slave_receive

slave_receive_byte.cpp

byte received[8][8]; //build an empty array to store the byte received from master
void setup() {
  Serial.begin(57600);
  Serial.println("test");

  Wire.begin(0x09);
  Wire.onReceive(receiveEvent);// this function will be triggered whenever something received
}

void loop()
{
  received[3][2] = fromMaster; // just use [3][2] this location to test if i get the correct thing
  for (byte x = 0; x < 8; x++)
  {
    for (byte y = 0; y < 8; y++)
    {
      PixelRGB *p = Colorduino.GetPixel(x, y);
      p->r = received[x][y];
    }
  }
  Colorduino.FlipPage();
}

byte fromMaster;
void receiveEvent(int howMany) 
{
  while (1 < Wire.available()) { // loop through all but the last
    char x = Wire.read(); // receive byte as a character
    Serial.print(x);// print the character
  }
  fromMaster = Wire.read();    // receive byte as an integer
  Serial.println(fromMaster); 
}