Question

我正在尝试用我的Arduino制作水果钢琴，现在我只是在纸上使用油漆。当我按下按钮时，我会得到多行输出。我该如何解决这个问题。这是一个正在发生的事情的视频（对不起质量）：https://www.youtube.com/watch?v=zr2mQMRO6IY

代码：

#include <CapacitiveSensor.h>


/* DIY Piano

   - DIY Piano with Arduino. This is a very simple project.
   - ONLY needed some very cheap materials,
     e.g. pencil, A4 paper, paper clip, speaker, male-to-male jumper, breadboard and Arduino Uno board.
   - Of course the Arduino Uno board is not cheap, but it is reusable for other projects too. So it is worth to own one.

   - This project using the concept of capasitive sensor, so no switch/button is required for it.
   - Here is the link of capacitive sensor. For better understanding, please visit the page.
     http://playground.arduino.cc//Main/CapacitiveSensor?from=Main.CapSense

   - To watch the Demo of This Project:
     http://www.youtube.com/watch?v=X4QNT5hOHLs&list=TLlm-tAV1gEzDF4VV39VdjCSLNlfe0tTpU


   Created by:
   Oh Hai Seng || Junny Oh    07 November 2013
*/



// Import the CapacitiveSensor Library.
#include <CapacitiveSensor.h>


// Name the pin as led. 
//#define speaker 11


// Set the Send Pin & Receive Pin
CapacitiveSensor   cs_2_4 = CapacitiveSensor(2,4);        // 10M resistor between pins 4 & 6, pin 6 is sensor pin, add a wire and or foil


void setup()                    
{
  cs_2_4.set_CS_AutocaL_Millis(0xFFFFFFFF);     // turn off autocalibrate on channel 1 - just as an example

  // Arduino start communicate with computer.
  Serial.begin(9600);
}

void loop()                    
{
  // Set a timer.
  long start = millis();

  // Set the sensitivity of the sensors.
  long total2 =  cs_2_4.capacitiveSensor(60);


  // When hand is touched the sensor, the speaker will produce a tone.
  // I set a threshold for it, so that the sensor won't be too sensitive.
  if (total2 > 590){ i++; Serial.println( i + " Touched!\n");}
  delay(0);                             // arbitrary delay to limit data to serial port 
}

Answer 1

Arduino使用循环，每次进入循环时都会执行整个代码，这就是为什么你在屏幕上得到多个输出。

您需要做的是标记按下按钮的时间，如

buttonOnePressed = true;

直到你进入按下按钮的状态但变量buttonOnePressed为真，你就什么也不做，这将避免多个输出。但是当库检测到手指被移除时，请确保将变量设置为零，否则您将无法再次重新按下它。

Arduino：按下按钮时只返回一个输出

1 个答案: