Raspberry Pi model 3 hdmi output


2 posts
by Makogan » Sat May 27, 2017 10:56 pm
As the name suggests, I want some reference material as to how to get some hdmi output for the pi. If I can get a white pixel I'll be overjoyed. Thank you in advance.
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by LdB » Mon May 29, 2017 2:32 am
There are no white papers or even much documentation for the Pi HDMI you have to piece together information and look at existing code and websites.

The basics are:
You use the mailbox API to setup the Video mode you want and get a framebuffer, that much is documented
https://github.com/raspberrypi/firmware ... -interface

The framebuffer is the flat video memory pointer the bits/byte array from that pointer have different layout depending on video mode you select.

That is where most of us started.

There are a number of good assembler sources:
David Welch: https://github.com/dwelch67/raspberrypi
Peter Lemon: https://github.com/PeterLemon/RaspberryPi

If you prefer C my the source code for my article may help:
https://www.codeproject.com/Articles/11 ... he-Pi-part
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