Olimex Support Forum
OLinuXino Android / Linux boards and System On Modules => A20 => Topic started by: tejas.s on August 13, 2019, 10:36:07 AM
1. How to disable the Serial Console log in LCD during the U-Boot stage? I am using Lime2 Rev.K board "A20-OLinuXino-LIME2-e4Gs16M" with a 7" LCD. Image used is "Armbian_5.89 with Ubuntu bionic".
There is a serial console log displayed on the LCD during the U-Boot stage which stays on for a brief period of less than 5 seconds.
Printenv:: (only selected outputs..)
Quoteconsole=ttyS0,115200
lcd_olinuxino=7859
monitor=lcd
serial#=00007f98
stdout=serial,vga
2. What is the change in U-boot build process for armbian image?In the previous revision of Lime2 boards, I have changed the u-boot code to wait until PWR_BTN is pressed to start the boot operation.
In the Armbian image, "U-Boot 2019.04-armbian" revision is used.
I have downloaded the source from github "https://github.com/u-boot/u-boot/releases/tag/v2019.04 (https://github.com/u-boot/u-boot/releases/tag/v2019.04)" and made the necessary changes for the power-button wait condition and built the u-boot with modified source file.
using the following command u-boot is written to the SD-card with Armbian_5.89 with Ubuntu bionic image.
dd if=u-boot-sunxi-with-spl.bin of=/dev/sda bs=1024 seek=8
Using this SD-Card the linux boots-up but the option to select the LCD in u-boot is not available.
Which is the correct u-boot source which is compatible with the emmc-rev.k board with armbian image?
Or How to make use of the patch in "https://github.com/armbian/build/tree/master/patch/u-boot (https://github.com/armbian/build/tree/master/patch/u-boot)" to build the u-boot?
Or How to build U-Boot 2019.04-armbian"?[/i]