50 • X64 Xcelera-CL PX4 Reference X64 Xcelera-CL PX4 User's Manual
Acquisition Methods
Sapera acquisition methods define the control and timing of the camera and frame grabber board. Various
methods are available, grouped as:
• Camera Trigger Methods (method 1 and 2 supported)
• Camera Reset Methods (method 1 supported)
• Line Integration Methods (method 1 through 4 supported)
• Time Integration Methods (method 1 through 8 supported)
• Strobe Methods (method 1 through 4 supported)
Refer to the Sapera LT Acquisition Parameters Reference manual (OC-SAPM-APR00) for detailed
information concerning camera and acquisition control methods.
Supported Events
The following acquisition and transfer events are supported. Event monitoring is a major component to
the Trigger-to-Image Reliability framework.
Acquisition Events
Acquisition events are related to the acquisition module. They provide feedback on the image capture
phase.
• External Trigger (Used/Ignored)
Generated when the external trigger pin is asserted, usually indicating the start of the acquisition
process. There are 2 types of external trigger events: ‘Used’ or ‘Ignored’. Following an external
trigger, if the event generates a captured image, an External Trigger Used event will be
generated (CORACQ_VAL_EVENT_TYPE_EXTERNAL_TRIGGER).
If there is no captured image, an External Trigger Ignored event will be generated
(CORACQ_VAL_EVENT_TYPE_EXTERNAL_TRIGGER_IGNORED). An external trigger
event will be ignored if the rate at which the events are received are higher than the possible
frame rate of the camera.
• Start of Frame
Event generated, during acquisition, when the connected sensor video frame start is detected by
the board acquisition hardware. The Sapera event value is
CORACQ_VAL_EVENT_TYPE_START_OF_FRAME.
• End of Frame
Event generated, during acquisition, when the connected sensor video frame end is detected by
the board acquisition hardware. The Sapera event value is
CORACQ_VAL_EVENT_TYPE_END_OF_FRAME.
• Data Overflow
The Data Overflow event indicates that there is not enough bandwidth for the acquired data to be
transferred without loss. This is usually caused by limitations of the acquisition module and
should never occur.
The Sapera event value is CORACQ_VAL_EVENT_TYPE_DATA_OVERFLOW.
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