原文https://www.yiboard.com/thread-1178-1-1.html，第一次写博客，如果有任何关于转载的问题，请联系我
用Arduino实现一定程度上的多任务系统，实现同时操控三组led灯的开关情况，在我的测试中，黄灯以200ms为间隔闪烁，蓝灯以1s为间隔闪烁，而红灯通过按键控制开关，并且相互发生的情况并不受干扰。
下面是电路连接
下面是实现代码
/* Arduino Multitasking
Author : CircuitDigest (circuitdigest.com)
*/
int led1 = 6; // led1 connected at pin 6
int led2 = 7; // led1 connected at pin 7
int toggleLed = 5; // push button controlled led connected at pin 5
int pushButton = 2; // push butoon connected at pin 2 which is also interrupt pin
int ledState1 = LOW; // to determine the states of led1 and led2
int ledState2 = LOW;
unsigned long previousMillis1 = 0; //store last time LED1 was blinked
const long period1 = 1000; // period at which led1 blinks in ms
unsigned long previousMillis2 = 0; //store last time LED2 was blinked
const long period2 = 200; // period at which led1 blinks in ms
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() {
pinMode(led1, OUTPUT); // define pins as input or output
pinMode(led2, OUTPUT);
pinMode(toggleLed, OUTPUT);
pinMode(pushButton, INPUT);
attachInterrupt(digitalPinToInterrupt(pushButton), pushButton_ISR, CHANGE); // use interrupt pin2
}
void pushButton_ISR()
{
buttonPushed = true; // ISR should be as short as possible
}
void loop() {
//控制蓝灯闪烁
unsigned long currentMillis = millis(); // store the current time
if (currentMillis - previousMillis1 >= period1) { // check if 1000ms passed
previousMillis1 = currentMillis; // save the last time you blinked the LED
if (ledState1 == LOW) { // if the LED is off turn it on and vice-versa
ledState1 = HIGH; //change led state for next iteration
} else {
ledState1 = LOW;
}
digitalWrite(led1, ledState1); //set LED with ledState to blink again
}
//控制黄灯闪烁
if (currentMillis - previousMillis2 >= period2) { // check if 200ms passed
previousMillis2 = currentMillis; // save the last time you blinked the LED
if (ledState2 == LOW) { // if the LED is off turn it on and vice-versa
ledState2 = HIGH;
} else {
ledState2 = LOW;
}
digitalWrite(led2, ledState2);//set LED with ledState to blink again
}
if (buttonPushed = true) // check if ISR is called
{
if ((currentMillis - debounceMillis) > debouncePeriod && buttonPushed) // generate 20ms debounce delay to avoid multiple presses
{
debounceMillis = currentMillis; // save the last debounce delay time
//开关控制红灯
if (digitalRead(pushButton) == LOW && lastState == HIGH) // change the led after push button is pressed
{
ledChange = ! ledChange;
digitalWrite(toggleLed, ledChange);
lastState = LOW;
}
else if (digitalRead(pushButton) == HIGH && lastState == LOW)
{
lastState = HIGH;
}
buttonPushed = false;
}
}
}
