kerjoe/ortd2662

RTD2662 Custom firmware

ortd2662's Issues

Somewhat related question

Hello,
let me start by saying that my question is only tangentially related to your project, so I'll understand if it's deemed inappropriate here.

In short, I bought a PCB800099 V.9 LCD controller on AliExpress, but it turns out the firmware that comes with it doesn't readily support the screen I'd like to drive. The screen's resolution is 1600x1200 and it has 2 channel, 6-bit color LVDS interface (30 pin). The PCB800099 version that I got has configuration jumpers, with options that can be seen e.g. here. Unfortunately, 1600x1200 is not listed. The closest resolution is 1600x900(jumpers A+6+2 as listed in the table). As expected it sort of works, but of course the image is compressed into the top 3/4 of the screen.

I also tried this alternative firmware. There are probably subtle differences between the boards because while the vsync is now correct, the colors are wrong. There is some sort noise/glitching too, so something is definitely off. You can see how it looks here.

As far as I can say from your public repos you seem to have long standing interest in RTD2662, so I decided to ask for your advice. Do you know if there is an easy fix for this issue. Or if I decide to take the long(er) road do you know if there exists any tutorial on how to set toolchains for compilation. I read about some proprietary Windows-only compiler that can be used to compile leaked firmwares, but I'm not sure what firmware and which version of the tools(assuming they are even freely available) can be used. And then I wouldn't know where exactly the modifications should be applied.

From your Makefile, you are apparently using 'sdcc' which I see is available in Ubuntu's repos already. What do you think would be the path of least resistance to solve my issue? Do you think your free firmware can serve my purposes? I'd like to have access to at least basic controls like color temperature, contrast and brightness, even if that means recompilation/re-upload.

Also do you know of any forums where people interested in hacking these chips/boards gather?

Thank you!