Grinn LCD Example

This repository contains various examples for Buildroot and liteSOM device produced by Grinn sp. z o.o. edited for Skalar purposes.

How to setup project with Grinn examples?

Download and extract Buildroot release, for example

wget https://buildroot.org/downloads/buildroot-2019.08.tar.gz
tar xf buildroot-2019.08.tar.gz

Clone this repository

git clone https://github.com/DannyKerstens/Grinn_LCD.git

Configure buildroot to use customizations from this repository

cd buildroot-2019.08
make BR2_EXTERNAL=/tmp/Grinn_LCD list-defconfigs

where /tmp/Grinn_LCD should point to the repository cloned in the 2nd step.(example: /home/username/Grinn_LCD)

Target list-defconfigs shows list of available defconfigs. After built-in configs you should see configs provided by the external customizations (like Grinn examples).

make BR2_EXTERNAL=/tmp/examples list-defconfigs
Built-in configs:
  acmesystems_aria_g25_128mb_defconfig - Build for acmesystems_aria_g25_128mb
  acmesystems_aria_g25_256mb_defconfig - Build for acmesystems_aria_g25_256mb
  [...]
  
External configs in "Grinn examples":
  grinn_liteboard_can_defconfig       - Build for grinn_liteboard_can
  grinn_liteboard_lcd_res_defconfig   - Build for grinn_liteboard_lcd_res
  grinn_liteboard_spi_defconfig       - Build for grinn_liteboard_spi
  grinn_liteboard_telit_defconfig     - Build for grinn_liteboard_telit

Configure build configuration, for example

make grinn_liteboard_lcd_res_defconfig

Build software

make all

When the build is finished you can load the build on a sd card. be adviced this can take some time based on your computer.

sudo dd if=output/images/sdcard.img of=/dev/<SD-CARD> bs=4M

Should point to the location of your sd card. You can find the location with:

lsblk

It should look something like this:

NAME                      MAJ:MIN RM   SIZE RO TYPE MOUNTPOINT
sda                         8:0    0 238.5G  0 disk 
├─sda1                      8:1    0    28G  0 part /
├─sda2                      8:2    0     1K  0 part 
├─sda5                      8:5    0   9.3G  0 part 
└─sda6                      8:6    0 201.2G  0 part /home
sr0                        11:0    1  1024M  0 rom  
mmcblk0                   179:0    0  14.7G  0 disk 
└─mmcblk0p1               179:1    0  14.7G  0 part /media/foo/804b0b54

In this case the sd card is located at mmcblk0. In most cases it is located under sdb.

for information on loading the image on the internal memory i refer to the following tutorial:

https://wiki.grinn-global.com/doku.php?id=litesom:buildroot:qa

Debugging

For the debugging of the litesom you will have to connect the board with a micro USB cable to your desktop. Open a serial port with an application like PuTTY. check wich com port to use and set the baud rate to 115200.

If you did everything correctly you wil have a startup log of the litesom on PuTTY. At the end of the log it will ask for a password. By default this password is root.

Once your logged in you can find some test application in the folder /usr/bin.

External links

• Grinn home page: http://grinn-global.com
• Grinn wiki: https://wiki.grinn-global.com
• chiliSOM platform: http://chilisom.com
• liteSOM platform: http://litesom.com