CPU.hh

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#ifndef COSA_CPU_HH
#define COSA_CPU_HH

#include "Cosa/Types.h"

class CPU {
public:
  static uint8_t clock_prescale(uint8_t factor)
  {
    if (UNLIKELY(factor > 4)) factor = 4;
    uint8_t res = CLKPR;
    synchronized {
      CLKPR = _BV(CLKPCE);
      CLKPR = factor;
    }
    return (res);
  }

  static uint32_t clock_freq()
  {
    return (F_CPU >> CLKPR);
  }

private:
  CPU() {}
};

#endif