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.
PL subsystemEdit
PS subsystemEdit
(for more details see also this white paper)
[1] At the time of this writing not all of the shown modules have been completed.