Hey I was wondering if anyone has successfully tried the FastLed on an Atmega1284

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Hey I was wondering if anyone has successfully tried the FastLed on an Atmega1284 chip? I am trying to get my code ported from an old version of FastSPI_LED2 over to the new FastLED but currently I can’t even get the example sketches working.

I am using ArduinoISP to program the chip, and if I use FastSPI_LED2 everything works great. Anyone got any tips for troubleshooting? FastLED is working for me on my UNO and Nano, so it’s not a compiling or library problem, the issue is purely with the Atmega1284, and as I said the old library works fine.

I am really hoping to try out some of the noise functions but almost all of my led strip is soldered onto the Atmega1284P’s, and encased in plastic.

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It’s possible that the pin mapping defined for the Atmega1284P isn’t lining up to what you’re expecting/wiring on your soldered boards. The definitions I have are for one of those whack-job arduino expansion boards. If you look in fastpin_avr you can find the block where pin to port mappings are defined for the 1284P:

#elif defined(AVR_ATmega1284P)

_IO(A); _IO(B); _IO(C); _IO(D);

_DEFPIN_AVR(0, 1<<0, D); _DEFPIN_AVR(1, 1<<1, D); _DEFPIN_AVR(2, 1<<2, B); _DEFPIN_AVR(3, 1<<3, B);
_DEFPIN_AVR(4, 1<<0, B); _DEFPIN_AVR(5, 1<<1, B); _DEFPIN_AVR(6, 1<<2, D); _DEFPIN_AVR(7, 1<<3, D);
_DEFPIN_AVR(8, 1<<5, D); _DEFPIN_AVR(9, 1<<6, D); _DEFPIN_AVR(10, 1<<4, B); _DEFPIN_AVR(11, 1<<5, B);
_DEFPIN_AVR(12, 1<<6, B); _DEFPIN_AVR(13, 1<<7, B); _DEFPIN_AVR(14, 1<<7, A); _DEFPIN_AVR(15, 1<<6, A);
_DEFPIN_AVR(16, 1<<5, A); _DEFPIN_AVR(17, 1<<4, A); _DEFPIN_AVR(18, 1<<3, A); _DEFPIN_AVR(19, 1<<2, A);
_DEFPIN_AVR(20, 1<<1, A); _DEFPIN_AVR(21, 1<<0, A); _DEFPIN_AVR(22, 1<<0, C); _DEFPIN_AVR(23, 1<<1, C);
_DEFPIN_AVR(24, 1<<2, C); _DEFPIN_AVR(25, 1<<3, C); _DEFPIN_AVR(26, 1<<4, C); _DEFPIN_AVR(27, 1<<5, C);
_DEFPIN_AVR(28, 1<<6, C); _DEFPIN_AVR(29, 1<<7, C); _DEFPIN_AVR(30, 1<<4, D); _DEFPIN_AVR(31, 1<<7, D);

E.g. pin 0 is D0 (port D, pin 0), pin 2 is on B2 (port B, pin 2), etc…

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Thanks Daniel, I found it on pin 5 (previously pin 1) That was simple. Time to play!!!