How to calibrate the touchscreen using the A20 official images
The purpose of this article is to give a brief explanation on how to calibrate the touchscreen component while using an A20 board and official Debian image. The guide focuses on using the calibration tool available in the GUI.
The article assumes that the customer is using a hardware setup consisting of products manufactured by Olimex LTD - e.g. display, touchscreen component, A20 board all made by Olimex. The article also assumes that the customer is using the latest official Debian image for his A20 board (each board has own official image).