TimerOne库的源代码

以下是TimerOne库的源代码，可用于Arduino开发板：

/*
  TimerOne.h - Version: Latest
  A better Timer Library for Arduino.
  Created by Jesse Tane, April 13, 2010.
  Released into the public domain.
*/

#ifndef TimerOne_h_
#define TimerOne_h_

#include <inttypes.h>

// 16MHz clock = 62.5ns tick
// 65535 * 62.5ns = 4.096ms
#define RESOLUTION 4 // 4 ms tick, minimum delay

// This is the number of timer clock ticks per microsecond
#define clockCyclesPerMicrosecond()  (F_CPU / 1000000L)
#define clockCyclesToMicroseconds(a) ((a) / clockCyclesPerMicrosecond())
#define microsecondsToClockCycles(a) ((a) * clockCyclesPerMicrosecond())

class TimerOne
{
  public:
    void initialize(long microseconds=1000000);
    void attachInterrupt(void (*isr)());
    void detachInterrupt();
    void start();
    void stop();
    void restart();
    void resume();
    void setPeriod(long microseconds);
    inline void setPwmDuty(char pin, int duty) __attribute__((always_inline));
    inline unsigned long getPeriod() __attribute__((always_inline));
    inline unsigned long getPwmDuty(char pin) __attribute__((always_inline));
  private:
    static unsigned long _timer_period;
    static void (*_userFunc)();
};

extern TimerOne Timer1;

#endif

该库提供了一系列函数，可以方便地设置定时器，附加、分离中断，以及设置PWM占空比等。在使用前需要将该库添加到Arduino IDE的库目录中，并在代码中引用。