Pixhawk external I²C LED docs?

Development Team
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1

Morning! Could anybody point me to the docs for the external I²C LED? I was thinking of coding a WS2812b controller which compatible command set.

2

depends on which external LED you are specifically referring to… however mostly these are ToshibaLED devices, and are programmed via the AP_Notify library in ArduPilot.
These were chosen in preference to BlinkM due to two issues at the time:
1 - blinkm cost nearly double, and 2 - blinkm licensing was non-comercial, so limiting.
https://github.com/ArduPilot/ardupilot/issues/2466
http://discuss.ardupilot.org/t/double-driver-source-code-for-toshiba-rgb-led/9919
https://www.youtube.com/watch?v=uoXTIsGBbWA

3

Thanks! I was thinking of the original LED - I haven’t followed the development in the last year or so due to personal reasons but good to know that there’s something new coming up. I might wanna integrate that too :).

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5

Looks easy enough to implement. Umm, how does the AP differentiate between external and internal LED? By I²C ID or by bus ID? /libraries/AP_Notify/ToshibaLED_PX4.cpp includes drivers/drv_rgbled.h. It might be because it’s early in the morning but where is the drivers subdir?

6

I just did a driver for the PixRacer onboard LED and I had to make changes in the APHAL as well as build a new class for the LED. I believe the internal i2c LED driver is for the onboard LED in the Pixhawk and the external i2c driver is for the Toshiba LED.

Mike

7

Found it and prototype is already working :). Now I have to cleanup the code and throw it to Github.

8