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ManualsBrandsPICO ManualsEnvironmental Testing EquipmentLog® 1012 0 - 2.5 Vdc USB Multi-channel voltage data logger

PicoLog 1000 Series Programmer's Guide 21

3.3.15

pl1000SetTrigger

PICO_STATUS pl1000SetTrigger(

short handle,

unsigned short enabled,

unsigned short auto_trigger,

unsigned short auto_ms,

unsigned short channel,

unsigned short dir,

unsigned short threshold,

unsigned short hysteresis,

float delay

)

This function sets up the trigger, which controls when the unit starts capturing data.

Arguments:

handle: handle returned from pl1000OpenUnit or

pl1000OpenUnitProgress

enabled: whether to enable or disable the trigger:

0: disable the trigger

1: enable the trigger

auto_trigger: whether or not to re-arm the trigger automatically

after each trigger event:

0: do not auto-trigger

1: auto-trigger

auto_ms: time in milliseconds after which the unit will auto-trigger if

the trigger condition is not met

channel: which channel to trigger on, from PL1000_CHANNEL_1 to

This functionsPL1000_CHANNEL_12 (for the PicoLog 1012) or

PL1000_CHANNEL_16 (for the PicoLog 1216).

dir: which edge to trigger on:

0: rising edge

1: falling edge

threshold: trigger threshold (the level at which the trigger will

activate) in ADC counts

hysteresis: trigger hysteresis in ADC counts. This is the difference

between the upper and lower thresholds. The signal must then pass

through both thresholds in the same direction in order to activate the

trigger, so that there are fewer unwanted trigger events caused by

noise. The minimum value allowed is 1.

delay: delay between the trigger event and the start of the block as

a percentage of the block size. 0% means that the trigger event is

the first data value in the block, and -50% means that the trigger

event is in the middle of the block.

Returns:

PICO_OK

PICO_INVALID_HANDLE

PICO_USER_CALLBACK

PICO_TRIGGER_ERROR

PICO_MEMORY_FAIL