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桂林两江四湖象山景区简介,保定seo推广,wordpress自定义文章页面模板下载,乌镇网站开发文档Arduino示例代码讲解：Ping Ping功能概述硬件部分：软件部分：代码逐行解释定义常量`setup()` 函数`loop()` 函数`microsecondsToInches()` 函数`microsecondsToCentimeters()` 函数工作原理Ping 这段代码是一个Arduino示例程序，用于读取Parallax PING)))超声波测距传感器的数…

Arduino示例代码讲解：Ping

Ping
- 功能概述
- - - 硬件部分：
    - 软件部分：
- 代码逐行解释
- - - 定义常量
    - `setup()` 函数
    - `loop()` 函数
    - `microsecondsToInches()` 函数
    - `microsecondsToCentimeters()` 函数
- 工作原理

Ping

这段代码是一个Arduino示例程序，用于读取Parallax PING)))超声波测距传感器的数据，并计算出距离最近物体的距离。它将距离值通过串行通信发送到计算机，适用于需要测量距离的场景。

/* Ping))) SensorThis sketch reads a PING))) ultrasonic rangefinder and returns thedistance to the closest object in range. To do this, it sends a pulseto the sensor to initiate a reading, then listens for a pulseto return.  The length of the returning pulse is proportional tothe distance of the object from the sensor.The circuit:* +V connection of the PING))) attached to +5V* GND connection of the PING))) attached to ground* SIG connection of the PING))) attached to digital pin 7http://www.arduino.cc/en/Tutorial/Pingcreated 3 Nov 2008by David A. Mellismodified 30 Aug 2011by Tom IgoeThis example code is in the public domain.*/// this constant won't change.  It's the pin number
// of the sensor's output:
const int pingPin = 7;void setup() {// initialize serial communication:Serial.begin(9600);
}void loop()
{// establish variables for duration of the ping,// and the distance result in inches and centimeters:long duration, inches, cm;// The PING))) is triggered by a HIGH pulse of 2 or more microseconds.// Give a short LOW pulse beforehand to ensure a clean HIGH pulse:pinMode(pingPin, OUTPUT);digitalWrite(pingPin, LOW);delayMicroseconds(2);digitalWrite(pingPin, HIGH);delayMicroseconds(5);digitalWrite