scheduler.h

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#ifndef LIBPROPELLER_SCHEDULER_H_
#define LIBPROPELLER_SCHEDULER_H_


#ifndef UNIT_TEST
#include <propeller.h>
#endif

#ifdef UNIT_TEST
#define CNT unit_CNT
#define CLKFREQ unit_CLKFREQ
extern unsigned volatile int unit_CNT;
extern unsigned volatile int unit_CLKFREQ;
#endif

class Scheduler {
public:

    Scheduler(const int deci_hz) {
        period_ticks_ = GetTicksPerPeriod(deci_hz);
        start_CNT_ = CNT;
    }

    bool Run(void) {
        if ((CNT - start_CNT_) >= period_ticks_) {
            start_CNT_ += period_ticks_;
            return true;
        } else {
            return false;
        }
    }

    static unsigned int GetTicksPerPeriod(const int deci_hz) {
        return (CLKFREQ * 10) / deci_hz;
    }

private:
    unsigned int next_read_time_;
    unsigned int start_CNT_;
    unsigned int period_ticks_;
};

#endif // LIBPROPELLER_SCHEDULER_H_