使用中断来处理arduino中的布尔值

Question

I've researched a bit, and I've ran into a couple of examples of how buttons are used as interrupts. However, the design I'm trying to implement uses analog sensors. Right now, what I want to do is to have my analog sensors flag a boolean to tell the interrupt to execute, not a button. How would I do so?

This is what I have thought up based on what I researched:

    boolean isWall;

    attachInterrupt(isWall, interruptFunction, RISING);

    void loop() {
        if(analogSensor.response > 450) {
                isWall = true;
        }
        normalExecution();  // what it normally does if isWall is false 
    }

    void interruptFunction() {
          // code implementation
          isWall = false;  // set isWall back to false after executing interruptFunction
    }

    void normalExecution() {
          // foo
    }

Can someone verify?

Answer 1

Perhaps I am completely wrong but it has always been my understanding that interrupts in Arduino are based on the voltage seen by a pin - ie they are hardware interrupts. Consequently, while your code is correct for a hardware interrupt, it will not work for a change in a variable.

That said, this link and this link discuss Analog Comparator methods for accomplishing what you are trying to do.