Arduino_Lab7_extends

gistfile1.txt

// 七段顯示器製作倒數功能 (v1)
int potPin=3;
byte seven_seg_digits[10][7] = { 
 { 1,1,1,1,1,1,0 },  // = 0
 { 0,1,1,0,0,0,0 },  // = 1
 { 1,1,0,1,1,0,1 },  // = 2
 { 1,1,1,1,0,0,1 },  // = 3
 { 0,1,1,0,0,1,1 },  // = 4
 { 1,0,1,1,0,1,1 },  // = 5
 { 1,0,1,1,1,1,1 },  // = 6
 { 1,1,1,0,0,0,0 },  // = 7
 { 1,1,1,1,1,1,1 },  // = 8
 { 1,1,1,0,0,1,1 }   // = 9
};
void setup() {
  Serial.begin(9600);  
  pinMode(2, OUTPUT);  
  pinMode(3, OUTPUT);
  pinMode(4, OUTPUT);
  pinMode(5, OUTPUT);
  pinMode(6, OUTPUT);
  pinMode(7, OUTPUT);
  pinMode(8, OUTPUT);
  pinMode(9, OUTPUT);
  digitalWrite(9, 0);  // 關閉小數點
}
void sevenSegWrite(byte digit) {
 byte pin = 2;
 for (byte seg = 0; seg < 7; ++seg) {
 digitalWrite(pin, seven_seg_digits[digit][seg]);
 ++pin;
 }
}
void loop() {
  int sensorValue=analogRead(potPin);
  Serial.println(sensorValue,DEC);
  // 顯示數字 '9'
  int level=0;
  for(;sensorValue>0;level++){
  sensorValue-=114;
  }
  switch(level){
   case 0 :sevenSegWrite(0);
           break;
   case 1 :sevenSegWrite(1);
           break;
   case 2 :sevenSegWrite(2);
           break;
   case 3 :sevenSegWrite(3);
           break;
   case 4 :sevenSegWrite(4);
           break;
   case 5 :sevenSegWrite(5);
           break;      
   case 6 :sevenSegWrite(6);
           break;        
   case 7 :sevenSegWrite(7);
           break;       
   case 8:sevenSegWrite(8);
           break;   
   default:sevenSegWrite(9);
           break;   
  }
}