BELK-TN-003: Video processing and hardware/software partitioning
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Contents
HistoryEdit
| Version | Date | Notes |
|---|---|---|
| 1.0.0 | June 2016 | First public release |
IntroductionEdit
This white paper describes a video processing system that has been built upon Bora/BoraEVB. This system has functional and safety requirements that have to be satisfied.
From the functional point of view, it is required to (FR denotes a functional requirement):
- FR1 acquire two independent video streams
- FR2 mix the input stream and visualize them on a HDMI monitor
- FR3 visualize informational and statistical data on an 7" LVDS TFT LCD.
Safety requirements (SR for short) are:
- SR1FR1 and FR2 have to be enabled as quickly as possible upon power-up
- SR1apart from initialization, FR1 and FR2 have to be independent on the execution of the software; in other words, they keep to be satisfied even if software hangs.
The implementation combines different techniques that are available on Zynq platform to implement a hardware/software partitioning that allows to meet system requirements.
ImplementationEdit
The following picture shows a simplified block diagram of the entire system [1].
At hardware level, the natural PS/PL partitioning has been exploited: the processing video chain is entirely implemented in the PL, while PS domain is used for initializing, supervisioning and informational data visualization.
[1] At the time of this writing not all of the shown modules have been completed.
PL subsystemEdit
PS subsystemEdit
(for more details see also this white paper)