MATLAB IMAGE ACQUISITION TOOLBOX - RELEASE NOTES Podręcznik Użytkownika Pobierz pdf (Strona 105)

Supporting Hardware Triggers

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Supporting Hardware Triggers

The toolbox supports three types of triggers:

• Immediate — Trigger fires when video input object is started.

• Manual — Trigger fires when user calls trigger function.

• Hardware — Trigger fires when externally defined conditions are met

The engine provides automatic support for immediate and manual triggers. If you

want your adaptor to support hardware triggers you must check to see if users have

specified a hardware trigger in your acquisition thread function. Before you start

acquiring frames from your device, insert a call to the IAdaptor member function

useHardwareTrigger() to determine if the frame acquisition loop should wait for a

hardware trigger to fire. If a hardware trigger is configured, insert device SDK calls

required to wait for trigger.

The following figure illustrates the frame acquisition loop with the test for hardware

trigger.

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MATLAB IMAGE ACQUISITION TOOLBOX - RELEASE NOTES Podręcznik Użytkownika Strona 105