Intel Galileo Maximum Interrupt Frequency

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