Real-Time Programming Languages - Operating Systems
Real-Time Programming Languages - Operating Systems
Real-Time Programming Languages - Operating Systems
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Example: Watchdog<br />
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protected Watchdog is<br />
pragma Interrupt_Priority (Interrupt_Priority'Last);<br />
entry Alarm_Control;<br />
-- Called by alarm handling task.<br />
procedure Call_In;<br />
-- Called by application code every 50ms if alive.<br />
procedure <strong>Time</strong>r(Event : in out Timing_Event);<br />
-- <strong>Time</strong>r event code, ie the handler.<br />
private<br />
Alarm : Boolean := False;<br />
end Watchdog;<br />
Fifty_Mil_Event : aliased Timing_Event;<br />
TS : <strong>Time</strong>_Span := Milliseconds(50);<br />
Set_Handler(Fifty_Mil_Event, TS, <strong>Time</strong>r);<br />
Burns,<br />
Wellings<br />
Ch. 15.2<br />
Page 364 f.<br />
WS 2013/14 <strong>Real</strong>-<strong>Time</strong> <strong>Systems</strong>, <strong>Real</strong>-<strong>Time</strong> Prog. <strong>Languages</strong> / Hermann Härtig 44
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