// read the input on analog pin 0: int sensorValue = analogRead(A0); // Convert the analog reading (which goes from 0 - 1023) to a voltage (0 - 5V): float voltage = sensorValue * (5.0 / 1023.0); // print out the value you read: Serial.println(voltage); } 代码功能 读取电位...
pin:要设置其输出的引脚编号 value:HIGH(1),LOW(0) 返回值:无 模拟I/O 函数 Analog I/O Functions analogWrite(): 描述:在指定引脚输出指定占空比的 PWM 方波 函数原型:analogWrite(pin,value) 参数: pin:输出引脚 value:占空比,介于 0 - 255 之间 返回值:无 analogRead(): 描述:读取指定引脚的模拟信...
void loop() { // read the input on analog pin 0: int sensorValue =analogRead(A0); // Convert the analog reading (which goes from 0 - 1023) to a voltage (0 - 5V): float voltage = sensorValue * (5.0 / 1023.0); // print out the value you read: Serial.println(voltage); } 火...
#include<Servo.h>Servo myservo;// create servo object to control a servoint potpin=0;// analog pin used to connect the potentiometerintval;// variable to read the value from the analog pinvoidsetup() { myservo.attach(9);// attaches the servo on pin 9 to the servo object}voidloop()...
sensorValue=analogRead(analogInPin);// 读取模拟输入的值 analogRead函数读出了A0脚获取的模拟输入值,从刚才的演示中可以知道范围是0~1023。 注释:Arduino UNO的内置ADC精度是十位,用二进制表达就是十个二进制位,总信息量就是2的10次方(2^10==1024),从0开始就是0~1023了。
pinMode(A0,OUTPUT)...temp = analogRead(A0)想请问为什么将传感器输出口连接的A0设置为OUTPUT?这里不是用作数据输入吗,应该是INPUT把?不过我试了一下设置为OUTPUT和INPUT获取的数值差不多。是不是模拟口在没有Write过数据前设置IN/OUT没有差别呢?请问是什么原理。附上官网对于AnalogPin的一段话,也是要求在analog...
// read the input on analog pin 0: int sensorValue = analogRead(A0); // Convert the analog reading (which goes from 0 - 1023) to a voltage (0 - 5V): float voltage = sensorValue * (5.0 / 1023.0); // print out the value you read: ...
// read the input on analog pin 0: 从模拟针脚 0 读取输入 int sensorValue = analogRead(A0); // Convert the analog reading (which goes from 0 - 1023) to a voltage (0 - 5V): 将模拟读取(从 0-1023)转换为电压(0 - 5V): float voltage = sensorValue * (5.0 / 1023.0); ...
analogWrite(pin,Value) pin:3,5,6,9,10 ;在Arduino Mega2560中PWM口编号为2-13 Value: 设置输出的信号占空比,范围0-255 返回:None eg: 1 int ledPin=9; 2 int analogPin=3; 3 int val=0; 4 void setup() 5 { 6 pinMode(ledPin,OUTPUT); ...
禁止串口传输函数。此时串口传输的pin脚可以作为数字IO脚使用 Serial.end(); Serial.available() 判断串口接收缓冲器的状态函数,读取串口接收缓冲器的值,以判断数据送达到串口 1intincomingByte=0;2voidsetup()3{4Serial.begin(9600);5}6voidloop()7{8if(Serial.available()>0)9{10incomingByte=Serial.read()...