8 Replies Latest reply on Nov 11, 2014 9:25 PM by indrazno

    Intel Galileo Maximum Interrupt Frequency

    indrazno

      Hi all,

       

      I have been trying to use the Interrupt technique to count the rising and falling edge signal from the optical encoder. I did a test using a function generator (TTL square wave).

      I have found that the maximum frequency of the square wave signal was 55 Hz.

      I wonder if there is possibility to improve the maximum interrupt frequency up to 500 KHz. I copied a simple code for my test below

       

      #define qIntEncoderPinA 2

      volatile int _qEncoderTicks = 0;

       

      void setup() {

        Serial.begin(9600);   

        attachInterrupt(qIntEncoderPinA, qInterruptHandler, CHANGE);

      }

       

      void loop() {

        Serial.println(_qEncoderTicks);

        _qEncoderTicks = 0;

        delay(1000);

      }

       

      void qInterruptHandler(){

        _qEncoderTicks ++;

      }

       

       

      Please kindly advice me if anyone knows the solution and that would be very much appreciated.

       

      Thank you.

       

      Regards

      Indrazno