AXEL ULite SOM/AXEL ULite Evaluation Kit/Interfaces and Connectors/Touchscreen

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Version Issue Date Notes
1.0.0 Jul 2021 First DESK release

Touchscreen interface[edit | edit source]

Description[edit | edit source]

The Touchscreen interface is available on the AXEL ULite Evaluation Kit at the optional J5 connector.

J5 is a Molex 53398-0671 6 pin connector for connecting a I2C touchscreen controller device.

Touchscreen connector

Signals[edit | edit source]

The following table describes the interface signals:

Pin# SOM Pin# Pin name Function Notes
J5.1 - 5V or 3V3 depending on internal connection -
J5.2 J1.44 SDA I2C SDA -
J5.3 J1.42 SCL I2C SCL -
J5.4 J1.89 INT Interrupt -
J5.5 J1.128 RES Reset -
J5.6 - DGND Ground -

Device mapping[edit | edit source]

The device is typically mapped to /dev/touchscreen0 device in Linux.

Device usage[edit | edit source]

The touch controller is attached to the generic Linux input event interface (evdev).