dynamic

dynamic_7seg

#include <MsTimer2.h>

int led_a = 13;
int led_b = 12;
int led_c = 11;
int led_d = 10;
int led_e = 9;
int led_f = 8;
int led_g = 7;
int led_dp = 6;
int led_sel4 = 5;
int led_sel3 = 4;
int led_sel2 = 3;
int led_sel1 = 2;
  
int number;

void setup() {                
  pinMode(led_a, OUTPUT);
  pinMode(led_b, OUTPUT);  
  pinMode(led_c, OUTPUT);
  pinMode(led_d, OUTPUT);
  pinMode(led_e, OUTPUT);
  pinMode(led_f, OUTPUT);
  pinMode(led_g, OUTPUT);
  pinMode(led_dp, OUTPUT);
  pinMode(led_sel3, OUTPUT);
  pinMode(led_sel2, OUTPUT);
  pinMode(led_sel1, OUTPUT);
  randomSeed(analogRead(0)); // 未接続ピンのノイズを利用
  
  number = random(99);
  digitalWrite(led_sel3, LOW);
  digitalWrite(led_sel2, LOW);
  digitalWrite(led_sel1, LOW);
  
  MsTimer2::set(100, update); // 500msごとにオンオフ
  MsTimer2::start();
}
void update(){
 randomSeed(analogRead(0)); // 未接続ピンのノイズを利用
 number = random(100); 
}

// the loop routine runs over and over again forever:
void loop() {
//  if(number > 9) number = 0;
  digitalWrite(led_sel2, HIGH);
  lightLED(number/10);
  delay(10);
  digitalWrite(led_sel2, LOW);
  digitalWrite(led_sel1, HIGH);
  lightLED(number%10);
  delay(10);
  digitalWrite(led_sel1, LOW);
}

void lightLED(int num){
  switch(num){
    case 1:
    digitalWrite(led_a, HIGH);
    digitalWrite(led_b, LOW);
    digitalWrite(led_c, LOW);
    digitalWrite(led_d, HIGH);
    digitalWrite(led_e, HIGH);
    digitalWrite(led_f, HIGH);
    digitalWrite(led_g, HIGH);
    digitalWrite(led_dp, HIGH);
    break;
    case 2:
    digitalWrite(led_a, LOW);
    digitalWrite(led_b, LOW);
    digitalWrite(led_c, HIGH);
    digitalWrite(led_d, LOW);
    digitalWrite(led_e, LOW);
    digitalWrite(led_f, HIGH);
    digitalWrite(led_g, LOW);
    digitalWrite(led_dp, HIGH);
    break;
    case 3:
    digitalWrite(led_a, LOW);
    digitalWrite(led_b, LOW);
    digitalWrite(led_c, LOW);
    digitalWrite(led_d, LOW);
    digitalWrite(led_e, HIGH);
    digitalWrite(led_f, HIGH);
    digitalWrite(led_g, LOW);
    digitalWrite(led_dp, HIGH);
    break;
    case 4:
    digitalWrite(led_a, HIGH);
    digitalWrite(led_b, LOW);
    digitalWrite(led_c, LOW);
    digitalWrite(led_d, HIGH);
    digitalWrite(led_e, HIGH);
    digitalWrite(led_f, LOW);
    digitalWrite(led_g, LOW);
    digitalWrite(led_dp, HIGH);
    break;
    case 5:
    digitalWrite(led_a, LOW);
    digitalWrite(led_b, HIGH);
    digitalWrite(led_c, LOW);
    digitalWrite(led_d, LOW);
    digitalWrite(led_e, HIGH);
    digitalWrite(led_f, LOW);
    digitalWrite(led_g, LOW);
    digitalWrite(led_dp, LOW);
    break;
    case 6:
    digitalWrite(led_a, HIGH);
    digitalWrite(led_b, HIGH);
    digitalWrite(led_c, LOW);
    digitalWrite(led_d, LOW);
    digitalWrite(led_e, LOW);
    digitalWrite(led_f, LOW);
    digitalWrite(led_g, LOW);
    digitalWrite(led_dp, HIGH);
    break;
    case 7:
    digitalWrite(led_a, LOW);
    digitalWrite(led_b, LOW);
    digitalWrite(led_c, LOW);
    digitalWrite(led_d, HIGH);
    digitalWrite(led_e, HIGH);
    digitalWrite(led_f, HIGH);
    digitalWrite(led_g, HIGH);
    digitalWrite(led_dp, LOW);
    break;
    case 8:
    digitalWrite(led_a, LOW);
    digitalWrite(led_b, LOW);
    digitalWrite(led_c, LOW);
    digitalWrite(led_d, LOW);
    digitalWrite(led_e, LOW);
    digitalWrite(led_f, LOW);
    digitalWrite(led_g, LOW);
    digitalWrite(led_dp, HIGH);

    break;
    case 9:
    digitalWrite(led_a, LOW);
    digitalWrite(led_b, LOW);
    digitalWrite(led_c, LOW);
    digitalWrite(led_d, HIGH);
    digitalWrite(led_e, HIGH);
    digitalWrite(led_f, LOW);
    digitalWrite(led_g, LOW);
    digitalWrite(led_dp, HIGH);

    break;
    case 0:
    digitalWrite(led_a, LOW);
    digitalWrite(led_b, LOW);
    digitalWrite(led_c, LOW);
    digitalWrite(led_d, LOW);
    digitalWrite(led_e, LOW);
    digitalWrite(led_f, LOW);
    digitalWrite(led_g, HIGH);
    digitalWrite(led_dp, HIGH);
    break;
    default:
    digitalWrite(led_a, LOW);
    digitalWrite(led_b, LOW);
    digitalWrite(led_c, LOW);
    digitalWrite(led_d, LOW);
    digitalWrite(led_e, LOW);
    digitalWrite(led_f, LOW);
    digitalWrite(led_g, LOW);
    digitalWrite(led_dp, LOW);
  }
}