// MAX 7219 flame test

// MAX7219 bargraph display

// Select left or right insertion
// Lowest value LED blinks when the value is zero
// Select column height from one to eight LEDs
// Select row width from one to eight LEDs
//
// ⃝⃝⃝⃝⃝⃝⃝⃝ 0
// ⃝⃝⃝⃝⃝⃝⃝⃝ 1    Matrix LED identification
// ⃝⃝⃝⃝⃝⃝⃝⃝ 2
// ⃝⃝⃝⃝⃝⃝⃝⃝ 3 Rows
// ⃝⃝⃝⃝⃝⃝⃝⃝ 4
// ⃝⃝⃝⃝⃝⃝⃝⃝ 5
// ⃝⃝⃝⃝⃝⃝⃝⃝ 6
// ⃝⃝⃝⃝⃝⃝⃝⃝ 7
// 76543210
// Columns

#include <LedControl.h>

#define F_CPU 1600000L

#define CS_PIN  10
#define CLK_PIN 13
#define DIN_PIN 11

#define MAX_SEG 1


#include <LibPrintf.h>

uint8_t flameOut, flameBuild;
byte i, j;

// Set up the matrix control pins and maximum number of segments
LedControl matrixLEDDisplay = LedControl(DIN_PIN, CLK_PIN, CS_PIN, MAX_SEG); // MAX7219


void setup() {
  Serial.begin(115200);
  randomSeed(13);
  matrixLEDDisplay.shutdown(0, false);
  matrixLEDDisplay.setIntensity(0, 7);
  matrixLEDDisplay.clearDisplay(0);
}

void loop() {
  uint8_t matrix[8];
  memset(matrix, 0x00, 8); // reset all the matrix bits

  for (j = 0; j < 8; j++) {
    flameBuild = 0x0;
    long pixelOn;
    // loop to turn on pixels
    for (byte i = 0; i < j; i++) {
      pixelOn =  random(0, 8);
      flameBuild = bitSet(flameBuild,  pixelOn);
      // if j=7 givee bottom row another chance
      if (j == 7) {
        pixelOn =  random(0, 8);
        flameBuild = bitSet(flameBuild, (byte) pixelOn);
      }
      //matrix[i] = flameBuild;
    }
    matrix[j] = flameBuild;
  }

  for (uint8_t i = 0; i < 8; i++) {
    printf("%i\t%08b\n", i, matrix[i]); // print with formatting
  }
  printf("\n\n");

  for(uint8_t i=0;i<8;i++){
    matrixLEDDisplay.setRow(0,i,matrix[i]);
  }
  delay(170);

}