>>> d = u12.U12()
open called
Writing: [0x0, 0x0, 0x0, 0x0, 0x0, 0x57, 0x0, 0x0]
Received: [0x57, 0x0, 0x0, 0x0, 0xff, 0xff, 0x0, 0x0]
>>> d.eDigitalOut(0, 1)
Writing: [0x0, 0x0, 0x0, 0x0, 0x0, 0x57, 0x0, 0x0]
Received: [0x57, 0x0, 0x0, 0x50, 0x0, 0x0, 0x0, 0x0]
Writing: [0x0, 0x0, 0x0, 0x0, 0x1, 0x57, 0x1, 0x0]
Received: [0x57, 0x0, 0x0, 0x10, 0x0, 0x0, 0x0, 0x0]
{'idnum': 12}
4.6 - AISample
Reads the voltages from 1,2, or 4 analog inputs. Also controls/reads the 4 IO ports.
Execution time for this function is 20 milliseconds or less (typically 16 milliseconds in Windows).
Declaration:
long AISample ( long *idnum,
long demo,
long *stateIO,
long updateIO,
long ledOn,
long numChannels,
long *channels,
long *gains,
long disableCal,
long *overVoltage,
float *voltages )
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.
*stateIO – Output states for IO0-IO3. Has no effect if IO are configured as inputs, so a different function must be used to
configure as output.
updateIO – If >0, state values will be written. Otherwise, just a read is performed.
ledOn – If >0, the LabJack LED is turned on.
numChannels – Number of analog input channels to read (1,2, or 4).
*channels – Pointer to an array of channel commands with at least numChannels elements. Each channel command is 0-7
for single-ended, or 8-11 for differential.
*gains – Pointer to an array of gain commands with at least numChannels elements. Gain commands are 0=1, 1=2, …,
7=20. This amplification is only available for differential channels.
disableCal – If >0, voltages returned will be raw readings that are not corrected using calibration constants.
*voltages – Pointer to an array where voltage readings are returned. Send a 4-element array of zeros.
Outputs:
*idnum – Returns the local ID or –1 if no LabJack is found.
*stateIO – Returns input states of IO0-IO3.
*overVoltage – If >0, an overvoltage has been detected on one of the selected analog inputs.
*voltages – Pointer to an array where numChannels voltage readings are returned.
ActiveX Function Differences:
The “channels” and “gains” arrays are replaced with “channelsPacked” and “gainsPacked”. The OCX has a function “FourPack”
which will convert 4 elements to a packed value. The packed value is determined as: element[0] + (element[1] * 2
8
) + (element[2] *
2
16
) + (element[3] * 2
24
).
The “voltages” array is replaced with 4 individual parameters.
Declaration (ActiveX):
long AISampleX ( long FAR* idnum,
long demo,
long FAR* stateIO,
long updateIO,
long ledOn,
long numChannels,
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