This layer depends on:
URI: git://git.yoctoproject.org/poky.git
branch: krogoth
revision: HEAD
commit: e93596f
URI: git://git.openembedded.org/meta-openembedded
branch: krogoth
revision: HEAD
commit: 851a064
URI: https://github.com/meta-qt5/meta-qt5.git
branch: krogoth
revision: HEAD
commit: 1ec7767
meta-bbb layer maintainer: Scott Ellis <[email protected]>
Instructions for using this layer can be found on the jumpnowtek site.
Major Software Versions
- Yocto 2.1.1 [krogoth] branch
- Linux kernel 4.4.24 (4.7.7 and 4.8.1 available)
- U-Boot 2016.07
The qt5-image includes Qt 5.6 built for framebuffer use only.
Launch Qt5 apps with the following args
-platform linuxfb
There is a demo qt5 app installed - tspress.
There is a spidev loopback test app installed - spiloop.
The default dtb with the example uEnv.txt enables HDMI
- bbb-hdmi.dtb
There is a dtb without HDMI/display support, freeing up some GPIO pins and UART5
- bbb-nohdmi.dtb
And there are dtbs for a couple of touchscreen capes
- bbb-4dcape70.dtb - for the 4D Systems LCD, 7-inch, 800x480 touchscreen
- bbb-nh5cape.dtb - for the NewHaven Capacitive, 5-inch, 800x480 touchscreen
All the dtbs include the following
- /dev/spidev1.0 - pins P9.28 cs0, P9.29 d0, P9.30 d1, P9.31 sclk - d0 is MOSI
- /dev/i2c1 - pins P9.17 scl and P9.18 sda
- /dev/i2c2 - pins P9.19 scl and P9.20 sda
To switch between these dtbs, take a look at uEnv.txt on the boot partition.
You can mount the boot partition like this
root@beaglebone~# mount /dev/mmcblk0p1 /mnt
root@beaglebone:~# ls -l /mnt
total 466
-rwxr-xr-x 1 root root 64408 Jul 24 09:00 MLO
-rwxr-xr-x 1 root root 410860 Jul 24 09:00 u-boot.img
-rwxr-xr-x 1 root root 1112 Jul 24 09:00 uEnv.txt
You can either modify fdtfile= or you can modify touchscreen_dtb= and also
add a use_touchscreen file to the /boot directory on the root filesystem.
root@beaglebone:~# touch > /boot/use_touchscreen
Those are just some examples. You can easily devise your own strategy for choosing which dtb to load at boot.
To use the nh5cape you will need the ft5x06_ts touchscreen driver
root@beaglebone:~# echo ft5x06_ts >> /dev/modules
You can load it manually with modprobe
root@beaglebone:~# modprobe ft5x06_ts
Or add it to /etc/modules to have it load every boot
root@beaglebone:~# echo ft5x06_ts >> /etc/modules