©2018 NEC Display Solutions, Ltd. Page 17 of 713.4 Software control via IR RemoteAn IR Remote can be used to control software running on the Compute Module, such as a media player.IR Remote control signals are received via the display’s built-in IR remote sensor or via an optionalexternal KT-RC2 sensor.This feature can be used in two ways:• As a CEC (Consumer Electronics Control) deviceSpecific buttons on the NEC IR Remote will perform actions, such as Stop, Play, Next, Previous,etc., on CEC enabled software on the Compute Module. The display is responsible for receivingand decoding the IR Remote signals, and then forwarding them on to the Compute Module asstandard CEC commands.Only the NEC IR Remote can be used and CEC support must be enabled on the display and in theOperating System on the Compute Module. See Figure 3.4-3: Supported CEC buttons on the NECIR Remote.The buttons used for CEC commands are dual-function on the NEC IR Remote. When thedisplay’s OSD is active (being displayed) the buttons will perform display related functions.When the OSD is not active the buttons will perform CEC functions. Press the EXIT button on theIR Remote to exit and deactivate the OSD.See sections 8.15 and 8.16 for more information.• As a generic IR receiverDemodulated raw IR signals received by the IR remote sensor are passed to the Raspberry PiCompute Module via GPIO 18. Packages such as lirc can be used to decode the raw IR signals.IR Remotes other than the NEC IR Remote, such as a standard MCE/RC6 type, can be used aslong as they use a 40 KHz carrier. See sections 7.4 , 7.5 , and 8.5 for more information.
