Arduino波发生器

我需要创建一个Arduino波形发生器,但我真的无法让它正常工作。

发电机必须输出正弦波、方波、三角波和锯齿波,我让方波正常工作,我尝试了很多方法,但无法让其他方法正常工作。

这是我的电路:

这是我使用的代码

int led1 = 3;
int led2 = 4;
int led3 = 5;
int led4 = 6;
int display = 13;

int inBtn = 8;
int btnSt = 0;
int btnLastSt = 0;

int cont = 0;

void setup() {

  pinMode(led1, OUTPUT);
  pinMode(led2, OUTPUT);
  pinMode(led3, OUTPUT);
  pinMode(led4, OUTPUT);
  pinMode(display, OUTPUT);

  pinMode(inBtn, INPUT);

}

void loop() {
  digitalWrite(led1, LOW);
  digitalWrite(led2, LOW);
  digitalWrite(led3, LOW);
  digitalWrite(led4, LOW);
  switch(cont){
      case 0:
            digitalWrite(led1, HIGH);    
            digitalWrite(display, HIGH);
            delay(250);
            digitalWrite(display, LOW);
            delay(250);
            break;
      case 1:
            digitalWrite(led2, HIGH);
            break;
      case 2:
            digitalWrite(led3, HIGH);
            break;
      case 3:
            digitalWrite(led4, HIGH);
            break;
  }  
  if (digitalRead(inBtn) == LOW) {
    cont++;
    delay(150);
  }
  if (cont == 4) cont = 0;

  if (btnLastSt != cont){
    btnLastSt = cont;
  }

}

其他波将进入其他“案例”中。 我很抱歉缺乏信息和研究,但现在我非常绝望(这是一项任务)。

如果有人能在这方面帮我一点忙,那就太好了。

使现代化

在格哈德的帮助下,这是我最后的电路和代码。

int led1 = 3;
int led2 = 4;
int led3 = 5;
int led4 = 6;
int display = 11;

int inBtn = 8;
int btnSt = 0;
int btnLastSt = 0;

int cont = 0;

void setup() {

  pinMode(led1, OUTPUT);
  pinMode(led2, OUTPUT);
  pinMode(led3, OUTPUT);
  pinMode(led4, OUTPUT);
  pinMode(display, OUTPUT);

  pinMode(inBtn, INPUT);

}

void loop() {
  digitalWrite(led1, LOW);
  digitalWrite(led2, LOW);
  digitalWrite(led3, LOW);
  digitalWrite(led4, LOW);
  switch(cont){
      case 0:
            //Square
            digitalWrite(led1, HIGH);    
            digitalWrite(display, HIGH);
            delay(200);
            digitalWrite(display, LOW);
            delay(200);
            break;
      case 1:
            //Sawtooth
            digitalWrite(led2, HIGH);
            for(int i = 0; i < 255; i++){
                analogWrite(display, i);
                delay(1);   
            }
            analogWrite(display, 0);
            delay(1);
            break;
    case 2:
            //Triangular
            digitalWrite(led3, HIGH);
            for (int i = 0; i < 254; i++){
                analogWrite(display, i);
                delay(1);
            }
            for (int i2 = 254; i2 > 0; i2--){
                analogWrite(display, i2);
                delay(1); 
            }

           break;
      case 3:
            //Sine
            digitalWrite(led4, HIGH);
            analogWrite(display, 10); delay(10);
            analogWrite(display, 19); delay(10);
            analogWrite(display, 45); delay(10);
            analogWrite(display, 84); delay(10);
            analogWrite(display, 130); delay(10);
            analogWrite(display, 176); delay(10);
            analogWrite(display, 215); delay(10);
            analogWrite(display, 241); delay(10);
            analogWrite(display, 250); delay(10);
            analogWrite(display, 241); delay(10);
            analogWrite(display, 215); delay(10);
            analogWrite(display, 176); delay(10);
            analogWrite(display, 130); delay(10);
            analogWrite(display, 84); delay(10);
            analogWrite(display, 45); delay(10);
            analogWrite(display, 19); delay(10);
            break;
  }  
  if (digitalRead(inBtn) == LOW) {
    cont++;
    delay(100);
  }
  if (cont == 4) cont = 0;

  if (btnLastSt != cont){
    btnLastSt = cont;
  }

}

虽然不完美,但已经足够好了哈哈。