Gx3722DigitizerGetTriggerSource

Purpose

Returns the trigger channel source.

Syntax

Gx3722DigitizerGetTriggerSource (nHandle, pnSource, pnStatus)

Parameters

Name
Type
Comments
nHandle
SHORT
Handle to a GX3722 board.
pnSource
PSHORT
Trigger channel source is as follows:
0.      GX3722_DIGITIZER_TRIGGER_SOURCE_CH1: when trigger condition is met on input channel 1, it will start acquiring data on the channel that was enable previously.
1.    GX3722_DIGITIZER_TRIGGER_SOURCE_CH2 when trigger condition is met on input channel 2, it will start acquiring data on the channel that was enable previously.
pnStatus
PSHORT
Returned status: 0 on success, negative number on failure.

Comments

The function returns the digitizer trigger channel source.

The digitizer will start acquiring data whenever the trigger condition is met as it was set using the Gx3722DigitizerSetTriggerMode() API, and the rigger mode was not set to software. Data will be recorded into the enables channels as it was set by calling the Gx3722DigitizerSetState() API.

Note: the trigger source can be set to either channel regardless to which channel is actually enabled. E.g. setting trigger source and trigger mode to channel 2 and enabling acquisition on channel 1.

Example

The following example sets the digitizer’s trigger mode, source and ennobles channel 1:

 

SHORT nHandle, nStatus;

SHORT nMode;

 

Gx3722DigitizerSetState(nHandle, GX3722_DIGITIZER_CH1, GX3722_DIGITIZER_CH_STATE_ENABLE, &nStatus);

Gx3722DigitizersetTriggerMode(nHandle, GX3722_DIGITIZER_TRIGGER_RISING_EDGE, &nStatus);

Gx3722DigitizerSetTriggerSource(nHandle, GX3722_DIGITIZER_TRIGGER_SOURCE_CH1, &nStatus);

 

See Also

Gx3722DigitizerArm, Gx3722DigitizerHalt, Gx3722DigitizerSetTriggerSource, Gx3722DigitizerSetTriggerMode, Gx3722DigitizerSetTriggerThreshold, Gx3722DigitizerSetSampleCount, Gx3722DigitizerTrigger, Gx3722DigitizerReadWaveform, Gx3722DigitizerReadWaveformEx, Gx3722DigitizerSetPxiTrigger, Gx3722DigitizerGetState, Gx3722DigitizerGetSampleStatus, GxFpgaGetErrorString