* higher uart baud rate corrupts image..
@ 2002-09-25 14:23 atul srivastava
2002-09-27 14:03 ` John Nikiforos
0 siblings, 1 reply; 2+ messages in thread
From: atul srivastava @ 2002-09-25 14:23 UTC (permalink / raw)
To: linuxppc-embedded
A quick question..
i have been to use succesfully bootloader kernel and ramdisk , but
only on certain serial port speed .
I am facing a data corruption in dowloading kernel+ramdisk image
at higher serial port speed.
if i set my baud speed to 19200 it WORKS FINE.
otherwise at higher serial port speed the execve of /bin/sh just
hangs and .
also this problem is related to cpu frequency when i make that
lower or higher the behaviour changed unpredicatabley.
somebody pointed for skew problem woth sdram at higher cpu
frequency.
any body has more here to add...
__________________________________________________________
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^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: higher uart baud rate corrupts image..
2002-09-25 14:23 higher uart baud rate corrupts image atul srivastava
@ 2002-09-27 14:03 ` John Nikiforos
0 siblings, 0 replies; 2+ messages in thread
From: John Nikiforos @ 2002-09-27 14:03 UTC (permalink / raw)
To: atul srivastava, linuxppc-embedded
What serial terminal do you use?
I had the same problem when I was using hyperterminal.
When I changed to SecureCRT, everything workds fine!
John.
--- atul srivastava <atulsrivastava9@rediffmail.com>
έγραψε: >
> A quick question..
>
> i have been to use succesfully bootloader kernel and
> ramdisk , but
> only on certain serial port speed .
>
> I am facing a data corruption in dowloading
> kernel+ramdisk image
> at higher serial port speed.
>
> if i set my baud speed to 19200 it WORKS FINE.
>
> otherwise at higher serial port speed the execve of
> /bin/sh just
> hangs and .
>
> also this problem is related to cpu frequency when i
> make that
> lower or higher the behaviour changed
> unpredicatabley.
>
> somebody pointed for skew problem woth sdram at
> higher cpu
> frequency.
>
> any body has more here to add...
>
>
__________________________________________________________
>
>
>
** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/
^ permalink raw reply [flat|nested] 2+ messages in thread
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2002-09-25 14:23 higher uart baud rate corrupts image atul srivastava
2002-09-27 14:03 ` John Nikiforos
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