–(DaqIODevicePort)
Definition Description
Local Bit I/O
DiodpBitIO P2 – Addressing by bit
P2 Sequential 8-Bit Addressing
DiodpP2Local8 P2 – Local addressing by byte
DiodpP2LocalIR P2 – Local Internal register (for configuring P2)
DiodpP2Exp8 P2 – Expansion adressing by byte
P3 Digital Port
DiodpP3LocalDig16
P3 – Local addressing for HS 16-bit Dig I/O
DiodpP3LocalDigIR P3 – Local Internal register (for configuring P3)
Local 8255, Dbk20, Dbk21 (Daq device and DBK only)
Diodp8255A P2 – Digital byte wide Port A
Diodp8255B P2 – Digital byte wide Port B
Diodp8255C P2 – Digital byte wide Port C
Diodp8255IR P2 –Internal register (for configuring P2)
Diodp8255CHigh P2 – Digital 4-bit wide Port C
Diodp8255CLow P2 – Digital 4-bit wide Port C
DiodpP3LocalCtr16 P3 – 16-bit Counter
Dbk23
DiodpDbk23A
DBK23 – Digital byte wide Port A
DiodpDbk23B DBK23 – Digital byte wide Port B
DiodpDbk23C DBK23 – Digital byte wide Port C
DiodpDbk23Unused Not used
Dbk24
DiodpDbk24A
DBK24 – Digital byte wide Port A
DiodpDbk24B DBK24 – Digital byte wide Port B
DiodpDbk24C DBK24 – Digital byte wide Port C
DiodpDbk24Unused Not used
DiodpDbk25 DBK25
Wbk17
DiodpWbk17_8Bit WBK17 – 8-bit digital output
whichExpPort–(DaqIOExpansionPort)
Definition Description
DioepP1 Note that DioepP1 is only for DigiBook and WaveBook applications.
DioepP2 DBK20/21 Port 2
DioepP3 DBK20/21 Port 3
Returns
DaqError See Daq Error Table
For more details on error messages refer to the Daq Error Table.
Function Usage
The daqIOWrite function will output to the port the bit battern represented by the value parameter. Normally,
if the selected port is a byte-wide port, the port state will occupy the low-order byte of the value parameter.
Digital I/O channels for the port corresponds to each bit within this low-order byte. If the bit is set, it indicates the
channel is in a high state. If the bit is not set, the channel is indicated to be in a low state. This function requires that
daqIOGet8255Conf
or daqSetOption be called prior to invocation to configure the specifed port as an output
port.
Programmer’s Manual
908794
Daq API Command Reference 4.5-35