How to Control LED matrixes

Kernel
1

temych02 wrote on Sunday, August 19, 2018:

I’m trying to controll multiple LED matrixes WS2812B using FastLED and FreeRTOS library on arduino nano(ATmega328).
In case i run multiple tasks with a special one for LED matrix, then it works well. But if i add another one ("TaskLEDRainbow2), everything goes into the hell. It successfuly uploads on the board, but istead of showing the effect the built-in LED(pin13) starts blasting as crazy and nothing works at total. What’s wrong with it?
What mistake did i made?

Here’s the sketch i try to upload:

#include <Arduino_FreeRTOS.h>
#include <FastLED.h>
#define NUM_LEDS 64   // using x2 matrixes ws2812b size: 8x8
#define DATA_PIN_1 6  // each matrix has its' own pin
#define DATA_PIN_2 3

CRGB leds[NUM_LEDS];
CRGB leds2[NUM_LEDS];

byte counter;
byte counter2;


void TaskBlink( void *pvParameters );
void TaskLEDRainbow( void *pvParameters );
void TaskLEDRainbow2( void *pvParameters );

void setup() {
 
  
  Serial.begin(9600);
  
  while (!Serial) {
    ; 
  }

  xTaskCreate(
    TaskBlink
    ,  (const portCHAR *)"Blink"
    ,  128  // Stack size
    ,  NULL
    ,  2  // Priority
    ,  NULL );


    xTaskCreate(
    TaskLEDRainbow
    ,  (const portCHAR *) "f2"
    ,  512  // Stack size
    ,  NULL
    ,  1  // Priority
    ,  NULL );

    
    xTaskCreate(
    TaskLEDRainbow2
    ,  (const portCHAR *) "f3"
    ,  512  // Stack size
    ,  NULL
    ,  1  // Priority
    ,  NULL );
}

void loop()
{

}


void TaskBlink(void *pvParameters)  // 1st load task just for test
{
  (void) pvParameters;

  // initialize digital LED_BUILTIN on pin 13 as an output.
  pinMode(LED_BUILTIN, OUTPUT);

  for (;;)
  {
    digitalWrite(LED_BUILTIN, HIGH);   // turn the LED on (HIGH is the voltage level)
    vTaskDelay( 1000 / portTICK_PERIOD_MS );
    digitalWrite(LED_BUILTIN, LOW);    // turn the LED off by making the voltage LOW
    vTaskDelay( 1000 / portTICK_PERIOD_MS );
  }
}


void TaskLEDRainbow(void *pvParameters)   // Task for the 1st matrix
{
  (void) pvParameters;
  FastLED.addLeds<WS2811, DATA_PIN_1, GRB>(leds, NUM_LEDS).setCorrection( TypicalLEDStrip );
  FastLED.setBrightness(5);
  pinMode(DATA_PIN_1, OUTPUT);
  for(;;){
    for (int i = 0; i < NUM_LEDS; i++ ) {       
      leds[i] = CHSV(counter + i * 2, 255, 255);
      }
    counter++;        // counter changes from0 to 255 (data type - bytes)
    FastLED.show();
    vTaskDelay(1000 / portTICK_PERIOD_MS);         // speed of the effect
    }
}

void TaskLEDRainbow2(void *pvParameters)    // Same as the "TaskLEDRainbow()"
{
  (void) pvParameters;
  FastLED.addLeds<WS2811, DATA_PIN_2, GRB>(leds2, NUM_LEDS).setCorrection( TypicalLEDStrip );
  FastLED.setBrightness(5);
  pinMode(DATA_PIN_2, OUTPUT);

  for(;;){
    for (int i = 0; i < NUM_LEDS; i++ ) {       
      leds2[i] = CHSV(counter + i * 2, 255, 255);
      }
    counter2++;   
    FastLED.show();
    vTaskDelay(5000 / portTICK_PERIOD_MS);         
    }
}

Thanks for your replies!

2

richarddamon wrote on Sunday, August 19, 2018:

One big question is ‘FastLED’ thread safe, and is it designed to be able to handle two different sets of leds at once. This is really a question for some forum that knows that library.