Question

我试图通过按钮打开和关闭Arduino。我使用了教程https://www.instructables.com/id/A-Guide-to-Putting-Your-Arduino-to-Sleep/，以了解如何做到这一点。但不幸的是，这种情况并不适合100％。我希望通过同一开关（而不是通过计时器）打开和关闭两者。因此，我已经按照下面所示的方式实现了它，只是通过attachInterrupt（）将不同的函数重新分配给事件。就像您一旦分配给事件便无法重新分配该功能。是这样吗有人可以解决这个问题吗？

在再次使用attachInterrupt之前，我已经添加了detachInterrupt。另外，我已经在两者之间添加了延迟。尝试过的中断事件HIGH，LOW和CHANGE总是相同的结果，它们进入睡眠状态，但再也不会唤醒。

#include <avr/sleep.h>
#define INTERRUPT_PWR_BUTTON_PIN 2 // pin for power button (Power button)

void setup() {                
    Serial.println("I'm up...");
    attachInterrupt (digitalPinToInterrupt(INTERRUPT_PWR_BUTTON_PIN), goToSleep, HIGH); //attaching wakeup to interrup 0 on pin 2
    delay(1000);
}

void loop() {
    Serial.println("Ping");
    delay(1000);              // wait 1 sec
}

void goToSleep() {
    Serial.println("Power Button pressed...");
    Serial.flush();
    sleep_enable(); // only enabling sleep mode, nothing more
    detachInterrupt(digitalPinToInterrupt(INTERRUPT_PWR_BUTTON_PIN)); //remove interrupt 0 from pin 2
    attachInterrupt (digitalPinToInterrupt(INTERRUPT_PWR_BUTTON_PIN), wakeUp, HIGH);
    /* 2019-05-02 NN: Does not work, device will not wake up at all, unless pressing reset -> 2 buttons for now */
    set_sleep_mode(SLEEP_MODE_PWR_DOWN); // setting sleep mode to max pwr saving
    digitalWrite(LED_BUILTIN, LOW);
    delay(1000);
    sleep_cpu();
    Serial.println("Just woke up!"); // gets executed after interrupt
    digitalWrite(LED_BUILTIN, HIGH);  
}

void wakeUp () {
    Serial.println("Wakeup Interrupt Fired");
    sleep_disable();
    detachInterrupt(digitalPinToInterrupt(INTERRUPT_PWR_BUTTON_PIN)); //remove interrupt 0 from pin 2
    attachInterrupt (digitalPinToInterrupt(INTERRUPT_PWR_BUTTON_PIN), goToSleep, HIGH);
}

Answer 1

由于您只想使用一个按钮，因此可以通过中断触发切换功能，并通过该功能使Arduino睡眠或唤醒。您必须使用一个布尔标志来实现这一点。

...
// use flag to control state of sleep
bool isSleeping = false;

void setup() {
    ...
    attachInterrupt (digitalPinToInterrupt(INTERRUPT_PWR_BUTTON_PIN), toggleSleepState, HIGH); //attaching wakeup to interrup 0 on pin 2
    ...
}

void loop() {
    ...
}

void toggleSleepState() {

    static unsigned long last_interrupt_time = 0;
    unsigned long interrupt_time = millis();
    // If interrupts come faster than 200ms, assume it's a bounce and ignore
    if (interrupt_time - last_interrupt_time > 200) 
    {
        // toggle state of sleep
        isSleeping = !isSleeping;

        if (isSleeping == true) {
            goToSleep();
        }
        else {
            wakeUp()
        }
    }
    last_interrupt_time = interrupt_time;
}

void goToSleep() {
    // sleep logic
}

void wakeUp () {
    // wake up logic
}

通过按钮打开和关闭Arduino

1 个答案: