Measurement Computing WaveBook rev.3.0 - Manual (Page 224)

D-28 daqX API - Command Reference, 6-24-99 WaveBook User’s Manual
daqSetErrorHandler
DLL Function daqSetErrorHandler(DaqHandleT handle, DaqErrorHandlerFPT handler);
C daqSetErrorHandler(DaqHandleT handle, DaqErrorHandlerFPT handler);
Visual BASIC VBdaqSetErrorHandler&(ByVal handle&, ByVal handler&)
Delphi daqSetErrorHandler(handle:DaqHandleT; handler:DaqErrorHandlerFPT)
handle Handle to the device to which to attach the specified error handler Parameters
handler Pointer to a user defined error handler function.
Returns DerrNoError No error (see the API Error Codes table at the end of this chapter).
See Also daqSetDefaultErrorHandler,daqDefaultErrorHandler,daqGetLastError,daqProcessError
Program References ADCEX1.C, DYN32ENH.C, DAQEX.FRM (VB), ERREX.PAS (Delphi)
Used With All devices
Description
daqSetErrorHandler specifies the routine to call when an error occurs in any command. The default routine displays a message and
then terminates the program. If this is not desirable, use this command to specify your own routine to be called when errors occur. If you
want no action to occur when a command error is detected, use this command with a null (0) parameter. The default error routine is
daqDefaultHandler
.
daqSetOption
DLL Function daqSetOption(DaqHandleT handle, DWORD chan, DWORD flags, DaqOptionType optionType,
FLOAT optionValue);
C daqSetOption(DaqHandleT handle, DWORD chan, DWORD flags, DaqOptionType optionType,
FLOAT optionValue);
Visual BASIC VBdaqSetOption&(ByVal handle&, ByVal chan&, ByVal flags&, ByVal optionType&, ByVal
optionValue!)
Delphi daqSetOption(Handle:DaqHandleT; chan:DWORD; flags:DWORD; optionType:DaqOptionType;
optionValue:FLOAT)
handle The handle to the device for which to set the option
chan The channel number on the device for which the option is to be set
flags Flags specifying the options to use.
optionType Specifies the type of option.
Parameters
optionValue The value of the option to set
Returns DerrNoError No error (see the API Error Codes table at the end of this chapter).
See Also daqAdcExpSetChanOption,
Program References None
Used With All devices
Description
daqSetOption allows the setting of options for a device’s channel/signal path configuration.
The chan parameter specifies to which channel the option applies. The optionType specifies the type of option to apply to the channel.
The optionValue parameter specifies the value of the option. The flags parameter specifies how the option is to be applied. For more
information on the options and their valid settings, refer to the Option Value and Option Type tables.
daqSetTimeout
DLL Function daqSetTimeout(DaqHandleT handle, DWORD mSecTimeout);
C daqSetTimeout(DaqHandleT handle, DWORD mSecTimeout);
Visual BASIC VBdaqSetTimeout&(ByVal handle&, ByVal mSecTimeout&)
Delphi daqSetTimeout(handle:DaqHandleT; mSecTimeout:DWORD)
handle Handle to the device for which the event time-out is to be set Parameters
mSecTimeout Specifies time-out ( ms ) for events
Returns DerrNoError No error (see the API Error Codes table at the end of this chapter).
See Also daqWaitForEvent, daqWaitForEvents
Program References None
Used With All devices
Description
daqSetTimeout
allows you to set the time-out for waiting on a single event or multiple events. This function can be used in conjunction
with the daqWaitForEvent and daqWaitForEvents functions to specify a maximum amount of time to wait for the event(s) to be
satisfied.
The mSecTimeout parameter specifies the maximum amount of time (in milliseconds) to wait for the event(s) to occur. If the event(s) do
not occur within the specified time-out, the daqWaitForEvent and/or daqWaitForEvents will return.