Using I2S event queue or Task queue for passing adc values from buffer.

[zekageri]

I can not find any reliable solution for the implementation of the I2S event queues on the Arduino framework.
Currently i'am measuring a 4khz signal from a signal generator with the I2S adc via dma.
The data goes into a buffer on a task and i read that buffer from an other task.
The problem is that i think some data get lost because the other task reads the data from the buffer even when the reader does not finished.

My code right now:

Code: Select all

static void loop0(void * pvParameters){
  for( ;; ){    
        Sampling();                               // RETRIVE DATA FROM DMA BUFFER
  }
}

static const inline void To_the_Stars(){
  if(millis() - Start_Millis >= 1000){
    Start_Millis = millis();
    for(int i = 0;i<NUM_SAMPLES;i++){
      Send_Data_to_Plot(i2s_read_buff[i]); // RETRIVE DATA FROM i2s_read_buff FOR CALCULATION AND VISUALIZATION
    }
  }
}

I'am sampling with 144444hz right now, and the readed data looks like this on the web: