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.
resetCounter – If >0, the counter is reset to zero after being read.
enableSTB – If >0, STB is enabled. Used for testing and calibration. (This input has no effect with firmware V1.02 or earlier,
in which case STB is always enabled)
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 CounterX ( long FAR* idnum,
long demo,
long FAR* stateD,
long FAR* stateIO,
long resetCounter,
long enableSTB,
double FAR* count )
4.17 - DigitalIO
Reads and writes to all 20 digital I/O. The order of execution within the U12 is:
1. Set D states
2. Set D directions
3. Set IO states
4. Set IO directions
5. Read D states
6. Read IO states
Even more detail of the execution order with the approximate time between each step:
1. Set D7-D0 states
2. 1 µs
3. Set D12-D8 states
4. 2 µs
5. Set D15-D13 states
6. 0.5 µs
7. Set D7-D0 directions
8. 1 µs
9. Set D12-D8 directions
10. 1 µs
11. Set D15-D13 directions
12. 16 µs
13. Set IO states
14. 16 µs
15. Set IO directions
16. 2 µs
17. Read D7-D0 states
18. 0.3 µs
19. Read D12-D8 states
20. 0.7 µs
21. Read D15-D13 states
22. 10 µs
23. Read IO states
Execution time for this function is 20 milliseconds or less (typically 16 milliseconds in Windows).
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