[MK4] HOWTO: Take a screenshot

[Ursadon]

There is a video buffer in this memory area: 0x20200000 - 0x20217700
0x17700 = 96000 = 400px*240px

The data is already RLE-unpacked, it remains only to compare with the LUT table, to make a RGB8 picture.
Dumping via CAN takes ~140 seconds. Dumping via JTAG - less than second.

screenshot.png

[Go4IT]

Niiice! I would like to do it via JTAG but i wonder how you set it up and what you use. My attempts to read via JTAG end up in a locked MAC7116

[Ursadon]

I wrote small utility, thatconverts from raw framebuffer dump to .png
Usage:
ConverShooter.exe <filename.raw>
if no filename provided using "framebuffer.bin" as source
Screenshot saved in "screenshot.png"
Also i wrote small script, that dumps framebuffer via JTAG-connected JLink and passing it to utility- TakeScreenShot.bat

screenshot.png

ConverShooter.zip

[DGAlexandru]

Seems that we forgot about this topic and rediscovered the same thing in another thread... also implemented a new function in ConversHacker to show the dumped data as an image.

Should we add JTAG functionality directly to CH?
This would allow new functions to be added like direct MAC7116 FW access by JTAG

[Ursadon]

Should we add JTAG functionality directly to CH?

This is a good idea!
To do this, not so much needed. Just a settings window with a choice of the path to the JLink.exe. Added to project wishlist.