readfilefromsdtodisplay.ino

#include "FastLED.h"
#include "freertos/queue.h"
#include "freertos/semphr.h"

#include "SD.h"
#include "SPI.h"

#define NUM_LEDS  5184
#define LEDS_PER_PIN  (NUM_LEDS / 6)
#define QUEUE_SIZE 50

#define DELAY_FRAMES 30 //to set up the delay between frames you'll not be doing more than 36fps anyway



CRGB leds[NUM_LEDS];
CRGB buffer[NUM_LEDS];

File myFile;

//this is to indicate that a new frame is ready
static xQueueHandle _frame_queue;
static TaskHandle_t _displayFrameTaskhandle;

bool sd_card_present=false;


static void displayframe(void *pvParameters)
{
  
  CRGB *frame=NULL;
  for(;;)
  {
   if(xQueueReceive(_frame_queue, &frame, portMAX_DELAY) == pdTRUE)
   {
     memcpy(leds,frame,NUM_LEDS*sizeof(CRGB));
     FastLED.show();
   }
  }
}




void stripsConfig() {
  FastLED.addLeds<WS2812B, 12, EOrder::GRB>(leds, 0 * LEDS_PER_PIN, LEDS_PER_PIN);
  FastLED.addLeds<WS2812B, 13, EOrder::GRB>(leds, 1 * LEDS_PER_PIN, LEDS_PER_PIN);
  FastLED.addLeds<WS2812B, 16, EOrder::GRB>(leds, 2 * LEDS_PER_PIN, LEDS_PER_PIN);
  FastLED.addLeds<WS2812B, 17, EOrder::GRB>(leds, 3 * LEDS_PER_PIN, LEDS_PER_PIN);
  FastLED.addLeds<WS2812B, 18, EOrder::GRB>(leds, 4 * LEDS_PER_PIN, LEDS_PER_PIN);
  FastLED.addLeds<WS2812B, 19, EOrder::GRB>(leds, 5 * LEDS_PER_PIN, LEDS_PER_PIN);
}

bool  createQueue()
{
  _frame_queue = xQueueCreate(QUEUE_SIZE, sizeof(CRGB *));
  if(!_frame_queue){
    Serial.printf("Impossible to create the queue");
            return false;
        }
        return true;
}

void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  //strip init 
  stripsConfig();
//queue init
if(!createQueue())
    return;
//init displatyframe task on second core
 xTaskCreateUniversal(displayframe, "displayframe", 4096, NULL, 3, &_displayFrameTaskhandle, 0);
  

  //init SD card
    if(!SD.begin()){
          Serial.println("Card Mount Failed");
          sd_card_present=false;
      }
      else
      {
          uint8_t cardType = SD.cardType();
          if(cardType == CARD_NONE){
              Serial.println("No SD card attached");
              sd_card_present=false;
          }
          else
          {
              sd_card_present=true;
          }
      }

      //open the file
    myFile=SD.open("/filename"); //to change with your filename


}


bool readNextFrame(File sdfile)
{
   if (sdfile.available() > 0)
    {
        sdfile.read((uint8_t *)buffer, NUM_LEDS*3);
        return true;
    }
    else
    {
      return false;
    }
}

void loop() {
  // put your main code here, to run repeatedly:
if(sd_card_present)
    {
      
      if (!readNextFrame(myFile))
              {
               //loop over the file
                  myFile.seek(0);
              }
              else
              {
                xQueueSend(_frame_queue, &buffer, portMAX_DELAY) ;
                vTaskDelay(DELAY_FRAMES);
              }
    }
}