Linux on the RIoTBoard Part 1: U-Boot

RE: Linux on the RIoTBoard Part 1: U-Boot

Former Member — Fri, 05 Feb 2016 03:36:48 GMT

The repo's referred to here are broken, giving errors like

W: GPG error: http://www.emdebian.org unstable InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY B5B7720097BB3B58

which prevents apt-get install gcc-4.7-arm-linux-gnueabihf from working

RE: Linux on the RIoTBoard Part 1: U-Boot

toonamo — Wed, 13 May 2015 20:58:11 GMT

is there a way to add gui support? After following this tutorial i get a command line over hdmi but if i attempt to install and run lxde it fails. seems to be a fb error.

I also noticed we aren't using and cflags for vpu or cpu for the riotboard (ie CFLAGS=-O2 -mcpu=cortex-a9 -mfpu=vfpv3-d16 -mfloat-abi=hard)

The uboot specifies only 10MB of ram, does the vmalloc flag basically say to allocate up to 400MB in additional memory to the vpu if it needs it? can i just allocate 256MB rather than 10 and drop the vmalloc to 256MB as well?

is it possible it's because we are compiling a kernel without a video driver that can support accelerated graphics?

another thing i noticed was

echo 'deb http://www.emdebian.org/debian/ unstable main' >> /etc/apt/sources.list

doesn't state the actual release we are using and the wiki (https://wiki.debian.org/EmdebianToolchain) says Emdebian toolchains are no longer supported ... Emdebian toolchains are not supported after squeeze. Modern multiarch-aware cross-toolchains are available from CrossToolchains.

so following https://wiki.debian.org/CrossToolchains it states the deb should be

deb http://emdebian.org/tools/debian/ jessie main

(only because my compiler environment is debian 8)

the section about the keyring didn't work for me either instead i had to:

apt-get install curl

curl http://emdebian.org/tools/debian/emdebian-toolchain-archive.key | sudo apt-key add -

that took care of the gpg warning/error

then instead of

apt-get install gcc-4.7-arm-linux-gnueabihf

i used

sudo dpkg --add-architecture armhf

sudo apt-get update

sudo apt-get install crossbuild-essential-armhf

which gives me gcc-4.9-arm-linux-gnueabihf

i am going to attempt recompiling again with these tools and the cflags i mentioned and see if that helps...

RE: Linux on the RIoTBoard Part 1: U-Boot

bose — Sun, 03 May 2015 12:47:45 GMT

Hello,

I am trying out the latest version of the U-Boot repo.

The part CONFIG_BOOTCOMMAND is completely missing in the file "include/configs/embestmx6boards.h".

I did a grep to search into the config directory also but looks like some thing has fundamentally changed.

I have the earlier version of the Uboot also and it works fine.

However this problem has shown in the latest build tags: v2015.01 and v2015.04

Kindly help me out if there is any thing that needs to be patched to make this work.

Warm Regards,

Abhijit

RE: Linux on the RIoTBoard Part 1: U-Boot

Former Member — Mon, 20 Apr 2015 19:29:06 GMT

I am trying now to install openElec on my riotboard. If my understanding is correct the main hurdle here is to tailor u-boot properly... Do you have any experience with this?

RE: Linux on the RIoTBoard Part 1: U-Boot

Former Member — Mon, 20 Apr 2015 19:13:34 GMT

Meanwhile I have just used the standard u-boot and set the parameters manually:

https://community.freescale.com/message/502767#502767

RE: Linux on the RIoTBoard Part 1: U-Boot

Former Member — Sun, 05 Apr 2015 12:42:30 GMT

I am trying to redo this tutorial atm as the server with the final files is not available anymore.

I am currently stuck with modifying the embestmx6boards.h as the file has changed quite a bit.

I cannot find the #define CONFIG_BOOTCOMMAND section anymore.

Does anyone have a suggestion where these commands have to go now?

RE: Linux on the RIoTBoard Part 1: U-Boot

Former Member — Sun, 22 Feb 2015 17:09:39 GMT

The download link for uboot is down. Could i get an alternate link?

RE: Linux on the RIoTBoard Part 1: U-Boot

bose — Fri, 03 Oct 2014 14:15:18 GMT

Very detailed U-Boot build procedure.

I think combining this with the Tushar's Uboot eclipse build would create the best and easy to use build system for RIot.

However I think command line stuff some times is difficult to emulate in eclipse.

Thanks for sharing.

RE: Linux on the RIoTBoard Part 1: U-Boot

xw024 — Tue, 30 Sep 2014 09:26:49 GMT

Thanks for sharing. Best on the subject so far