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arduino_universal_serial_ad.../Libraries/Metro/Metro.cpp
2013-04-25 19:53:19 -04:00

74 lines
1.6 KiB
C++
Executable file

#if defined(ARDUINO) && ARDUINO >= 100
#include "Arduino.h"
#else
#include "WProgram.h"
#endif
#include "Metro.h"
Metro::Metro(unsigned long interval_millis)
{
this->autoreset = 0;
interval(interval_millis);
reset();
}
// New creator so I can use either the original check behavior or benjamin.soelberg's
// suggested one (see below).
// autoreset = 0 is benjamin.soelberg's check behavior
// autoreset != 0 is the original behavior
Metro::Metro(unsigned long interval_millis, uint8_t autoreset)
{
this->autoreset = autoreset; // Fix by Paul Bouchier
interval(interval_millis);
reset();
}
void Metro::interval(unsigned long interval_millis)
{
this->interval_millis = interval_millis;
}
// Benjamin.soelberg's check behavior:
// When a check is true, add the interval to the internal counter.
// This should guarantee a better overall stability.
// Original check behavior:
// When a check is true, add the interval to the current millis() counter.
// This method can add a certain offset over time.
char Metro::check()
{
if (millis() - this->previous_millis >= this->interval_millis) {
// As suggested by benjamin.soelberg@gmail.com, the following line
// this->previous_millis = millis();
// was changed to
// this->previous_millis += this->interval_millis;
// If the interval is set to 0 we revert to the original behavior
if (this->interval_millis <= 0 || this->autoreset ) {
this->previous_millis = millis();
} else {
this->previous_millis += this->interval_millis;
}
return 1;
}
return 0;
}
void Metro::reset()
{
this->previous_millis = millis();
}