# SFBAlarm.h File Reference

Support for time-based events. More...

`#include "SFBTypes.h"`
`#include "SFBWiring.h"`

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## Data Structures
class | SFBAlarm
| Manage "alarm clock"-style settable timers. More...
## Defines
#define | SFBALARM_QUEUE_SIZE 51
| The maximum number of alarms.
## Typedefs
typedef void(* | SFBAlarmHandler )(u32 when)
| A function pointer type that can be called when an alarm is triggered.
typedef void(* | SFBAlarmArgHandler )(u32 when, void *arg)
| A function pointer type that can be called when an alarm is triggered.
typedef u8 | SFBAlarmIndexType
| grows (at least) as (14 bytes * SFBALARM_QUEUE_SIZE).
## Variables
class SFBAlarm | Alarms
| Manage "alarm clock"-style settable timers.

## Detailed Description

Support for time-based events.

Author:
  David H. Ackley.

Date:
  (C) 2009 All rights reserved.

Code License:
  The GNU Lesser General Public License

License Note:
  All code samples shown in documentation are placed into the public domain.

## Define Documentation

#define SFBALARM_QUEUE_SIZE 51

The maximum number of alarms.

The RAM footprint of an SFBAlarm

## Typedef Documentation

typedef void(* SFBAlarmArgHandler)(u32 when, void *arg)

A function pointer type that can be called when an alarm is triggered.

This is the more powerful of the such funtion pointer types; see SFBAlarmArgHandler for the more limited type.

typedef void(* SFBAlarmHandler)(u32 when)

A function pointer type that can be called when an alarm is triggered.

This is the simpler of the such funtion pointer types; see SFBAlarmArgHandler for the more complicated type.

typedef u8 SFBAlarmIndexType

grows (at least) as (14 bytes * SFBALARM_QUEUE_SIZE).

The type of an alarm index. u8 suffices unless SFBALARM_QUEUE_SIZE exceeds 255