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/*
 * Arduino 由 XBee 接收資料。輸入不同字元會亮不同數字，
 * pin0、pin1    = XBee
 * pin2～pin12   = LED matrix display   
 * pin13         = Relay switch          = button 0 開；p 關。
 * History:
 *   2010-02-06 0.0 初版
 */

#define lpinA 2             // 定義 74138 A 腳位
#define lpinB 3             // 定義 74138 B 腳位
#define lpinC 4             // 定義 74138 C 腳位
#define hpin0 5             // 定義 LED 正極腳位
#define hpin1 6             // 定義 LED 正極腳位
#define hpin2 7            // 定義 LED 正極腳位
#define hpin3 8            // 定義 LED 正極腳位
#define hpin4 9            // 定義 LED 正極腳位
#define hpin5 10            // 定義 LED 正極腳位
#define hpin6 11            // 定義 LED 正極腳位
#define hpin7 12            // 定義 LED 正極腳位
#define pin_relay 13        // 定義控制 relay 的 pin
#define row_size 8          // 定義 Matrix row 大小
#define col_size 8          // 定義 Matrix colum 小
#define delay_time 100      // 延遲時間

#define data_default {0, 0, 0, 0, 0, 0, 0, 0,\
                      0, 0, 0, 0, 0, 0, 0, 0,\
                      0, 0, 0, 0, 0, 0, 0, 0,\
                      0, 0, 0, 0, 0, 0, 0, 0,\
                      0, 0, 0, 0, 0, 0, 0, 0,\
                      0, 0, 0, 0, 0, 0, 0, 0,\
                      0, 0, 0, 0, 0, 0, 0, 0,\
                      0, 0, 0, 0, 0, 0, 0, 0}
                      
#define data_A {0, 0, 0, 1, 1, 0, 0, 0,\
                0, 0, 1, 0, 0, 1, 0, 0,\
                0, 0, 1, 0, 0, 1, 0, 0,\
                0, 1, 0, 0, 0, 0, 1, 0,\
                0, 1, 1, 1, 1, 1, 1, 0,\
                0, 1, 0, 0, 0, 0, 1, 0,\
                0, 1, 0, 0, 0, 0, 1, 0,\
                0, 1, 0, 0, 0, 0, 1, 0}

#define data_N {0, 1, 0, 0, 0, 0, 1, 0,\
                0, 1, 1, 0, 0, 0, 1, 0,\
                0, 1, 1, 0, 0, 0, 1, 0,\
                0, 1, 0, 1, 0, 0, 1, 0,\
                0, 1, 0, 0, 1, 0, 1, 0,\
                0, 1, 0, 0, 0, 1, 1, 0,\
                0, 1, 0, 0, 0, 1, 1, 0,\
                0, 1, 0, 0, 0, 0, 1, 0}
                
#define data_relayon {1, 1, 1, 0, 0, 1, 0, 0,\
                      1, 0, 1, 0, 0, 1, 0, 0,\
                      1, 1, 0, 0, 0, 1, 0, 0,\
                      1, 0, 1, 0, 0, 1, 1, 1,\
                      0, 1, 1, 0, 1, 0, 0, 1,\
                      1, 0, 0, 1, 1, 1, 0, 1,\
                      1, 0, 0, 1, 1, 0, 1, 1,\
                      0, 1, 1, 0, 1, 0, 0, 1}
                      
#define data_relayoff {1, 1, 1, 0, 0, 1, 0, 0,\
                       1, 0, 1, 0, 0, 1, 0, 0,\
                       1, 1, 0, 0, 0, 1, 0, 0,\
                       1, 0, 1, 0, 0, 1, 1, 1,\
                       0, 1, 1, 0, 1, 1, 1, 1,\
                       1, 0, 0, 1, 1, 1, 1, 1,\
                       1, 0, 0, 1, 1, 0, 1, 0,\
                       0, 1, 1, 0, 1, 0, 1, 0}                     

// 所有要顯示字的 array
boolean word_array[4][row_size][col_size] = {data_A, data_N, data_relayon, data_relayoff};
 // LED Matrix
boolean led[row_size][col_size] ;
// 水平方向 led
byte row_pin[col_size]={hpin0, hpin1, hpin2, hpin3, hpin4, hpin5, hpin6, hpin7};


int serial_data = 0;    // 由 serial 讀入的資料
 
void setup()
{
  pinMode(2, OUTPUT);
  pinMode(3, OUTPUT);
  pinMode(4, OUTPUT);
  pinMode(5, OUTPUT);
  pinMode(6, OUTPUT);
  pinMode(7, OUTPUT);
  pinMode(8, OUTPUT);
  pinMode(9, OUTPUT);
  pinMode(10, OUTPUT);
  pinMode(11, OUTPUT);
  pinMode(12, OUTPUT);
  pinMode(13, OUTPUT);
  clear_led();
  Serial.begin(9600);
}

void loop()
{
  clear_led();
  //Serial.print("debug : serial_data =   ");
  //Serial.println(serial_data);
  //delay(500);
  if (Serial.available() > 0)
  {
    serial_data = Serial.read();
    Serial.print("I receive: ");
    Serial.println(serial_data);
  }
  switch (serial_data)
  {
    case 0:
      //default serial_data value received nothing, do nothing
      break;
    case 48: // key 0
      digitalWrite(pin_relay, HIGH);
      word_to_led(2);
      display_led(led, 500);
      break;
      break;
    case 49: // key 1
      word_to_led(0);
      display_led(led, 500);
      break;
    case 50: // key 2
      word_to_led(1);
      display_led(led, 500);
      break;
    case 112: // key 
      digitalWrite(pin_relay, LOW);
      word_to_led(3);
      display_led(led, 500);
      break;
      break;
    default:
      Serial.println("key is not defined");
      delay(delay_time);
  }
}

void clear_led()
{
  // serial_data = 0;
  for (int i = 0; i < col_size; i++)
    digitalWrite(row_pin[i], LOW);
}

void display_led(byte led[row_size][col_size], int continue_time)
{
  for (int k = 0; k < continue_time; k++)
  {
    for (int i = 0; i < col_size; i++)
    {
      // 掃描第一個 col
      low_74138pin(i);
      for (int j = 0; j < row_size; j++)
      {
        if (led[j][i] == 1)
        {
          digitalWrite(row_pin[j], HIGH);
          //delay(delay_time);
        }
      }
      clear_led();
    }
  }
}

void low_74138pin(int num)
{
  switch (num)
  {
    case 0:
      digitalWrite(lpinA, LOW);
      digitalWrite(lpinB, LOW);
      digitalWrite(lpinC, LOW);
      break;
    case 1:
      digitalWrite(lpinA, HIGH);
      digitalWrite(lpinB, LOW);
      digitalWrite(lpinC, LOW);
      break;
    case 2:
      digitalWrite(lpinA, LOW);
      digitalWrite(lpinB, HIGH);
      digitalWrite(lpinC, LOW);
      break;
    case 3:
      digitalWrite(lpinA, HIGH);
      digitalWrite(lpinB, HIGH);
      digitalWrite(lpinC, LOW);
      break;
    case 4:
      digitalWrite(lpinA, LOW);
      digitalWrite(lpinB, LOW);
      digitalWrite(lpinC, HIGH);
      break;
    case 5:
      digitalWrite(lpinA, HIGH);
      digitalWrite(lpinB, LOW);
      digitalWrite(lpinC, HIGH);
      break;
    case 6:
      digitalWrite(lpinA, LOW);
      digitalWrite(lpinB, HIGH);
      digitalWrite(lpinC, HIGH);
      break;
    case 7:
      digitalWrite(lpinA, HIGH);
      digitalWrite(lpinB, HIGH);
      digitalWrite(lpinC, HIGH);
  }
}

// 將第 n 個 word 讀入 led
void word_to_led(int n){
  for (int i = 0; i < row_size; i++)
    for (int j = 0; j < col_size; j++)
      led[i][j] = word_array[n][i][j];
}