94 lines
3.5 KiB
Text
94 lines
3.5 KiB
Text
README file for Artix 7 HDMI processing
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=======================================
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Hi!
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This is my design for receiving HDMI input, then extracting the video data, the
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Video Inforframe and audio samples, then using that to display audio db meters
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on the top corner of the screen. Currently for simplicity the output is only DVID.
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Features
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--------
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Supports HDMI formats:
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-720p@50
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- 720p@60,
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- 1080i (with a bug)
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- 1080p@50
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- 1080p@60
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and others....
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Colourspaces / formats:
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- RGB 444
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- YCbCr 444
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- YCbCr 422
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New feature 10-AUG-2015!
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-----------------------
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Switch 0 will turn real-time edge detect off and on.
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New feature 6-AUG-2015!
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-----------------------
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Switch 1 will turn guidelines off and on. Will only show in 1080p 1080i and 720p resolutions.
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Supported Boards
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----------------
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- Digilent Nexys Video
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Sources tested with:
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- Western Digital HD Live
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- HP Laptop
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Sinks tested with:
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- Viewsonic Monitor
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- AOC Monitor
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- Vivo TV
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Known issues:
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- Currently extracts only two channels of audio
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- Does not adjust PLL settings for input clock, so the PLL is run slightly out
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of spec.
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- Image may re-sync once after a few seconds if symbol errors are seen.
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- There are timings errors, as generating 148.5MHz HDMI using the Artix-7 chip
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is actually out of spec. Expect seven failing paths and about 20ns of negative
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slack.
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------------------------------------------------------------------------------------
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-- The MIT License (MIT)
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--
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-- Copyright (c) 2015 Michael Alan Field
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--
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-- Permission is hereby granted, free of charge, to any person obtaining a copy
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-- of this software and associated documentation files (the "Software"), to deal
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-- in the Software without restriction, including without limitation the rights
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-- to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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-- copies of the Software, and to permit persons to whom the Software is
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-- furnished to do so, subject to the following conditions:
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--
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-- The above copyright notice and this permission notice shall be included in
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-- all copies or substantial portions of the Software.
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--
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-- THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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-- IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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-- FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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-- AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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-- LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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-- OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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-- THE SOFTWARE.
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------------------------------------------------------------------------------------
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----- Want to say thanks? ----------------------------------------------------------
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------------------------------------------------------------------------------------
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--
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-- This design has taken many hours - with the industry metric of 30 lines
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-- per day, it is equivalent to about 6 months of work. I'm more than happy
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-- to share it if you can make use of it. It is released under the MIT license,
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-- so you are not under any onus to say thanks, but....
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--
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-- If you what to say thanks for this design how about trying PayPal?
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-- Educational use - Enough for a beer
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-- Hobbyist use - Enough for a pizza
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-- Research use - Enough to take the family out to dinner
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-- Commercial use - A weeks pay for an engineer (I wish!)
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--
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----------------------------------------------------------------------------------
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