Vtex1629_Set_Pattern_Trig_Configuration - VTI Instruments EX1629 User Manual

48-channel strain gage instrument

Table of Contents

UNCTION

ROTOTYPE

ViStatus vtex1629_set_pattern_trig_configuration (ViSession vi, ViInt16 _VI_FAR lxiTrigLines[], ViInt16

_VI_FAR dioLines[], ViBoolean timer, ViInt32 lxiOutput, ViInt32 lxiInput);

UNCTION

ARAMETERS

vi = contains a session handle to the instrument. This handle is obtained by the function and remains valid until the

session is closed.

lxiTrigLines[] = an integer input array specifying the LXI Trigger Bus channel states that will be accepted as trigger

events. This includes both levels (high and low) and edges (rising and falling). Valid input values: 0 to 255.

dioLines = an integer input array specifying the digital I/O channels that will be accepted as trigger events. This

includes both levels (high and low) and edges (rising and falling). Valid input values: 0 to 255.

timer = a Boolean input value that indicates whether the EX1629 will generate TRIG events based on the internal

timer. Setting this parameter to VI_TRUE(1) will cause TRIG events to be generated. Valid input values:

VI_FALSE(0) or VI_TRUE(1).

lxiOutput = this parameter specifies which LXI Trigger Bus line will be used to output the trigger event signals.

Valid input values: VTEX1629_LXI_LINE_ZERO to VTEX1629_LXI_LINE_SEVEN,

VTEX1629_LXI_LINE_NONE.

lxiInput = this parameter specifies which LXI Trigger Bus line will be used to input the trigger event signals. Valid

input values: VTEX1629_LXI_LINE_ZERO to VTEX1629_LXI_LINE_SEVEN, VTEX1629_LXI_LINE_NONE.

ATA

TEM

ESET

ALUE

lxiTrigLines[] = [0, 0 ,0 ,0]

timer = 0

lxiInput = VTEX1629_LXI_LINE_NONE

ESCRIPTION

This function configures the EX1629's pattern trigger mode of operation. This mode allows the EX1629 to accept

trigger events from multiple sources. While in pattern mode, the instrument can accept trigger events from the LXI

Trigger Bus, digital I/O bus, internal timer, and the software trigger command. There is no need to explicitly enable

the software trigger source – it is always available for use while in pattern trigger mode. All of the conditions

specified must be met for a trigger event to be generated. If multiple conditions are specified for the same LXI or

DIO line, any of the conditions for that line can be met to satisfy the trigger pattern requirements for that line.

The lxiTrigLines[] parameter is an array of four elements with each array element being an unsigned 8-bit integer.

Each bit of this integer corresponds to an LXI Trigger Bus channel. Specifically, the least significant bit corresponds

to LXI Trigger Bus channel zero and the most significant bit corresponds to LXI Trigger Bus channel seven. Each

element specifies which events the EX1629 will accept as trigger events on the LXI Trigger Bus for different edges

or states. If a user wants to specify a channel to for trigger events, the corresponding bit should be set to "1". The

individual array elements specify the following:

0 = lxiTrigLines (Positive Edge)

2 = lxiTrigLines (Positive Level)

For example, if a user wishes to trigger the EX1629 on a negative edge signal coming into the LXI Trigger Bus on

channel 0 and a positive level on channels 3 and 6, then: lxiTrigLines[1] = 00000001b = 0x01 = 1 and

lxiTrigLines[2] = 01001000b = 0x48 = 72.

EX1629 Command Set