etl/docs/raw/frameworks/Timer.txt

Timer
Contains definitions common to timers.

struct timer
{
  // Timer modes.
  struct mode
 {
    enum
    {
      SINGLE_SHOT = false,
      REPEATING   = true
    };

    typedef bool type;
  };

  // Timer start status.
  struct start
  {
    enum
    {
      DELAYED   = false,
      IMMEDIATE = true
    };

    typedef bool type;
  };

  // Timer id.
  struct id
  {
    enum
    {
      NO_TIMER = 255
    };

    typedef uint_least8_t type;
  };

  // Timer state.
  struct state
  {
    enum
    {
      INACTIVE = 0xFFFFFFFF
    };
  };
};

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timer
mode
Types
type
The type for timer mode.
Defined as bool

Constants
SINGLE_SHOT
The timer expires once and then stops.

REPEATING
The timer is restarted after every timeout.

start
Types
type
The type for timer start mode.
Defined as bool

Constants
IMMEDIATE
Single Shot
The timer is triggered on the next tick. The normal timeout does not occur.
Repeating
The timer is triggered on the next tick and then on subsequent timeouts.
DELAYED
The timer is triggered on the timeout.

id
Types
type
The type for timer identifiers.
Defined as uint_least8_t

Constants
NO_TIMER
The id of an unregistered timer.