newone.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 10 //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;

 volatile xSemaphoreHandle diplay_sem = NULL;
volatile xSemaphoreHandle transfer_sem = NULL;

bool sd_card_present=false;


static void displayframe(void *pvParameters)
{
  for(;;)
  {
    xSemaphoreTake(diplay_sem, portMAX_DELAY); 
     FastLED.show();
      xSemaphoreGive(transfer_sem); 
  }
}




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);
}


void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  //strip init 
  stripsConfig();
//queue init
diplay_sem = xSemaphoreCreateBinary();
transfer_sem  = xSemaphoreCreateBinary();
//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("/video1.txt"); //to change with your filename
    if (myFile) Serial.println("FILE_OK");

xSemaphoreGive(transfer_sem); 
}


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
              {
                xSemaphoreTake(transfer_sem, portMAX_DELAY); 
                memcpy(leds,buffer,NUM_LEDS*3);
                xSemaphoreGive(diplay_sem); 
              }
    }
}