TFT LCD display series for BeagleBone Black incorporates touch sensing over I²C
The series comprises 4.3-, 5.0- and 7.0- inch models, each equipped with a 30-pin robust FPC cable that plugs into the supplied gen4 CAPE adapter board. No additional connectors are required to operate the display since all power, control and data signals come through the FPC. Use of an adapter board, the cape that plugs directly into the BeagleBone Black, permits ease of using different display sizes to suit the application. In addition, each gen4 CAPE has the choice of either resistive or capacitive touch options.
The resistive touch function uses an on-board Microchip AR1021 resistive touch controller that communicates directly with the BeagleBone Black over I²C in place of traditional LCD capes which utilise the analog inputs that are rather susceptible to external EMI. The capacitive touch models incorporate a cover lens bezel that enables the construction of a robust yet slim design with ease, utilizing Focaltec CTP controller that communicates over I²C. The different size versions come either with resistive touch or with capacitive touch and a cover glass. Changing the display backlight brightness is facilitated through the use of a TI TPS61165 backlight driver IC for which a Linux driver is also provided.
4D Systems – www.4dsystems.com.au
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