#include <LedControl.h>

// Pin definitions for MAX7219
const int DIN_PIN = 11;  // Data In (MOSI)
const int CS_PIN = 10;   // Chip Select
const int CLK_PIN = 13;  // Clock (SCK)

// Number of MAX7219 units
const int NUM_DEVICES = 1;

// Create a LedControl instance
LedControl lc = LedControl(DIN_PIN, CLK_PIN, CS_PIN, NUM_DEVICES);

void setup() {
  // Initialize the MAX7219
  for (int device = 0; device < NUM_DEVICES; device++) {
    lc.shutdown(device, false);  // Wake up the MAX7219 from power-saving mode
    lc.setIntensity(device, 8);  // Set brightness level (0 is min, 15 is max)
    lc.clearDisplay(device);     // Clear the display
  }
}

void loop() {
  // Move a column from left to right across all devices
  moveColumnLeftToRight();
  delay(1); // Pause before moving to row display

  // Clear the display
  clearAllDisplays();
  delay(1); // Short pause

  // Move a row from top to bottom across all devices
  moveRowLeftToRight();
  delay(1); // Pause before looping again

  // Clear the display
  clearAllDisplays();
  delay(1); // Short pause
}

// Function to move a column from left to right across all devices
void moveColumnLeftToRight() {
  for (int col = 0; col < 8; col++) {
    for (int device = 0; device < NUM_DEVICES; device++) {
      lc.setColumn(device, col, B11111111);  // Set the entire column on
      delay(200);  // Delay between movements
      lc.setColumn(device, col, B00000000);  // Clear the column
    }
  }
}

// Function to move a row from top to bottom across all devices
void moveRowLeftToRight() {
  for (int row = 0; row < 8; row++) {
    for (int device = 0; device < NUM_DEVICES; device++) {
      lc.setRow(device, row, B11111111);  // Set the entire row on
      delay(200);  // Delay between movements
      lc.setRow(device, row, B00000000);  // Clear the row
    }
  }
}

// Function to clear all displays
void clearAllDisplays() {
  for (int device = 0; device < NUM_DEVICES; device++) {
    lc.clearDisplay(device);
  }
}