Controlling an RGB LED with Nordic nRF51-DK

RE: Controlling an RGB LED with Nordic nRF51-DK

Mahesh Venkitachalam — Fri, 31 Jul 2015 06:14:52 GMT

Nice idea, Peter. SPIS is something I haven't looked into yet.

RE: Controlling an RGB LED with Nordic nRF51-DK

Mahesh Venkitachalam — Fri, 31 Jul 2015 05:23:49 GMT

Thanks Aryan. I am looking at motor drivers - I update my twitter feed regularly on stuff I am working on: twitter.com/electronutIN

RE: Controlling an RGB LED with Nordic nRF51-DK

Susheel Nuguru — Thu, 30 Jul 2015 19:04:09 GMT

you rock electronut. What is the next sensor in your BLE adventure?

RE: Controlling an RGB LED with Nordic nRF51-DK

Peter Myerscough-Jackopson — Wed, 29 Jul 2015 09:54:40 GMT

You should be able to achieve it using the SPIS and creating a clock from the timers at the right rate, 24kHz should work with 100 and 110 representing a 0 or 1 for the WS2812. Loop back a GPIOTE pin to control the SPIS clk and control the SPIS CE via another GPIOE. It is something I intend on getting working for a home project of mine.

RE: Controlling an RGB LED with Nordic nRF51-DK

Mahesh Venkitachalam — Tue, 28 Jul 2015 04:40:29 GMT

Thanks! I have looked into the WS2812 - but doing it with GPIOTE and PPI is turning out to be very difficult, because interrupts don't work at that high frequency. Others have done it by carefully timing it using assembly language instructions in the radio off callback - I think I'll look into that...

RE: Controlling an RGB LED with Nordic nRF51-DK

syntroniks — Mon, 27 Jul 2015 20:04:00 GMT

Sweet, next suggestion for your tutorials: a ws2811 implementation.

You've got lots of good posts