4.2.17 - eAIN()

An easy function that returns a reading from one analog input. This is a simple alternative to the very flexible IOType based method normally used by this driver.

When needed, this function automatically configures the specified channel(s) for analog input.

Declaration:

LJ_ERROR _stdcall eAIN (  LJ_HANDLE Handle,
                          long ChannelP,
                          long ChannelN,
                          double *Voltage,
                          long Range,
                          long Resolution,
                          long Settling,
                          long Binary,
                          long Reserved1,
                          long Reserved2)

Parameter Description:
Returns: LabJack errorcodes or 0 for no error.
Inputs:

• Handle – Handle returned by OpenLabJack().
• ChannelP – The positive AIN channel to acquire.
• ChannelN – The negative AIN channel to acquire. For the UE9, this parameter is ignored. For single-ended channels on the U3, this parameter should be 31 (see Section 2.7.1).
• Range – Pass a range constant. See Section 4.3.3.
• Resolution – Pass 12-17 to specify the resolution of the analog input reading, and 18 for a high-res reading from the UE9-Pro. 0-11 corresponds to 12-bit.
• Settling – Pass 0 for the default settling. This parameter adds extra settling before the ADC conversion of about Settling times 5 microseconds.
• Binary – If this is nonzero (True), the Voltage parameter will return the raw binary value.
• Reserved (1&2) – Pass 0.

Outputs:

• Voltage – Returns the analog input reading, which is generally a voltage.