Newbie – Have put together a 4 wheeled robot car – With utltrasonic ping sensor

Q&A Forum › Category: Arduino › Newbie – Have put together a 4 wheeled robot car – With utltrasonic ping sensor – Using the Adafruit V2 motor shield

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Bob Jones asked 9 years ago

I am building a CPP library (class) to manage obstacle detection using the HC-SR02 sensor. I want to have all the methods that manage this device inside a class, but this proves challenging because the attachInterrupt function cannot call outside the class. What I need is a simple example of how to do this. My goal is that I be able to easily replicate this solution into lots of robots.

Question Tags: HC-SR02 Interrupts Class

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Bob Jones answered 9 years ago

Some additional information In sketch (before setup): BJMotionDetector myDetector; In Setup: attachInterrupt(0, myDetector.echoInterrupt,0); // Attach interrupt to the sensor echo input In Class: void * BJMotionDetector::echoInterrupt() Compiler output: error: cannot convert ‘BJMotionDetector::echoInterrupt’ from type ‘void* (BJMotionDetector::)()’ to type ‘void (*)():attachInterrupt(ECHO_INTERRUPT, myDetector.echoInterrupt, CHANGE)Error compiling .ino source

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Rui Santos Staff answered 9 years ago

Do you mean the HC-SR04 sensor? Which library are you using with that sensor? The NewPing? http://playground.arduino.cc/Code/NewPing

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Bob Jones answered 9 years ago

I am writing my own library. My goal is to use as much of my own code as possible (learning objective). I want to see an example of a hardware interrupt used within a class library.