On 27.10.21 23:03, Pali Rohár wrote:
On Wednesday 27 October 2021 17:27:41 Stefan Roese wrote:
Still I see no speed change. But this is a different story...
Could you try to upload some file in u-boot via xmodem at different speeds? E.g. via loadx command:
loadx <addr> 921600
and
loadx <addr> 115200
loadx & loady are producing nearly the same numbers on my Armada XP target for download (slow of cause). This is really strange.
I also tested with "normal" console actions (logging) with higher baudrates. Here these numbers:
time md 2000000 10000:
115200 baud: time: 1 minutes, 32.694 seconds
921600 baud: time: 11.587 seconds
92.7s vs 11.6s -> factor ~8. Which is exactly the baudrate difference. So at least here I see a speed difference, which means that the USB UART converter must be working in general. I really have no idea right now to explain, why this does not any speed differences while downloading.
And compare if xmodem transfer is in U-Boot faster or not. Ideally also try via kermit protocol at different speeds as kernel supports streaming.
I'm currently struggling to get gkermit working on my Ubuntu machine - so no numbers here yet, sorry.
This could verify if issue is in kwboot or in USB-UART/kernel.
Makes sense.
Thanks, Stefan