Timers

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Detailed Description

Timer library, set reset and check expiry of timers.

Init library at CPU reset with Timers_Init.

Use Timer_Set, Timer_Reset, Timer_HasExpired and Timer_MillisecondsLeft in main program loop.

Call Timers_DecreaseAll from timer interrupt. Resolution will be equal to the update value used when updating the timers.

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Files

• file Kopia av timers.c
• file Kopia av timers.h
• file timers.c
• file timers.h

Typedefs

• typedef unsigned short int Milliseconds_t
• typedef unsigned char TimerId_t
• typedef unsigned short int Milliseconds_t
• typedef unsigned char TimerId_t

Functions

• void Timers_Init (void)
• unsigned char Timers_GotoToIdle (void)
• bool Timer_HasExpired (const TimerId_t TimerId)
• void Timer_Reset (const TimerId_t TimerId)
• void Timer_Set (const TimerId_t TimerId, const Milliseconds_t Timeout)
• Milliseconds_t Timer_MillisecondsLeft (const TimerId_t TimerId)
• void Timer_SetExpired (const TimerId_t TimerId, const Milliseconds_t Timeout)

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Typedef Documentation

typedef unsigned short int Milliseconds_t

Timer value is in milliseconds.

typedef unsigned char TimerId_t

Id of an timer.

typedef unsigned short int Milliseconds_t

Timer value is in milliseconds.

typedef unsigned char TimerId_t

Id of an timer.

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Function Documentation

void Timers_Init (  void   )

Init timer library, reset all timers Must be called before any other timer functions are called

unsigned char Timers_GotoToIdle (  void   )

Wait for timers to be updated before going to power save Call this function before going to power save

bool Timer_HasExpired (  const TimerId_t  TimerId  )

Returns status of a timer Parameters: TimerId  Id of timer Return values: !0  if timer has expired 0  if timer has not expired

void Timer_Reset (  const TimerId_t  TimerId  )

Resets a timer Resets and cancels a timer Parameters: TimerId  Id of timer

void Timer_Set (  const TimerId_t  TimerId, const Milliseconds_t  Timeout )

Starts timer Starts timer, if timer is already running it will be set with new timeout. Parameters: TimerId  Id of timer Timeout  Milliseconds before timer expires

Milliseconds_t Timer_MillisecondsLeft (  const TimerId_t  TimerId  )

Returns milliseconds before timer expires Parameters: TimerId  Id of timer Returns: Milliseconds left before timer expires, 0 if timer is not running

void Timer_SetExpired (  const TimerId_t  TimerId, const Milliseconds_t  Timeout )

Start a timer. It will expire immediatly but still have a timeout after first expiry. Parameters: TimerId  Id of timer Timeout  Milliseconds per

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