Graphics generation device comprising means for monitoring its operation
AssigneeThales
InventorsPatrice Capircio, Eric Filliatre
Life of this patent
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Abstract
A device for the graphical generation of symbologies intended for a display screen, the device having functions for the generation of symbology elements and means for monitoring its correct operation. The monitoring of correct operation allowing the use of certain of the functions for the generation of symbology elements to be prohibited and micro-images dedicated to the monitoring of the functions to be generated and controlled.
Claims13
A graphics generation device for graphical generation of symbologies intended for a display screen, the said graphics generation device comprising:
- functions for generation of symbology elements;
- and
- a means for monitoring correct operation of the graphics generation device, comprising:
- a first means allowing use of a portion of the said functions for the generation of the symbology elements to be prohibited;
- and
- a second monitoring means allowing micro-images dedicated to monitoring of the said functions to be generated and controlled.
A method for monitoring correct operation of a graphics generation device, comprising the following steps:
- tracing of a micro-image within a first region of a memory, the first region for storage of symbology elements, the micro-image based on a function for generation of a symbology element;
- calculating a mathematical signature for the micro-image;
- comparing the calculated mathematical signature with an expected signature;
- erasing the micro-image form the first region;
- and
- tracing of an operational image based on the micro-image into a second region of the memory, the operational image in the second region being displayed.
Dependencies are inferred from the claim text.