유수봉 교수의 APP-07

https://blog.naver.com/newbongman/223247111419

... 교수의 APP-07 : 시리얼 통신

 

 

// C++ code
//
void setup() {
  Serial.begin(9600);
  Serial.print("\n (Choi Dong Hun) Serial Comm. \n\n ");
}
void loop() {
  int N = 0;
  for (N = 1; N < 10; N++) {
    Serial.print(N);
    Serial.println(" - Long live ChoiDongHun !!");
  }
  for (N = 1; N < 10; N++) {
    Serial.print(" -> ");
    delay(500);
  }
  Serial.println();
}

Long live ChoiDongHun 9번 출력되고 화살표 10번 출력한 다음 다시 반복되는 코드

 

 

---

void setup() {
  Serial.begin(9600);
  for (int P = 2; P < 7; P++) {
    pinMode(P, OUTPUT);
  }
  Serial.print("\n (NewBongMan) Serial to LED\n\n ");
}

void loop() {

  char X = Serial.read();
  if ((X >= '0') && (X <= '9')) { 
    Serial.println(X); 
    }
  if (X == '2') { digitalWrite(2, HIGH); }
  if (X == '3') { digitalWrite(3, HIGH); }
  if (X == '4') { digitalWrite(4, HIGH); }
  if (X == '5') { digitalWrite(5, HIGH); }
  if (X == '6') { digitalWrite(6, HIGH); }

  if (X == '0') {
    for (int P = 2; P < 7; P++) {
      digitalWrite(P, LOW);
    }
  }
}

시리얼 모니터에 2,3,4,5,6 입력하면 숫자별로 정해진 LED의 불빛이 켜지고 0을 입력하면 모두 꺼진다.

 

https://www.youtube.com/watch?v=LMx1wvBVqoA

 

---

// C++ code
//
void setup() {
  Serial.begin(9600);
  for (int P = 2; P < 9; P++) {
    pinMode(P, OUTPUT);
  }
  Serial.print("\n (NewBongMan) Serial to FND\n\n ");
}

void loop() {
  char X = Serial.read();  // Serial 통신은 문자
  if ((X >= '0') && (X <= '9')) {
    Serial.print(" Input Number : ");
    Serial.println(X);
    disp(X - 48);  // 문자를 숫자로
  }
}

void CLS() {  // FND 지우기
  for (int X = 2; X < 9; X++) { digitalWrite(X, HIGH); }
}

void disp(int N) {  // FND 에 숫자 표시
  CLS();
  switch (N) {
    case 1:      digitalWrite(3, LOW);      digitalWrite(4, LOW);      break;
    case 2:      digitalWrite(2, LOW);      digitalWrite(3, LOW);      digitalWrite(5, LOW);      digitalWrite(6, LOW);      digitalWrite(8, LOW);      break;
    case 3:      digitalWrite(2, LOW);      digitalWrite(3, LOW);      digitalWrite(4, LOW);      digitalWrite(5, LOW);      digitalWrite(8, LOW);      break;
    case 4:      digitalWrite(3, LOW);      digitalWrite(4, LOW);      digitalWrite(7, LOW);      digitalWrite(8, LOW);      break;
    case 5:      digitalWrite(2, LOW);      digitalWrite(4, LOW);      digitalWrite(5, LOW);      digitalWrite(7, LOW);      digitalWrite(8, LOW);      break;
    case 6:      digitalWrite(2, LOW);      digitalWrite(4, LOW);      digitalWrite(5, LOW);      digitalWrite(6, LOW);      digitalWrite(7, LOW);      digitalWrite(8, LOW);      break;
    case 7:      digitalWrite(2, LOW);      digitalWrite(3, LOW);      digitalWrite(4, LOW);      break;
    case 8:      digitalWrite(2, LOW);      digitalWrite(3, LOW);      digitalWrite(4, LOW);      digitalWrite(5, LOW);      digitalWrite(6, LOW);      digitalWrite(7, LOW);      digitalWrite(8, LOW);      break;
    case 9:      digitalWrite(2, LOW);      digitalWrite(3, LOW);      digitalWrite(4, LOW);      digitalWrite(5, LOW);      digitalWrite(7, LOW);      digitalWrite(8, LOW);      break;
    case 0:      digitalWrite(2, LOW);      digitalWrite(3, LOW);      digitalWrite(4, LOW);      digitalWrite(5, LOW);      digitalWrite(6, LOW);      digitalWrite(7, LOW);      break;
  }
}

시리얼 모니터에 입력한 숫자대로 7세그먼트에 출력된다.

 

---

 

void setup() {
  Serial.begin(9600);
  Serial.print("\n (Choi Dong Hun) Serial Comm. \n\n ");
}
void loop() {
  int N = 0;
  String name = "ChoiDongHun";
  
  for (N = name.length(); N >=0; N--) 
  {
    Serial.print(name[N]);
  }
  Serial.println();
  for (N = 1; N < 10; N++) {
    Serial.print(" -> ");
    delay(500);
  }
  Serial.println();
}

이름 거꾸로 출력하기