Hello, I need some help with a project I'm working on.

acul009 · December 23, 2018, 2:56pm

Hello, I need some help with a project I’m working on.
I want to read the type of LED-strip from an sd-card, but I don’t how to actually do that or if it’s even possible.

Summary:
I want to change the NEOPIXEL at runtime to something else:
FastLED.addLeds<NEOPIXEL, DATA_PIN>(leds, NUM_LEDS);

Jason_Coon · December 23, 2018, 4:56pm

It can be done, but it’s not easy. FastLED uses templates to compile only what’s being used, to save flash and ram.

You can search this community for “runtime” and “AllPixel”: https://plus.google.com/communities/109127054924227823508/s/allpixel

github.com

ManiacalLabs/AllPixel/blob/master/Firmware/Firmware.ino

#include "FastLED.h"
#include <EEPROM.h>
#include "global.h"

CRGB * _fastLEDs;

uint16_t numLEDs = 1;
CLEDController * pLed = NULL;
bool errorPixelCount = false;
uint8_t bytesPerPixel = 3;

inline void setupFastLED()
{
	switch (config.type)
	{
#ifdef GENERIC
	case GENERIC:
		//update this to whatever your setup uses
		bytesPerPixel = 3;
		break;

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marmil · December 23, 2018, 5:00pm

More thoughts here:
https://plus.google.com/100381267865582812229/posts/dnAHZ3wJq1N
https://plus.google.com/100381267865582812229/posts/dnAHZ3wJq1N

10e05991b0888ec5312e · December 23, 2018, 10:29pm

maybe you can compile all your possible strips, and then decide by function which to use later?

acul009 · December 24, 2018, 10:33am

Thank you for your help.
I’m trying to make a system that is easy to use and can be configured with an additional program I’m going to write. Because I don’t know which strip type and pin is going to be used, I’m thinking about creating the c code from the settings and then uploading it in the backround via the arduino ide (command line).

That way I could still benefit from the templates while also giving the user a nice gui for setting everything up.