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Rockbox mail archiveSubject: Re: Player flashingRe: Player flashing
From: sophana <jobarjo78_at_yahoo.fr>
Date: Thu, 24 Jun 2004 12:22:49 +0200 [IDC]Dragon wrote: >>You know what, I had a look at the datasheets. It is incredible that >>they made such a flash which is not designed to be flashed in situ (like >>all other) >> >> > >It's an older chip, and probably was just cheaper. > > > >>But it should be still possible to program the flash by controlling 2 >>pins: >>first apply 12v on the CE (should be controlled by software, 12v from >>external device of course) >>then play with the sh1 wait state pin to make 10us write pulses. This >>little logic can be implemented in a very smal PLD adding wait states >>only for write accesses. >>the timings seem compatible... >> >>Then to program the flash the software just have to apply the 12v, then >>directly write into the flash. >> >>what do you think of that? >> >> > >I think you should replace the chip, this is way more easy. > >Having the old chip would be very uncomfortable, even if you add programming >logic to your player (insulate the rest from the 12V!). You'd just be able >to reprogram the whole chip, it does not have sectors. So the .ucl update >business would not work. > > > you're right. But I don't think I have sufficient hardware and skill to replace a TSOP chip. :-( Are there lot of flashable players released? I'll look at a friend's studio 20 if it is flashable. But I don't think he would let me mod his archos... My player is in my car and is modded for my car application. If I want to try the uart boot mod, I'll have to port my rockbox mod for the recorder I've just bought (which is flashed) Then I could try to boot from uart. (I also have to check I have a rom) But having a non flashable player is not very motivating. >About UART boot, I have pasted some tidbits of text into a wiki page: >http://rockbox.haxx.se/twiki/bin/view/Main/UartBoot >It's plain raw, I need to structure it. > >Jörg > > > _______________________________________________ http://cool.haxx.se/mailman/listinfo/rockbox Received on 2004-06-24 Page template was last modified "Tue Sep 7 00:00:02 2021" The Rockbox Crew -- Privacy Policy |