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); message = message + “。 Pull Down: ” + String(buttonDownState); // send the message...
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 #...
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 20K-ohm resistor is pulled to 5V. This configuration...
AI代码解释 #include<Gizwits.h>#include<Wire.h>#include<SoftwareSerial.h>int ledPin=13;// LED connected to digital pin 13,it's used for statusint myledPin=4;// my LED connected to digital pin 4int sensorValue=0;// value read from the potbool varR_LED_OnOff=0;Gizwits myGizwits;#d...
pinMode(ledPin, OUTPUT); 在setup函数中,我们有一个单独的命令。pinMode函数告诉编译器如何使用一个管脚。在这种情况下,我们声明ledPin(值为 13)为输出引脚。这告诉编译器我们正在发送信号,并且我们不期望通过这个管脚接收信号。然后,在开始我们的loop函数之前,我们用右括号关闭setup函数。
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...
//configure pin 2 as an input and enable the internal pull-up resistor pinMode(2, INPUT_PULLUP); pinMode(13, OUTPUT); } void loop() { //read the pushbutton value into a variable int sensorVal = digitalRead(2); //print out the value of the pushbutton ...
OUTPUT: this is to write data to an actuator, for example an LED. INPUT: in this case you’re going to read data from the sensor. The value you’ll get will be HIGH or LOW (binary). And… There’s also a 3rd option: INPUT_PULLUP. This option is the same as INPUT (you read...
// Set all output pins LOW PORTB = 0b00000000 ; // Motor Spin-down grace period delay( 300 ) ; } void bridgeForward( void ) { bridgeOFF() ; // Forward, D8+D9+D13 HIGH, D13 is the onboardLED. PORTB = 0b00100011 ;
pinMode(15, OUTPUT); //HSPI SS } // the loop function runs over and over again until power down or reset void loop() { //use the SPI buses vspiCommand(); hspiCommand(); delay(100); } void vspiCommand() { // 模拟数据 ...