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8devices Community :: View topic - serial garbage on boot
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serial garbage on boot
https://www.8devices.com/community/viewtopic.php?f=13&t=837
Page 1 of 1

Author:  slemke [ 11 Nov 2014, 23:26 ]
Post subject:  serial garbage on boot

Hello everyone,

I am just playing around with the carambola2 - fantastic device. I am thinking about using it in one of our projects. For this I have to make the serial console silent. I compiled the modified u-boot from pepe2k (also fantastic work!) with the silent-option.

It works all fine, but I mentioned that there is very often one or two "garbage chars" before the u-boot boot-message. This appears with the original u-boot (!) and also with my self-compiled ones.

Please take a look at the attached screenshots. What´s the reason for this? Can I suppress this in any way?

Thanks,
Sebastian

Attachments:
File comment: pepe2k u-boot (with normal defaults)
serial-pepe2k-normal.JPG
serial-pepe2k-normal.JPG [ 208.2 KiB | Viewed 2372 times ]
File comment: original u-boot
serial-original.jpg
serial-original.jpg [ 178.73 KiB | Viewed 2372 times ]
File comment: pepe2k u-boot with silent option compiled
serial-pepe2k-silent.JPG
serial-pepe2k-silent.JPG [ 206.64 KiB | Viewed 2372 times ]

Author:  Giedrius [ 12 Nov 2014, 20:39 ]
Post subject:  Re: serial garbage on boot

This is a problem with the older serial driver that is used in older bootloader. The new Caraboot bootloader doesn't have this problem, however I'm not quite sure if pepe2k silent mod will work with it.

Author:  pepe2k [ 12 Nov 2014, 22:27 ]
Post subject:  Re: serial garbage on boot


Author:  Giedrius [ 13 Nov 2014, 11:26 ]
Post subject:  Re: serial garbage on boot

I think so. Maybe you can answer if (and how) it can be silenced.

Author:  pepe2k [ 13 Nov 2014, 12:13 ]
Post subject:  Re: serial garbage on boot


Author:  pepe2k [ 19 Nov 2014, 18:57 ]
Post subject:  Re: serial garbage on boot


Author:  Giedrius [ 20 Nov 2014, 08:18 ]
Post subject:  Re: serial garbage on boot

What bootloader version are you using? We did not see any trash bytes with the new Caraboot bootloader.

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