http://www.arduino.cc/en/Tutorial/InputPullupSerial This example code is in the public domain */ void setup() { //start serial connection Serial.begin(9600); //configure pin2 as an input and enable the internal pull-up resistor pinMode(2, INPUT_PULLUP); pinMode(13, OUTPUT); } void...
2、数字输入上拉 DigitalInputPullup - 输出上拉串口 InputPullupSerial This example demonstrates the use of INPUT_PULLUP with pinMode(). It monitors the state of a switch by establishingserial communicationbetween your Arduino and your computer over USB. 本例演示如何使用 pinMode 和 INPUT_PULLUP。
Using an external resistor instead of Arduino INPUT_PULLUP Pull up resistor Instead of using the internal pull up resistor from your Arduino board, you could decide to create the circuit yourself and add an external pull up resistor. Your circuit will look like this. ...
mode:GPIO的I/O模式,取值有3种 INPUT :作为数字输入 OUTPUT :作为数字输出 INPUT_PULLUP:作为数字输入,且使能引脚的内部上拉电阻 Arduino的引脚,在上电时默认就是输入模式,但最好使用pinMode设置,更加明确。 当配置引脚为数字输入模式时,引脚表现为高阻抗状态,引脚内部的电流非常小,就如同在引脚前接了一个100M...
Arduino Pinmode Input Pull-Up Simulink Device Driver (https://www.mathworks.com/matlabcentral/fileexchange/66820-arduino-pinmode-input-pull-up-simulink-device-driver), MATLAB Central File Exchange. 검색 날짜: 2025/4/27. 필수 제품: Simulink Arduino hardware support packag...
void pinMode(pin_size_t pin, PinMode mode):设置引脚的输入状态,常用的mode有INPUT、INPUT_PULLUP、INPUT_PULLDOWN等;在上图的按钮应用中应该设置为 INPUT_PULLUP; PinStatus digitalRead(pin_size_t pin):读指定的pin的状态; 将前面的输出和读引脚状态整合在一起,即将读到的BTN的状态直接输出到一个LED上...
{delay(1000);lcd.begin(16,2);Serial.begin(9600);pinMode(enroll, INPUT_PULLUP);pinMode(up, INPUT_PULLUP);pinMode(down, INPUT_PULLUP);pinMode(del, INPUT_PULLUP);pinMode(match, INPUT_PULLUP);pinMode(buzzer, OUTPUT);pinMode(indFinger, OUTPUT);digitalWrite(buzzer, LOW);if(digitalRead(en...
pinMode(26, INPUT|PULLUP ); // 检测到引脚 26 下降沿,触发中断函数 blink attachInterrupt(26, blink, FALLING); Serial.println("\nstart irq test"); } void loop() { } // 中断函数 void blink() { Serial.println("IRQ"); } 二、IIC 使用简析 ...
Step 2:Initialize digital pin 2 as an input with the internal pull-up resistor enabled: pinMode(2,INPUT_PULLUP); Step 3:Enter the following line, making pin 13, with the onboard LED an output pinMode(13, OUTPUT); Step 4:Establish a variable to hold the information coming in from you...
#include <Encoder.h> Encoder encoder(2, 3); int buttonPin = 4; volatile int count = 0; void setup() { pinMode(buttonPin, INPUT_PULLUP); attachInterrupt(digitalPinToInterrupt(buttonPin), buttonPressed, FALLING); Serial.begin(9600); } void loop() { int newPosition = encoder.read(...