Hi Nikolaus,
If your serial console is not working on a working minibook
1) Wrong connection to minibook. Check
http://projects.kwaak.net/twiki/bin/view/Epc700/SerialConsoleHowto
2) run a terminal #/sbin/getty -L /dev/ttyS0 115200 vt100. Make sure the
external terminal uses same baudrate / protocol as the minibook.
Some nice background of serial console howtos
http://tldp.org/HOWTO/Serial-HOWTO.html
If your serial console is working on a working minibook
3) Your minibook is really bricked like a stone. I wonder if you get the JTAG
working then. UART could be disabled, etc..
If not working JTAG , then last resort is flash the nand by flash programmer.
ftp://ftp.ingenic.cn/3sw/00tools/nandprog/JZ4730_NANDPROGRAMMER_V1.0.pdf
ftp://ftp.ingenic.cn/3sw/00tools/nandprog/NandProgrammer_Manual.pdf
Question are then:
- which connections to make to the minibook for nandflash or JTAG.
- which software & source modification is needed for the minibook (like jtag
patterns to send, nand ecc, size, etc)
Grt Ruben.
> From: h...@computer.org
> Date: Tue, 6 Jul 2010 17:13:07 +0200
> To: mipsbook-devel@linuxtogo.org
> Subject: Re: [Mipsbook-devel] how to recover U-Boot...
>
>
> Am 11.06.2010 um 21:01 schrieb Nils Faerber:
>
> > I toasted one of mine in the very early beginning and came up with the
> > same results - only JTAG is possible if UBoot is really dead.
> >
> > Probably try the serial console before giving up...
>
> it took a while to get the required parts and find time to solder them into a
> nice rs232 adapter. The Oscilloscope shows that the converter is working and
> it does not look as if I crossed over anything.
>
> But no response on serial...
>
> I may still have to test the adapter on a different device.
>
> So, the next step will be to get a proper JTAG connector and interface to the
> Openmoko Debug Board (if possible) - and learn how to use it. Generally it
> would be nice to find a method to unbrick these Mipsbooks...
>
> Nikolaus
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