Re: [grub-devel] loongson-2f mini-pc (fuloong) elf image generation.

[Gregg Levine <gregg.drwho8@gmail.com>]

Hello!
Your description of the classic Null-Modem device is correct. The baud
rate isn't. it is 115200 not the value you used.
-----
Gregg C Levine gregg.drwho8@gmail.com
"This signature fought the Time Wars, time and again."


On Tue, Sep 17, 2013 at 5:10 PM, Aleš Nesrsta <starous@volny.cz> wrote:
>>> # stty -F /dev/ttyUSB0 9600 -echo
>>> # cat /dev/ttyUSB0 > ttyUSB0.txt
>
>
> It was 9600 usually, but probably it should be 112500 now, as Vladimir
> wrote.
> If you want, you can ensure some speed on GRUB side by parameter -s ,e.g.:
> serial -s 112500
>
>
>>> serial
>>> terminal_output console serial
>>> debug=all
>>> insmod ohci
>>> insmod ehci
>>> ls
>>
>> I didn't get anything captured, sorry...  But with the serial setup,
>>
>> grub seems to freeze on:
>>
>> disk/pata.c:274:  status=0x50, error=0x0, sectors=0x0
>> kern/disk.c:326:  Closing `ata0'.
>
>
> Something changed in GRUB in the meantime, so try this for current trunk
> code:
>
>
> serial
> terminal_output console serial
> debug=all
> nativedisk
> ls
>
>
>
>> My mistake, the adapter is not a null modem.
>
> At least these pins must be connected by null-modem cable:
> 3 - 2
> 2 - 3
> 5 - 5
> This is valid for "classic" 9pin PC connectors on both sides of cable. You
> can check the cable by ohmmeter if it is correct.
>
>
> Additionally:
> There exist some important USB related patches which are not included in
> trunk yet - see the history of mail list and search for posts from me and
> Melki Christian some weeks ago.
>
> BR, Ales
>
>
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