Re: [jornada] de-brick

* John Ankcorn <ankcorn@hpl.hp.com> [021009 03:31]:

>I am glad that you have made so much progress!

It took me a little longer than expected to find the screwdriver. I
finally went to buy one to a good electronics components shop, and found
a nice one which was not that expensive.
Thanks so much for sending off the instructions :)

>It sounds like jflash is working just fine. I will locate a
>bootldr image and send you a pointer.

I still think there is something wrong. I checked the connections again,
specially to make sure there was no shorcute between the five pinouts
wired on the Jornada, as the are pretty tight. It seems they're are well
isolated from each other, and the signal on the corresponding pport pin
is good.

Yet to make jflash run I have to try like 30-50 times, since it always
gives some error... I'll just try a few times now...

JFLASH Version xxx
current control 20
SA-1110 revision B4
error reading flash attribute space
check cables, power and flash sockets

[6 times]

JFLASH Version xxx
current control 20
error, failed to read device ID
ACT: 1111 1111111111111111 11111111111 1
EXP: **** 1001001001100001 00000001001 1

failed to read device ID for the SA-1110

A few more times the first message, then again once more the latter.
I've just realized that while presing th back reset button, I always get
the second message.

I'm afraid that I can't make it run right now...

>The program does indeed take forever to run. There are
>2 reasons for this: 1) it is toggling individual pins on the
>parallel port by successive kernel ioctl calls (with lots
>of overhead on each bit transmitted) and 2) there are built
>in delays in the program (which are probably not necessary)
>to make sure that the Jtag interface is not overrun with
>data.

>As I recall, it takes about 10 - 20 minutes (or maybe it just
>feels like it) on my machine to download bootldr.

Trying to read the bootldr from the PDA to my PC, more than half an hour
it was still at a 5% with ~2MBytes transferred.
Seeing the size I figure it was not only the bootldr but the whole
flash.
I could not find any sign of strings within those two megabytes, such as
those one can find reading the original wince flash.

>> Jornada IR is here at the top, and the joranada is facing down:
>> Jornada pin 1
>> Jornada pin 2
>> Jornada pin 3 -> 100 ohm resistor -> parallel port pin 2
>> Jornada pin 4 -> 100 ohm resistor -> parallel port pin 4
>> Jornada pin 5 -> 100 ohm resistor -> parallel port pin 14
>> Jornada pin 6 -> 100 ohm resistor -> parallel port pin 11
>> Jornada pin 7 -> 100 ohm resistor -> parallel port pin 3

Do you confirm then that the connection must be made as above?
I'm just asking because I believe to have read something about one of
the pings only being needed for development SA1110 boards or something
like that...

-- 
Javier Marcet <jmarcet@pobox.com>
Saint Louis University, Madrid Campus