Thread: [Announce] kernel-plus for Harmattan
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juiceme is offline juiceme
2013-11-26 , 22:36
Community Council | Posts: 4,920 | Thanked: 12,867 times | Joined on May 2012 @ Southerrn Finland
#237
Originally Posted by Hurrian View Post
Juice, if it's not too much to ask, what are the dimensions of the debug pads area? Saw the N9 with the physically hacked SIM tray; knowing how deep they go and how wide each pad is would help making an adapter
I'll have to measure those, the pads are fairly large ans I made my first adapter by just guessing at the dimensions and filing the bits until they fit nicely


Originally Posted by Hurrian View Post
LPDDR SDRAM holds the data for quite some time - VRAM glitches on Nemo N900 once spewed out some remaining bitmaps from Maemo 5

What I'm concerned about though, is that ubiboot logging to the RAM buffer would overwrite whatever's remaining in RAM.

The copy code would have to be placed really early in boot, maybe to a procfs entry, subsequently copied when ubiboot-menus is launched.
That takes some studying but it should not be too difficult to ensure there's no overwriting. I had to shuffle the kernel bits around in the latest ubiboot kernel anyway to get the modules load under the 16M limit from the main kernel block.

---- edit -----

Something I thought of today triggered when I thought about the status led flickering in R&D mode... I think it just shows up CPU activity, right?

Well. why not make the status led function as serial output!
That'd be lot easier than using the AUX output, since you'd not need any fancy modulation schemes and the bandwidth would be eornomous

You'd just need a photodiode hookup that you'd place on top of the led, converting it directly to serial signal wired to PC
Last edited by juiceme; 2013-11-26 at 22:41. Reason: thought of something
 

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