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Original question:

LP-EM-CC35X1: Add RGB LED and dimming support for Matter Demo

LP-EM-CC2745R10-Q1: Add dimming support to matter lighing-app demo

Munan Xu
Expert 5190 points
Part Number: LP-EM-CC2745R10-Q1


Tool/software:

Hello,

Similar request for the CMCU team as with the WiFi team. The matter 1.4 lighting app demo doesn't support dimming it's only on / off control despite the demo being configured both as an RGB light as well as dimmable.

I understand that the launchpad doesn't have an RGB LED, but at minimum I would expect the RED LED to dim.

Munan

  • 0
    TI__Mastermind 35070 points

    Hi Munan,

    Yes, you are correct, the LED on lighting-app currently acts as on-off. (I believe this is an artifact from lighting-app being ported over from lock-app a few years ago).

    The syscfg could be re-configured to support dimming by routing the LEDs to PWM (instead of GPIO), an example implementation here: pwmled1

    For this board specifically (LP-EM-CC2745R10-Q1):

    • Red LED: LGPT3 Ch0 set pin to DIO16 (datasheet calls this T3C0)
    • Green LED: LGPT3 Ch1 set pin to DIO12 (datasheet calls this T3C1)

    Thanks,
    Toby