I'm using Ubilinux because there are so many good features about it.
However, my only issue that I have right now, is how to use the RGBLCD with Ubilinux. It does come with the mraa library, but no documentation on how to use the LCD anywhere, besides changing the color of the screen. I really want to be able to add text to the LCD screen as well.
https://github.com/intel-iot-devkit/mraa/blob/master/examples/python/rgblcd.py mraa/rgblcd.py at master · intel-iot-devkit/mraa · GitHub
I suggest you to first check the latest version of MRAA, to verify you have the latest one. http://iotdk.intel.com/repos/3.0/intelgalactic/opkg/i586/ http://iotdk.intel.com/repos/3.0/intelgalactic/opkg/i586/
The example for LCD provided in https://github.com/intel-iot-devkit/mraa/blob/master/examples/python/rgblcd.py https://github.com/intel-iot-devkit/mraa/blob/master/examples/python/rgblcd.py is for the Grove-LCD RGB blacklight. In order to add text in the LCD I suggest you to check the datasheet of the LCD you are using so you can send the instructions you want.
In case you are using the JHD1313M1 Display, I suggest you to use the UPM libraries and examples.
In Yocto you can use the ipk package from http://iotdk.intel.com/repos/3.0/intelgalactic/opkg/i586/ http://iotdk.intel.com/repos/3.0/intelgalactic/opkg/i586/, and install it with opkg install upm once the repository set in /etc/opkg.
In order to install the library in Ubilinux I suggest you to contact EmutexLabs, they are the owners of the image so they could help you and give you the best way of install this library. http://www.emutexlabs.com/forum/index http://www.emutexlabs.com/forum/index
You can build it by following this instructions: https://github.com/intel-iot-devkit/upm/blob/master/docs/building.md https://github.com/intel-iot-devkit/upm/blob/master/docs/building.md