* why so slowly when use serial to download S-record file?
@ 2002-11-23 4:42 caixupeng
2002-11-25 8:56 ` Kenneth Johansson
0 siblings, 1 reply; 2+ messages in thread
From: caixupeng @ 2002-11-23 4:42 UTC (permalink / raw)
To: linuxppc-embedded
Dear all,
my ppcboot is 1.2.1
and I set baud rate to 38400, but it need almost 4 hours to download a 2 Mega bytes file.
what's wrong ?
my board is ebony.
Who know the reason?
please tell me.
thanks!
edmoon
** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: why so slowly when use serial to download S-record file?
2002-11-23 4:42 why so slowly when use serial to download S-record file? caixupeng
@ 2002-11-25 8:56 ` Kenneth Johansson
0 siblings, 0 replies; 2+ messages in thread
From: Kenneth Johansson @ 2002-11-25 8:56 UTC (permalink / raw)
To: caixupeng; +Cc: Linuxppc embedded
The reason is that ppcboot/u-boot only support a very simple version of
kermit where the sender waits for an ack before sending another block.
kermit should have a mode that is as efficient as some of the
[x|y|z]-modem maybe you could add that code to u-boot.
On Sat, 2002-11-23 at 05:42, caixupeng wrote:
>
> Dear all,
>
> my ppcboot is 1.2.1
> and I set baud rate to 38400, but it need almost 4 hours to download a 2 Mega bytes file.
> what's wrong ?
>
> my board is ebony.
>
> Who know the reason?
>
> please tell me.
>
> thanks!
>
> edmoon
>
>
--
Kenneth Johansson
Ericsson AB Tel: +46 8 404 71 83
Borgafjordsgatan 9 Fax: +46 8 404 72 72
164 80 Stockholm kenneth.johansson@etx.ericsson.se
** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/
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2002-11-23 4:42 why so slowly when use serial to download S-record file? caixupeng
2002-11-25 8:56 ` Kenneth Johansson
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