百度试题 结果1 题目Arduino UNO/Nano主控板,pinMode函数中,设置数字引脚为输入模式的参数有?( ) A. INPUT B. OUTPUT C. INPUT_PULLUP D. INPUT_PULLDOWN 相关知识点: 试题来源: 解析 A|C 答案:A|C 试题解析:反馈 收藏
This example demonstrates the use of pinMode(INPUT_PULLUP). It reads a 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 n...
通过这些函数，我们可以实现对LED的点亮操作。pinMode(pin,mode)函数用于设定Arduino开发板上某个引脚的工作模式。具体来说，它可以设置为INPUT模式，用于接收外部信号或传感器数据；或者设置为INPUT_PULLUP模式，该模式下引脚连接到一个内部的上拉电阻，保持高电平状态，当外部电平为低时，读数会切换到LOW。此外，还有O...
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...
pinMode(pullDown, INPUT); } void loop() { // read buttons states int buttonUpState = digitalRead(pullUp); int buttonDownState = digitalRead(pullDown); // make a message that will be sent to the serial line String message = “Pull Up: ” + String(buttonUpState); ...
pinMode(BUTTON_PIN, INPUT); Great! Now the default value when the button is not pressed is LOW. And in this example when I pressed the button the state rose to HIGH. Conclusion – Arduino INPUT_PULLUP recap In this tutorial you’ve seen how to properly use pull up and pull down resi...
* Built-in LED on pin 13 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. ...
{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(data_pin, INPUT_PULLUP);#elsepinMode(irq_pin, INPUT);digitalWrite(irq_pin, HIGH);pinMode(data_pin, INPUT);digitalWrite(data_pin, HIGH);#endifswitch(irq_pin) {#ifdef CORE_INT0_PINcase CORE_INT0_PIN:irq_num = 0;break;#endif#ifdef CORE_INT1_PINcase CORE_INT1_PIN:irq_num...
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 ...