NCTU_Embedded system_Arduino_Lab02

gistfile1.txt

//NCTU_Embedded system_Arduino_Lab02
//Read and compare sensor 
//then display on 5*7 LED matrix
//show the "HelloWorld" and shift left or right by the comparison
//display like this project:http://musicdiver.com/wordpress/2013/01/arduino-scrolling-text-on-5x7-led/

int scan=0;
int matrix[7][50];

//transform letter to 5*7 LED matrixs
int H[7][5]={
  {0,0,0,0,0},

  {0,1,0,1,0},

  {0,1,0,1,0},

  {0,1,1,1,0},

  {0,1,0,1,0},

  {0,1,0,1,0},

  {0,0,0,0,0}
};

int e[7][5]={
  {0,0,0,0,0},

  {0,1,1,1,0},

  {0,1,0,1,0},

  {0,1,1,1,0},

  {0,1,0,0,0},

  {0,1,1,1,0},

  {0,0,0,0,0}
};

int l[7][5]={
  {0,0,0,0,0},

  {0,1,0,0,0},

  {0,1,0,0,0},

  {0,1,0,0,0},

  {0,1,0,0,0},

  {0,1,1,0,0},

  {0,0,0,0,0}
};

int o[7][5]={
  {0,0,0,0,0},

  {0,0,0,0,0},

  {0,0,0,0,0},

  {0,1,1,1,0},

  {0,1,0,1,0},

  {0,1,1,1,0},

  {0,0,0,0,0}
};

int r[7][5]={
  {0,0,0,0,0},

  {0,0,0,0,0},

  {0,0,0,0,0},

  {0,1,0,1,0},

  {0,1,1,0,0},

  {0,1,0,0,0},

  {0,0,0,0,0}
};

int d[7][5]={
  {0,0,0,1,0},

  {0,0,0,1,0},

  {0,0,0,1,0},

  {0,0,1,1,0},

  {0,1,0,1,0},

  {0,1,1,1,0},

  {0,0,0,0,0}
};

int W[7][5]={
  {0,0,0,0,0},

  {1,0,0,0,1},

  {1,0,0,0,1},

  {1,0,1,0,1},

  {1,1,0,1,1},

  {1,0,0,0,1},

  {0,0,0,0,0}
};

//display
void display(){
    //scan from row , so at first should clean up the row
    //my case is that when set ROW to Low and Column to HIGH
    //LED turn on
    for(int k=7;k<=13;k++){
      digitalWrite(k,HIGH);
    }
   
    for(int i=0;i<7;i++){    
      //Row "turn on" one by one, control by for loop
      digitalWrite(i+7,LOW);
      //current column scan
      int cur_Col=0;
      //scan is the sceen range , in order to shift left or right
      for(int j=scan;j<scan+5;j++){
        //check whether LED should light or not 
        if(matrix[i][(j%50)]==1){
          digitalWrite(cur_Col+2,HIGH);
          delayMicroseconds(100);
        }
        //clean up column
        digitalWrite(cur_Col+2,LOW);
        delayMicroseconds(100);
        cur_Col++;
      }
      //clean up row
     digitalWrite(i+7,HIGH);
    }
}

//setup a big matrix include "Hello World"
void setMatrix(){
  for(int i=0;i<7;i++){
    for(int j=0;j<5;j++)
      matrix[i][j]=H[i][j];
  }
  
  for(int i=0;i<7;i++){
    for(int j=0;j<5;j++)
      matrix[i][j+5]=e[i][j];
  }

  for(int i=0;i<7;i++){
    for(int j=0;j<5;j++)
      matrix[i][j+10]=l[i][j];
  }

  for(int i=0;i<7;i++){
    for(int j=0;j<5;j++)
      matrix[i][j+15]=l[i][j];
  }

  for(int i=0;i<7;i++){
    for(int j=0;j<5;j++)
      matrix[i][j+20]=o[i][j];
  }

  for(int i=0;i<7;i++){
    for(int j=0;j<5;j++)
      matrix[i][j+25]=W[i][j];
  }

  for(int i=0;i<7;i++){
    for(int j=0;j<5;j++)
      matrix[i][j+30]=o[i][j];
  }

  for(int i=0;i<7;i++){
    for(int j=0;j<5;j++)
      matrix[i][j+35]=r[i][j];
  }

  for(int i=0;i<7;i++){
    for(int j=0;j<5;j++)
      matrix[i][j+40]=l[i][j];
  }

  for(int i=0;i<7;i++){
    for(int j=0;j<5;j++)
      matrix[i][j+45]=d[i][j];

  }
}


// the setup routine runs once when you press reset:

void setup() {

  // initialize serial communication at 9600 bits per second:
  Serial.begin(9600);

  for(int i=1;i<=13;i++){

    pinMode(i,OUTPUT);

  }

}

unsigned long TimerA;

// the loop routine runs over and over again forever:

void loop() {
  TimerA= millis();
  while(scan<51){
    //detect sensor value
    int sensorValue_L = analogRead(A4);
    int sensorValue_R = analogRead(A5);
    
    //letter move speed
    if(millis()-TimerA >= 300UL){
      
      //value compare and screen move direction
      if(sensorValue_L>sensorValue_R){
        scan=(--scan)%50;
        if(scan<0)scan=scan+50;
      }
      else{
        scan=(++scan)%50;
      }
      //reset timer
      TimerA= millis();
    }
    // main function
    setMatrix();
    display();
  }
}