#include <SPI.h>
const int CS = 53;
const int decodeMode = 9;
const int intensity = 10;
const int scanLimit = 11;
const int shutDown = 12;
const int dispTest = 15;

byte ConvertData = 0;


//const byte character[8]={ 0x00,0xfc,0x12,0x11,0x11,0x12,0xfc,0x00};
//const byte character[8]={ 0x18,0x24,0x42,0x42,0x7e,0x42,0x42,0x42};  // 'A'
const byte character[8] = { 0x00, 0x18, 0x18, 0x1c, 0x18, 0x18, 0x18, 0x7e };  // '1'
// const uint64_t IMAGES[] = {  //0~9
//   0x7e1818181c181800,
//   0x7e060c3060663c00,
//   0x3c66603860663c00,
//   0x30307e3234383000,
//   0x3c6660603e067e00,
//   0x3c66663e06663c00,
//   0x1818183030667e00,
//   0x3c66663c66663c00,
//   0x3c66607c66663c00,
//   0x3c66666e76663c00
// };
uint64_t aaa;
const uint64_t IMAGES[] = {
  0x1122334455667788,
  0x6666667e66663c00,
  0x3e66663e66663e00,
  0x3c66060606663c00,
  0x3e66666666663e00,
  0x7e06063e06067e00,
  0x0606063e06067e00,
  0x3c66760606663c00,
  0x6666667e66666600,
  0x3c18181818183c00,
  0x1c36363030307800,
  0x66361e0e1e366600,
  0x7e06060606060600,
  0xc6c6c6d6feeec600,
  0xc6c6e6f6decec600,
  0x3c66666666663c00,
  0x06063e6666663e00,
  0x603c766666663c00,
  0x66361e3e66663e00,
  0x3c66603c06663c00,
  0x18181818185a7e00,
  0x7c66666666666600,
  0x183c666666666600,
  0xc6eefed6c6c6c600,
  0xc6c66c386cc6c600,
  0x1818183c66666600,
  0x7e060c1830607e00,
  0x0000000000000000,
  0x7c667c603c000000,
  0x3e66663e06060600,
  0x3c6606663c000000,
  0x7c66667c60606000,
  0x3c067e663c000000,
  0x0c0c3e0c0c6c3800,
  0x3c607c66667c0000,
  0x6666663e06060600,
  0x3c18181800180000,
  0x1c36363030003000,
  0x66361e3666060600,
  0x1818181818181800,
  0xd6d6feeec6000000,
  0x6666667e3e000000,
  0x3c6666663c000000,
  0x06063e66663e0000,
  0xf0b03c36363c0000,
  0x060666663e000000,
  0x3e403c027c000000,
  0x1818187e18180000,
  0x7c66666666000000,
  0x183c666600000000,
  0x7cd6d6d6c6000000,
  0x663c183c66000000,
  0x3c607c6666000000,
  0x3c0c18303c000000
};
const int IMAGES_LEN = sizeof(IMAGES) / 8;



void setup() {
  Serial.begin(115200);
  Max7219_init();
}

void loop() {
  #pragma region seg : 單一資料

  for (int i = 7; i >= 0; i--) {
    byte n = (IMAGES[0] >> i * 8) & 0xFF;
    Serial.print(n, HEX);
  }
  Serial.println("");
  Serial.println("bbb");
  aaa = MSB_LSB_Interchange64bit(IMAGES[0]); //MSB change leftmost
Serial.println("ccc");
  for (int i = 7; i >= 0; i--) {
    byte n = (aaa >> i * 8) & 0xFF;
    Serial.print(n, HEX);
  }
  Serial.println();

  delay(2000000);

  //displayImage(ConvertData);
  #pragma endregion

  #pragma region seg : 顯示整個字串資料
  /*
    for(i=0;i<IMAGES_LEN;i++)
    {
      displayImage(IMAGES[i]);
      delay(1000);
    }
  */
  #pragma endregion
}

void sendCommand(byte command, byte value) {
  digitalWrite(CS, LOW);
  SPI.transfer(command);
  SPI.transfer(value);
  digitalWrite(CS, HIGH);
}

void Max7219_init() {
  SPI.begin();
  pinMode(CS, OUTPUT);
  digitalWrite(CS, HIGH);
  sendCommand(shutDown, 1);
  sendCommand(dispTest, 0);
  sendCommand(intensity, 1);
  sendCommand(scanLimit, 7);
  sendCommand(decodeMode, 0);
}

//8x8點矩陣畫面(8 byte array)
void displayImage(uint64_t data) {
  byte tmp = 0;
  for (int i = 0; i < 8; i++) {
    // tmp = (data >> i * 8) & 0xFF;
    // tmp = MSB_LSB_Interchange(tmp);  //MSB change leftmost
    sendCommand(i + 1, tmp);
  }
}

byte MSB_LSB_Interchange(byte data)  //Change the rightmost to MSB to the leftmost to MSB
{
  int a = 0;
  for (int i = 0; i < 8; i++) {
    bitWrite(a, i, bitRead(data, 7 - i));
  }
  return a;
}

uint64_t MSB_LSB_Interchange64bit(uint64_t data)  //Change the rightmost to MSB to the leftmost to MSB
{
  byte a = 0;
  byte tmp = 0;
  uint64_t newdata = 0;
  for (int i = 0; i < 8; i++) {
    tmp = (data >> i * 8) & 0xFF;
    for (int j = 0; j < 8; j++) {
      bitWrite(a, j, bitRead(tmp, 7 - j));
    }    
    Serial.println(a,HEX);
    newdata = newdata  | ((uint64_t)a << i * 8) ;    
  }
  return newdata;
}