topic Porting WS2812B code to FRDM-K82F in Kinetis Design Studio

Porting WS2812B code to FRDM-K82F

tishampatidhar — Wed, 15 Jun 2016 03:38:22 GMT

I have been following the tutorial for using FlexIO to drive the custom protocol for WS2812. I have renamed some registers to port to K82F. However I am unsure about porting the register style DMA access to Kinetis SDK style EDMA usage. Any pointers appreciated. My code is available here:

FRDM-K82F_WS2812_Driver/WS2812.c at master · whatnick/FRDM-K82F_WS2812_Driver · GitHub

DMA section is commented out. A review and pull request will enable me to learn and bring the NeoPixel to K82F.

Regards,

Tishampati Dhar

Re: Porting WS2812B code to FRDM-K82F

ZhangJennie — Thu, 16 Jun 2016 10:05:32 GMT

HI,

I suggest you go to Welcome to Kinetis Expert | Kinetis Expert

to download SDK_2.0_FRDM-K82F package, then refer edma demo code in this folder:

..\SDK_2.0_FRDM-K82F\boards\frdmk82f\driver_examples\edma

Have a great day,
Jennie Zhang

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Re: Porting WS2812B code to FRDM-K82F

marc3l — Fri, 24 Jun 2016 14:50:29 GMT

Thank you for opening this tread; I have the same problem with connecting the Neopixels / WS2812b leds to my FRDM K82F board. As ZhangJennie mentioned; I also tried the edma code, and many other (sample)projects to combine it with the work that BlackNight made with his WS2812 with FlexIO project. But until now I couldn't light up the Neopixels yet.

If anyone has a solution, please share it! You will be thanked with a lot of colorful light

Re: Porting WS2812B code to FRDM-K82F

tishampatidhar — Fri, 24 Jun 2016 22:47:17 GMT

Hi Marcel,

I have been banging my head against it for a couple of weeks as well.

Implementation obviously requires good understanding of the MCU and we must

be missing some settings. I have made 2 compilable ports from Erichs work

for both SDK 1.3 and 2.0 on github. I would appreciate if you had a look

and fiddled to see if you could get it to work. From my observation so far

the DMA transfer seems to be getting stuck.

Cheers,

Tisham.