User Manual

Declaration:
long AIStreamClear ( long localID )
Parameter Description:
Returns: LabJack errorcodes or 0 for no error.
Input:
• localID – Send the local ID from AIStreamStart/Read.
4.11 AOUpdate
Sets the voltages of the analog outputs. Also controls/reads all 20 digital I/O and the counter.
Execution time for this function is 20 milliseconds or less.
Declaration:
long AOUpdate ( long *idnum,
long demo,
long trisD,
long trisIO,
long *stateD,
long *stateIO,
long updateDigital,
long resetCounter,
unsigned long *count,
float analogOut0,
float analogOut1)
Parameter Description:
Returns: LabJack errorcodes or 0 for no error.
Inputs:
• *idnum – Local ID, serial number, or -1 for first found.
• demo – Send 0 for normal operation, >0 for demo mode. Demo mode allows
this function to be called without a LabJack.
• trisD – Directions for D0-D15. 0=Input, 1=Output.
• trisIO – Directions for IO0-IO3. 0=Input, 1=Output.
• *stateD – Output states for D0-D15.
• *stateIO – Output states for IO0-IO3.
• updateDigital – If >0, tris and state values will be written. Otherwise, just a read
is performed.
• resetCounter – If >0, the counter is reset to zero after being read.
• analogOut0 – Voltage from 0.0 to 5.0 for AO0.
• analogOut1 – Voltage from 0.0 to 5.0 for AO1.
Outputs:
• *idnum – Returns the local ID or –1 if no LabJack is found.
• *stateD – States of D0-D15.
• *stateIO – States of IO0-IO3.
• *count – Current value of the 32-bit counter (CNT). This value is read before the
counter is reset.
ActiveX Function Differences:
The counter read is returned as a double precision float, instead of an unsigned long.
Declaration (ActiveX):
long AOUpdateX ( long FAR* idnum,