ray30908 發表於 2017-6-16 14:47:46

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, 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;                                                   
    }
}
}

超新手 發表於 2017-6-16 15:36:10

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

ray30908 發表於 2017-6-16 20:05:02

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

超新手 發表於 2017-6-16 21:25:21

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);

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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