首先,对于Arduino来说是非常新颖的,我已经搜遍了一些教程来努力完成这项工作,似乎没有任何东西能够帮助我。我试图做的是当按下按钮时,LCD背光启动8秒钟。实现非阻塞定时操作 - 没有延迟() - 对于Arduino
我有轻微的成功与我的代码第一次尝试:
const int buttonPin = 13; // the number of the pushbutton pin
const int ledPin = 9; // the number of the LED pin
// variables will change:
int buttonState = 0; // variable for reading the pushbutton status
void timeDelay(){
digitalWrite (ledPin, HIGH);
delay(8000);
digitalWrite (ledPin, LOW);
}
void setup() {
// initialize serial communications at 9600 bps:
Serial.begin(9600);
// initialize the LED pin as an output:
pinMode(ledPin, OUTPUT);
// initialize the pushbutton pin as an input:
pinMode(buttonPin, INPUT);
}
void loop() {
// read the state of the pushbutton value:
buttonState = digitalRead(buttonPin);
// check if the pushbutton is pressed.
// if it is, the buttonState is HIGH:
if (buttonState == HIGH) {
// turn LED on:
timeDelay();
}
}
这个伟大的工程,我按下按钮,它调用脚本,唯一的问题是,它使得一切就暂停。似乎我需要使用'millis'来实现解决方案,但是我所看到的所有内容都是基于BlinkWithoutDelay草图,而我似乎无法做到这一点。
任何意见或相关教程将是伟大的。
编辑:
我想感谢pirho下面的解释。这是我的代码能够使工作感谢他们的指导:
// constants won't change. Used here to set a pin number :
const int ledPin = 9;// the number of the LED pin
const int buttonPin = 13; // the number of the pushbutton pin
// Variables will change :
int ledState = LOW; // ledState used to set the LED
int buttonState = 0; // variable for reading the pushbutton status
// Generally, you should use "unsigned long" for variables that hold time
// The value will quickly become too large for an int to store
unsigned long previousMillis = 0; // will store last time LED was updated
unsigned long currentMillis = 0;
unsigned long ledTimer = 0;
// constants won't change :
const long interval = 8000; // interval at which to blink (milliseconds)
void setup() {
// set the digital pin as output:
pinMode(ledPin, OUTPUT);
// digitalWrite(ledPin, ledState);
pinMode(buttonPin, INPUT);
}
void loop() {
// here is where you'd put code that needs to be running all the time.
currentMillis = millis();
buttonState = digitalRead(buttonPin);
ledTimer = (currentMillis - previousMillis);
if (buttonState == HIGH) {
digitalWrite (ledPin, HIGH);
previousMillis = millis();
}
if (ledTimer >= interval) {
// save the last time you blinked the LED
digitalWrite (ledPin, LOW);
} else {
digitalWrite (ledPin, HIGH);
}
}
谢谢,当你分解它时,它确实非常有帮助。我发布了我能够完成的最终代码。再次感谢您的帮助! –