Porting Fastled library to nRF51422

RE: Porting Fastled library to nRF51422

Searay — Mon, 16 Oct 2017 22:16:30 GMT

Hello. Did you ever get FastLED working on the nRF52?

Thank you.

RE: Porting Fastled library to nRF51422

Alex — Tue, 12 Jul 2016 17:36:51 GMT

So I redefined delay() and micros() using the method explained in this post. I also had to do add some includes for the abs() and pow() functions. Now I get an error impossible constraint in 'asm' from the M0_ASM_ARGS definition in m0clockless.h. Do you know what the problem can be?

RE: Porting Fastled library to nRF51422

Alex — Tue, 12 Jul 2016 10:58:38 GMT

After reviewing my makefile, it appears that the redefinition problem is a warning which was treated as an error. However, now I have to redefine the function micros() which is included in the function delay() that you mentioned before. I also have to redefine delayMicroseconds(). For delayMicroseconds(), I suppose I could use the function nrf_delay_us() instead. For micros(), it is a bit more tricky. I see that the definition is in wiring.cpp but is there a description of it somewhere?

RE: Porting Fastled library to nRF51422

Alex — Mon, 11 Jul 2016 14:06:40 GMT

So I tried to include the FastLED library into a new Eclipse project. I modified the standard makefile I have to support .cpp files but I might have done something wrong because I get now a redefinition error on FASTLED_HAS_CLOCKLESS between clockless_arm_nrf51.h and led_sysdefs_arm_nrf51.h.

Do you know what I did wrong?

Best regards

RE: Porting Fastled library to nRF51422

Alex — Wed, 06 Jul 2016 20:11:28 GMT

Would you have by any chance an old makefile from your project on Eclipse?

RE: Porting Fastled library to nRF51422

Alex — Wed, 22 Jun 2016 19:13:29 GMT

Thank you for your detailed answer. I will try it and get back to you if I have some issues. Best regards, Alex

RE: Porting Fastled library to nRF51422

DGarcia / FastLED — Wed, 22 Jun 2016 18:08:01 GMT

I actually developed the nrf51822 support directly inside of eclipse, outside of the arduino environment. You should be able to use the library without wiring. For the most part, the only thing FastLED uses the arduino libraries for is the pinMode method on platforms where I'm feeling too lazy to do direct port manipulation. The only other thing is you might need to make sure there's two methods:

uint32_t millis(); // return the number of milliseconds since device startup (used by the frame rate limiter in the library and by the EVERY_N_MILLI* macros for timing/scheduling)

void delay(uint32_t ms); // delay the given number of millis

Even then, I'm not entirely sure that you'd need millis.

After I finish up the RGBW/RGB16 work i'll go back and do another round of trimming out any remaining arduino dependencies.