/*
  Matrix as a 64-bit long integer
  State of the 8x8 matrix can be presented as an unsigned long integer (uint64_t).
  In this case the code is pretty compact. Like this code for Arduino:

  翻譯:
  64 位長整數矩陣
  8x8 矩陣的狀態可以表示為無符號長整數 (uint64_t)。
  在這種情況下，程式碼非常緊湊。 就像 Arduino 的程式碼一樣：

  網址:https://xantorohara.github.io/led-matrix-editor/#
*/
#include <LedControl.h>

const int DIN_PIN = 7;
const int CS_PIN = 6;
const int CLK_PIN = 5;

const uint64_t IMAGES[] = {
  0xff000001010000ff, 0xff000003030000ff, 0xff000006060000ff,
  0xff00000c0c0000ff, 0xff000018180000ff, 0xff000030300000ff,
  0xff000060600000ff, 0xff0000c0c00000ff, 0xff000080800000ff,
  0xff0000c0c00000ff, 0xff000060600000ff, 0xff000018180000ff,
  0xff00000c0c0000ff, 0xff000006060000ff, 0xff000003030000ff,
  0xff000001010000ff
};
const int IMAGES_LEN = sizeof(IMAGES) / 8;


LedControl display = LedControl(DIN_PIN, CLK_PIN, CS_PIN);


void setup() {
  display.clearDisplay(0);
  display.shutdown(0, false);
  display.setIntensity(0, 10);
}

void displayImage(uint64_t image) {
  for (int i = 0; i < 8; i++) {
    byte row = (image >> i * 8) & 0xFF;
    for (int j = 0; j < 8; j++) {
      display.setLed(0, i, j, bitRead(row, j));
    }
  }
}

int i = 0;

void loop() {
  displayImage(IMAGES[i]);
  if (++i >= IMAGES_LEN ) {
    i = 0;
  }
  delay(100);
}