correzione nel file della libreria c'é questa istruzione :
pinMode(5,OUTPUT);
quindi non puo funzionare sul mega perché non é indirizzata correttamente , giusto ?
/*
FreqPeriod
Counter1 unit capturing analog comparator event measuring period length of analog signal on input AIN1
AIN0 set to VCC/2 by resistors
pin5 used as output for comparator feedback
Analog comparator interrupt service is used to calculate period length
Timer1 overflow interrupt service used to count overflow events
Martin Nawrath KHM LAB3
Kunsthochschule für Medien Köln
Academy of Media Arts
http://www.khm.de
http://interface.khm.de/index.php/labor/experimente/
History:
June 2010 - V0.0
*/
#include <FreqPeriod.h>
#include <wiring.h>
#include <pins_arduino.h>
volatile unsigned char FreqPeriod::f_capt;
volatile unsigned int FreqPeriod::capta;
volatile unsigned long int FreqPeriod::captd;
volatile int FreqPeriod:: ocnt;
void FreqPeriod::begin(){
#if defined (AVR_ATmega168) || defined (AVR_ATmega48) || defined (AVR_ATmega88) || defined (AVR_ATmega328P) || (AVR_ATmega1280)
pinMode(5,OUTPUT);
TCCR1A =0;
TCCR1B =0;
ADCSRB &= ~(1<<ACME);
ACSR &= ~(1<<ACD) ; // Analog Comparator disable off
// ACSR |= (1<<ACBG); // Analog Comparator Bandgap reference on
ACSR |= (1<<ACIE); // Analog Comparator Interrupt enable
ACSR |= (1<<ACIC);
ACSR &= ~(1<<ACIS0); // comparator detection edge
ACSR |= (1<<ACIS1); // comparator detection edge
// CS12 CS11 CS10 Description
// 0 0 0 No clock source (Timer/Counter stopped).
// 0 0 1 clkI/O/1 (No prescaling)
// 0 1 0 clkI/O/8 (From prescaler)
// 0 1 1 clkI/O/64 (From prescaler)
// 1 0 0 clkI/O/256 (From prescaler)
TCCR1B |= (1<<CS10); // set prescaler to 16 MHz
TCCR1B &= ~(0<<CS11);
TCCR1B &= ~(0<<CS12);
TCCR1B |= (1<<ICNC1); // input noise canceler on
TCCR1B &= ~(1<<ICES1); // input capture edge select =0
DIDR1 |= (1<< AIN0D); // disable digital input buffer AIN0/1
DIDR1 |= (1<< AIN1D);
TIMSK1 |= (1<<TOIE1); // Timer/Counter1, Overflow Interrupt Enable
// TIMSK0 &= ~(1<<TOIE0); // Timer/Counter0, Overflow Interrupt disable
#endif
}
//***************************************************************************
unsigned long int FreqPeriod::getPeriod() {
unsigned long int rr= 0;
if ( FreqPeriod::f_capt){
FreqPeriod::f_capt=0;
rr= FreqPeriod::captd;
}
return(rr);
}
//***************************************************************************
// Timer1 Overflow Interrupt Service
ISR(TIMER1_OVF_vect ) {
FreqPeriod:: ocnt++; // count number of timer1 overflows
}
//***************************************************************************
// Analog Comparator Interrupt Service
ISR(ANALOG_COMP_vect ) {
if (!(ACSR & (1<<ACIS0))) { // comparator falling edge
digitalWrite(5,0); // reduce comparator threshold level on AIN0
ACSR |= (1<<ACIS0); // next comparator detection on rising edge
// compute period length timer1 capture value , account timer1 numer of overflows
FreqPeriod::captd= ICR1 + FreqPeriod:: ocnt* 0x10000;
// compute period difference
FreqPeriod::captd=FreqPeriod::captd-FreqPeriod::capta;
FreqPeriod::capta=ICR1; // store capture value
FreqPeriod:: ocnt=0; // reset number of timer1 overflows
FreqPeriod::f_capt=1; // measure ready flag
}
else {
ACSR &= ~(1<<ACIS0); // next comparator detection on falling edge
digitalWrite(5,1); // elevate comparator threshold level on AIN0
}
}
cosa modifico qua dentro ???
Ciao IMer
