However, you want the program to react to a button press to start another activity. While polling the serial port, your program does nothing else and this is where interrupts come in. [Yes I know the serial port has its own interrupt - give me a break - its just an example for ...
Maybe using millis() or micros() can sometimes be useful, if you want to make a comparison of duration (for example to debounce a button). But you can also do that in your code, using the interrupt only to notify of a change in the state of the monitored signal. ...
int debouncePeriod = 20; // debounce delay of 20ms int debounceMillis = 0; // similar to previousMillis bool buttonPushed = false; // interrupt routine button status int ledChange = LOW; // to track the led status last int lastState = HIGH; // to track last button state void setup...
int debounceMillis = 0;复制代码 这三个变量将用于存储按钮状态作为中断、切换LED和按钮状态。bool ...
int debounceMillis = 0; 这三个变量将用于存储按钮的状态为中断、切换 LED 和按钮状态。 bool buttonPushed = false; int ledChange = 低; 诠释最后状态=高; 定义引脚的动作,哪个引脚将作为 INPUT 或 OUTPUT 工作。 pinMode(led1,输出); pinMode(led2,输出); ...
一开始我猜到了这个鬼畜输入可能是电压拨动(主要是玩机械键盘了解到的)但不知道在微电子的术语叫做“消抖(debounce)”。最常见的消抖就是增加检测间隔让两次采样不会落在抖动期间,所以我一开始设置的10ms间隔算是歪打正着地解决了这个问题。更稳妥的办法是连续两次循环内检测到状态变成另一个电平才识别,我也确实...
See DebounceTest example. Button 1 can used at any pin supporting pin change interrupt. The exact pin numbers of the buttons are available by the macros INT0_PIN and INT1_PIN, which are set after the include. Table of available pins for the 2 buttons CPUButton 0Button 1 using INT1...
Now, the code to detect when the button is released: #define BUTTON_PIN 3 volatilebyte buttonReleased =false; voidbuttonReleasedInterrupt(){ buttonReleased =true; } voidsetup(){ Serial.begin(9600); pinMode(BUTTON_PIN, INPUT); attachInterrupt(digitalPinToInterrupt(BUTTON_PIN), ...
delay(100); // Wait for button debounce while (digitalRead(buttonPin) == LOW) {} // Wait...
这里放个0.5秒测试unsignedlongdebounceDelay=500;// the debounce time; increase if the output flickersvoidloop(){// read the state of the switch into a local variable:intreading=digitalRead(buttonPin);// check to see if you just pressed the button// (i.e. the input went from LOW to ...