EVE2-38G question about of the touch calibration

FTDI/Bridgetek EVE2 Series by Matrix Orbital

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TFTLCDCyg
LCD?
Posts: 1
Joined: Sun Mar 24, 2019 4:53 pm

EVE2-38G question about of the touch calibration

Post by TFTLCDCyg » Sun Mar 24, 2019 10:21 pm

How I can to calibrate the touch screen of EVE2-38G on arduino environment?

Daniel Divino
Matrix Orbital
Matrix Orbital
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Joined: Thu Sep 24, 2015 9:38 am

Re: EVE2-38G question about of the touch calibration

Post by Daniel Divino » Mon Mar 25, 2019 9:28 am

Hi TFTLCDCyg,

Welcome to the forums!

The EVE2-38G uses a FocalTech GT911 touch controller and in order to enable and calibrate the EVE2-38G's capacitive touch panel, you will need to upload a touch configuration file to the EVE2's FT813 chip.This is detailed further in sections 6.6.2 and 6.6.3 of FTDI's Selecting an LCD Display application note published on their website here :

https://brtchip.com/wp-content/uploads/ ... isplay.pdf

The configuration file is considerably large, and will take up a large amount of code space in the Arduino's memory, so it is recommended that you purchase a shield, like our EVE2-SHIELD, with SD card support. You will be able to store the touch configuration file on the SD card, and upload it to the FT813 upon startup, freeing up a lot of Arduino code space.

We will be releasing the EVE2's successor, the EVE3, in the near future. The EVE3 will use FTDI/Bridgtek's new BT815 chip, which will come pre-loaded with the touch configuration file. The BT815 will eliminate the need for uploading the large configuration file, and will reduce the touch setup process down to one register change.

Hopefully this answers your question. If you would like a code example, please let me know.

Cheers,
Daniel
Daniel Divino
Technical Support
Matrix Orbital

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