Calibrating Nawrath's "FreqCounter.h"

greetings,

i using nawrath's "freqcounter.h" using following demo code:

code: [select]

// frequency counter lib example

/*
  martin nawrath khm lab3
  kunsthochschule f¸r medien kˆln
  academy of media arts
  http://www.khm.de
  http://interface.khm.de/index.php/labor/experimente/
*/
#include <freqcounter.h>


unsigned long frq;
int cnt;
int pinled=13;

void setup() {
  pinmode(pinled, output);

  serial.begin(115200);        // connect serial port

  serial.println("frequency counter");

}



void loop() {

  // wait if serial going on
  freqcounter::f_comp=10;   // cal value / calibrate professional freq counter
  freqcounter::start(100);  // 100 ms gate time

  while (freqcounter::f_ready == 0)

  frq=freqcounter::f_freq;
  serial.print(cnt++);
  serial.print("  freq: ");
  serial.println(frq);
  delay(100);  //original delay delay(20);
  digitalwrite(pinled,!digitalread(pinled));  // blink led

} 


which example.

when put 280 hz in reading of 28.

when put 28,000 hz in reading of 2,800.

how should correct factor of 10 error?

thanks and...

kindest regards,

paul flint

multiply 10?

maybe has line - freqcounter::f_comp=10;

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