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Sniffing ubootarm/uart? - Printable Version

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Sniffing ubootarm/uart? - eried - 07-08-2014 06:12 PM

Has anyone sniffed the uart present in the calculator?

[Image: Image%202014-07-08%20at%202.09.29%20pm.png]

I hooked a cheap digital analyzer but got only garbage, fastest captured pulse was about below something valid, but the next one was 0.000008625s (8.625 us) = 115942 bauds... no complete frames though :/

(I am just looking around to make sure that device is recoverable for some more eventual debrouxl dummyos tests xD)

RE: Sniffing ubootarm/uart? - debrouxl - 07-08-2014 06:34 PM

None of the files composing firmware upgrades contains uBoot.

My dummy firmware only writes to the LCD controller and a screen buffer, it does not read from or write to Flash memory, so it's hard to imagine how it could damage the calculator Smile

RE: Sniffing ubootarm/uart? - eried - 07-08-2014 06:51 PM

Sure, I never said that you included anything like uboot. Just wanted to have options in case something fails.