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標題: LED燈跟蜂鳴器同時進行 [打印本頁]

作者: ray30908 時間: 2017-6-16 14:47
標題: LED燈跟蜂鳴器同時進行
我預期是用超音波感測，剛開始狀態是呼吸燈，當感應到有東西靠近時，可以撥放聲音跟led燈閃爍，但不知道為什麼一直卡再無法閃爍，但是燈有量的狀態下，小弟目前剛學而已，不是非常懂哪裡出了錯誤，想請教各為大神幫忙一下，不好意思

#include "D:/pitches.h"
const int trig = 13;
const int echo = 12;
const int inter_time = 20;
int time = 0;
int brightness = 0;
int fadeAmount = 5;
int delayDuration = 30;
int ledPin1 =  3;
int ledPin2 =  4;
int ledPin3 =  6;
int ledState = LOW;
long previousTime = 1;
long interval = 3000;
int melody[] = {
  NOTE_G4, NOTE_G4 ,NOTE_E5, NOTE_D5, NOTE_C5, NOTE_G4,
  NOTE_G4, NOTE_G4, NOTE_E5, NOTE_D5, NOTE_C5, NOTE_A4,
  NOTE_A4, NOTE_A4, NOTE_F5, NOTE_E5, NOTE_D5, NOTE_A4,
  NOTE_G5, NOTE_G5, NOTE_F5, NOTE_D5, NOTE_E5, NOTE_C5,
  NOTE_G4, NOTE_G4, NOTE_E5, NOTE_D5, NOTE_C5, NOTE_G4,
  NOTE_G4, NOTE_G4, NOTE_E5, NOTE_D5, NOTE_C5, NOTE_A4,
  NOTE_A4, NOTE_F5, NOTE_E5, NOTE_D5, NOTE_G5, NOTE_G5, NOTE_G5, NOTE_G5,
  NOTE_A5, NOTE_G5, NOTE_F5, NOTE_D5, NOTE_C5,
  NOTE_E5, NOTE_E5, NOTE_E5, NOTE_E5, NOTE_E5, NOTE_E5,
  NOTE_E5, NOTE_G5, NOTE_C5, NOTE_D5, NOTE_E5,
  NOTE_F5, NOTE_F5, NOTE_F5, NOTE_F5, NOTE_E5, NOTE_E5, NOTE_E5, NOTE_E5,
  NOTE_E5, NOTE_D5, NOTE_D5, NOTE_C5, NOTE_D5, NOTE_G5,
  NOTE_E5, NOTE_E5, NOTE_E5, NOTE_E5, NOTE_E5, NOTE_E5,
  NOTE_E5, NOTE_G5, NOTE_C5, NOTE_D5, NOTE_E5,
  NOTE_F5, NOTE_F5, NOTE_F5, NOTE_F5, NOTE_E5, NOTE_E5, NOTE_E5, NOTE_E5,
  NOTE_G5, NOTE_G5, NOTE_F5, NOTE_D5, NOTE_C5};
  int duration[] = {
  125,125,125,125,125,250,
  125,125,125,125,125,250,
  125,125,125,125,125,250,
  125,125,125,125,125,750,
  125,125,125,125,125,250,
  125,125,125,125,125,250,
  125,125,125,125,125,125,125,125,
  125,125,125,125,250,
  125,125,250,125,125,250,
  125,125,125,125,250,
  125,125,125,125,125,125,125,125,
  125,125,125,125,250,250,
  125,125,250,125,125,250,
  125,125,125,125,250,
  125,125,125,125,125,250,250,250,
  125,125,125,125,500};

void setup() {
  Serial.begin(9600);
  pinMode (trig, OUTPUT);
  pinMode (echo, INPUT);
  pinMode(ledPin1, OUTPUT);
  pinMode(ledPin2, OUTPUT);
  pinMode(ledPin3, OUTPUT);
}

void loop() {
  float duration, distance;
  digitalWrite(trig, HIGH);
  delayMicroseconds(1000);
  digitalWrite(trig, LOW);
  duration = pulseIn (echo, HIGH);
  distance = (duration/2)/29;
  Serial.print("Data:");
  Serial.print (time/30);
  Serial.print(", d = ");
  Serial.print(distance);
  Serial.println(" cm");
  time = time + inter_time;
  delay(inter_time);
  unsigned long currentTime = millis();
  while(distance>0)
  {
if(distance>=100)
{
   digitalWrite(7,LOW);
   analogWrite(3, brightness);
   analogWrite(4, brightness);
   analogWrite(6, brightness);
   brightness = brightness + fadeAmount;
   if (brightness <= 0 || brightness >= 255) {
      fadeAmount = -fadeAmount ;
   }
   delay(delayDuration);
   break;
} else {
   digitalWrite(7, HIGH);
   for (int thisNote = 0; thisNote < 98; thisNote++) {
      tone(8, melody[thisNote], 250);
      delay(duration);
   }
   if(currentTime - previousTime > interval){

   if (ledState == LOW) {
      ledState = HIGH;
   } else {
      ledState = LOW;
   }

   digitalWrite(ledPin1, ledState);
   digitalWrite(ledPin2, ledState);
   digitalWrite(ledPin3, ledState);

   previousTime = currentTime;

   }
   break;
}
  }
}

作者: 超新手 時間: 2017-6-16 15:36
因為這個迴圈
while(distance>0)
{
....
}
你的程式就會卡在這個迴圈內
因為在這個迴圈內, 不會改變 distance 的值
所以一旦 distance 大於 0,
就會永遠卡在裡面出不來

作者: ray30908 時間: 2017-6-16 20:05

超新手發表於 2017-6-16 15:36
因為這個迴圈
while(distance>0)
{

改了還是沒辦法，不過還是謝謝你

作者: 超新手 時間: 2017-6-16 21:25
本帖最後由超新手於 2017-6-19 12:37 編輯

應該是delay(duration);這個寫錯了
你把兩個變數命名成同一名稱 duration
delay(duration);用的應該是 int duration[]
而不是 float duration
超音波用  float duration
蜂鳴器用  int duration[]
兩個沖到了

1) 把 float duration 名稱改掉
float dura, distance;;
................
  dura= pulseIn (echo, HIGH);
  distance = (dura/2)/29;
2) 把 delay 改正確
delay(duration[thisNote]);

至於 while 雖然是錯的
但因為裡面加了兩個 break
所以負負得正，所以又變得沒問題

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