pinMode函数 引脚模式选择,模式有INPUT(输入), OUTPUT(输出), INPUT_PULLUP(上拉输入,自动拉高电平) //GPIO FUNCTIONS #defineINPUT0x00 //输入 #defineINPUT_PULLUP0x02 //上拉输入 #defineINPUT_PULLDOWN_160x04// PULLDOWN only possible for pin16下拉输入仅适用于PIN16脚 #defineOUTPUT0x01 //输出 #...
Serial.println("中断测试实验"); pinMode(interruptPin_0, INPUT_PULLUP); //先把引脚设置为上拉输入模式 pinMode(interruptPin_1, INPUT_PULLDOWN); //这个我们设置为下拉 //我们通过调用attachInterrupt函数将中断附加到引脚 //handleInterrupt 是中断触发后的触发函数 //FALLING 代表下拉触发,也就是由高电平...
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。
结果1 题目ESP32 for Arduino ,读取按键开关的返回值,当不采用外部电阻上拉或下拉时,程序中[ ]的值可以为?( )A. INPUT B. OUTPUT C. INPUT_PULLUP D. INPUT_PULLDOWN 相关知识点: 试题来源: 解析 C|D 题型:多选题 答案:C|D反馈 收藏
Unlike pinMode(INPUT), there is no pull-down resistor necessary. An internal 20K-ohm resistor is pulled to 5V. This configuration causes the input to read HIGH when the switch is open, and LOW when it is closed. created 14 March 2012 ...
digital input on pin 2 and prints the results to the serial monitor. The circuit: * Momentary switch attached from pin 2 to ground * Built-in LED on pin 13 Unlike pinMode(INPUT), there is no pull-down resistor necessary. An internal ...
//使用于通用的Arduino的引脚模式定义typedefenum{INPUT=0x0,OUTPUT=0x1,INPUT_PULLUP=0x2,INPUT_PULLDOWN=0x3,}PinMode;//RPI Pico的引脚模式定义/* Define mock symbols to nullify PinMode definitions */#define PullNone TempPullNone#define PullUp TempPullUp#define PullDown TempPullDown#define OpenDra...
/*** 函数介绍 ***//* 作用 : 设置GPIO的模式* 传入参数 :* pin : 设置要配置的GPIO,直接输入数字即可,比如配置GPIO33,就输入33* mode : 可选参数如下 >INPUT (设置为无上拉或下拉(高阻抗)的输入)OUTPUT (设置为输出)INPUT_PULLDOWN (设置为具有内部下拉的输入)INPUT_PULLUP (设置为带有内部上拉电阻...
百度试题 结果1 题目Arduino UNO/Nano主控板, 数字引脚工作模式有?(本题4分) A. INPUT B. OUTPUT C. INPUT _PULLUP D. INPUT _PULLDOWN 相关知识点: 试题来源: 解析 ABC 反馈 收藏
pinMode(BUTTON_PIN, INPUT); instead of pinMode(BUTTON_PIN, INPUT_PULLUP);. When you run the program you will have the same result: the default state for the button is HIGH, and when you press it, its states goes to LOW. Pull down resistor This is another option you can choose, ...