Measurement Computing WaveBook rev.3.0 - Manual (Page 222)

D-26 daqX API - Command Reference, 6-24-99 WaveBook User’s Manual
daqIOWriteBit
DLL Function daqIOWriteBit(DaqHandleT handle, DaqIODeviceType devType, DaqIODevicePort devPort,
DWORD whichDevice, DaqIOExpansionPort whichExpPort, DWORD bitNum, BOOL bitValue);
C daqIOWriteBit(DaqHandleT handle, DaqIODeviceType devType, DaqIODevicePort devPort,
DWORD whichDevice, DaqIOExpansionPort whichExpPort, DWORD bitNum, BOOL bitValue);
Visual BASIC VBdaqIOWriteBit&(ByVal handle&, ByVal devType&, ByVal devPort&, ByVal whichDevice&,
ByVal whichExpPort&, ByVal bitNum&, ByVal bitValue&)
Delphi daqIOWriteBit(handle:DaqHandleT; devType:DaqIODeviceType; dvPort:DaqIODevicePort;
whichDevice:DWORD; whichExpPort:DaqIOExpansionPort; bitNum:DWORD;
bitValue:longbool)
handle Handle of the device to perform an I/O write to
devType I/O device type
devPort I/O device port selection
whichDevice I/O device selection
whichExpPort I/O device expansion port address
bitNum Bit number to write
Parameters
bitValue Bit value to write (TRUE - high, FALSE - low)
Returns DerrNoError No error (see the API Error Codes table at the end of this chapter).
See Also daqIOWrite, daqIORead, daqIOReadBit
Program References None
Used With All devices
Description
daqIOWriteBit allows you to write a specified bit on the selected device and port. The write operation will write the specified bit value to
the bit selected. The selected bit, specified by the bitNum parameter, corresponds to the channel on the port for the I/O to be driven.
The bitValue parameter should be set to TRUE to drive the channel to a high state or FALSE indicating a low state.
daqOnline
DLL Function daqOnline(DaqHandleT handle, PBOOL online);
C daqOnline(DaqHandleT handle, PBOOL online);
Visual BASIC VBdaqOnline&(ByVal handle&, online&)
Delphi daqOnline(handle: DaqHandleT; var online: longbool)
handle Handle of the device to test for online Parameters
online Boolean indicating whether the device is currently online
Returns DerrNoError No error (see the API Error Codes table at the end of this chapter).
See Also daqOpen, daqClose
Program References ERREX.PAS (Delphi)
Used With All devices
Description
daqOnline allows you to determine if a device is online. The device handle must be a valid device handle which has been opened
using the daqOpen function. The online parameter indicates the current online state of the device (TRUE - device online; FALSE -
device not online).