imgSessionTriggerDrive2

NI IMAQ Function

imgSessionTriggerDrive2

Usage

rval imgSessionTriggerDrive2(SESSION_ID sid, IMG_SIGNAL_TYPE triggerType, uInt32 triggerNumber, uInt32 polarity, uInt32 source);

Purpose

Configures the specified trigger line to drive a signal out.

Parameters

Name Type Direction
sid SESSION_ID input
triggerType IMG_SIGNAL_TYPE input
triggerNumber uInt32 input
polarity uInt32 input
source uInt32 input
rval Int32 output

Parameter Discussion

sid: valid SESSION_ID.

triggerType: type of trigger line to use. triggerType can be one of the following constants:

Note Note  To use the ISO_IN or RS422_IN signals on the NI PCI-1426, select External as the Trigger Type for your function and choose ISO In or RS-422 In as the Signal Level for the trigger line in Measurement & Automation Explorer (MAX).
IMG_SIGNAL_EXTERNAL
IMG_SIGNAL_RTSI
IMG_SIGNAL_ISO_OUT

triggerNumber: number of the trigger line to use.

polarity: polarity of the trigger line. polarity can be one of the following constants:

IMG_TRIG_POLAR_ACTIVELDrives the line low when the signal is true.
IMG_TRIG_POLAR_ACTIVEHDrives the line high when the signal is true.

source: specifies the signal that drives the trigger line as specified by the following constants:

IMG_TRIG_DRIVE_DISABLED
IMG_TRIG_DRIVE_AQ_IN_PROGRESS
IMG_TRIG_DRIVE_AQ_DONE
IMG_TRIG_DRIVE_ASSERTED
IMG_TRIG_DRIVE_UNASSERTED
IMG_TRIG_DRIVE_HSYNC
IMG_TRIG_DRIVE_VSYNC
IMG_TRIG_DRIVE_FRAME_START
IMG_TRIG_DRIVE_FRAME_DONE
IMG_TRIG_DRIVE_SCALED_ENCODER

Return Value

This function returns 0 on success. On failure, this function returns an error code. For information about the error code, call imgShowError.