7세그먼트 디코더

#define A_IN 2

#define B_IN 3

#define C_IN 4

#define D_IN 5

#define a_OUT 7

#define b_OUT 8

#define c_OUT 9

#define d_OUT 10

#define e_OUT 11

#define f_OUT 12

#define g_OUT 13

#define delay_time 1

void setup() {

 pinMode(A_IN, INPUT_PULLUP);

 pinMode(B_IN, INPUT_PULLUP);

 pinMode(C_IN, INPUT_PULLUP);

 pinMode(D_IN, INPUT_PULLUP);

 pinMode(a_OUT, OUTPUT);

 pinMode(b_OUT, OUTPUT);

 pinMode(c_OUT, OUTPUT);

 pinMode(d_OUT, OUTPUT);

 pinMode(e_OUT, OUTPUT);

 pinMode(f_OUT, OUTPUT);

 pinMode(g_OUT, OUTPUT);

}

void loop() {

   int A = !digitalRead(A_IN);

   int B = !digitalRead(B_IN);

   int C = !digitalRead(C_IN);

   int D = !digitalRead(D_IN);

   int a = (!D&&!C&&!B&&A)||(C&&!A);

   int b = (C&&!B&&A)||(C&&B&&!A);

   int c = !C&&B&&!A;

   int d = (!C&&!B&&A)||(C&&!B&&!A)||(C&&B&&A);

   int e = (A)||(C&&!B);

   int f = (B&&A)||(!C&&B)||(!D&&!C&&A);

   int g = (!D&&!C&&!B)||(C&&B&&A);

if (!a == HIGH) {

   digitalWrite(a_OUT, HIGH);

   delay(delay_time);

   digitalWrite(a_OUT, LOW);

}

if (!b == HIGH) {

   digitalWrite(b_OUT, HIGH);

   delay(delay_time);

   digitalWrite(b_OUT, LOW);

}

if (!c == HIGH) {

   digitalWrite(c_OUT, HIGH);

   delay(delay_time);

   digitalWrite(c_OUT, LOW);

}

if (!d == HIGH) {

   digitalWrite(d_OUT, HIGH);

   delay(delay_time);

   digitalWrite(d_OUT, LOW);

}

if (!e == HIGH) {

   digitalWrite(e_OUT, HIGH);

   delay(delay_time);

   digitalWrite(e_OUT, LOW);

}

if (!f == HIGH) {

   digitalWrite(f_OUT, HIGH);

   delay(delay_time);

   digitalWrite(f_OUT, LOW);

}      

if (!g == HIGH) {

   digitalWrite(g_OUT, HIGH);

   delay(delay_time);

   digitalWrite(g_OUT, LOW);

}   

}