1 //==========================================================================
3 // io/watchdog/watchdog.cxx
5 // Watchdog common code
7 //==========================================================================
8 //####ECOSGPLCOPYRIGHTBEGIN####
9 // -------------------------------------------
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38 // -------------------------------------------
39 //####ECOSGPLCOPYRIGHTEND####
40 //==========================================================================
41 //#####DESCRIPTIONBEGIN####
44 // Contributors: nickg
46 // Purpose: Watchdog class implementation
48 //####DESCRIPTIONEND####
50 //==========================================================================
52 #include <pkgconf/system.h> // system configuration file
53 #include <pkgconf/watchdog.h> // configuration for this package
55 #include <cyg/infra/cyg_trac.h> // tracing macros
56 #include <cyg/infra/cyg_ass.h> // assertion macros
58 #include <cyg/hal/drv_api.h> // for locking
60 #include <cyg/io/watchdog.hxx> // watchdog API
61 #include <cyg/io/watchdog.h> // watchdog c-api
63 // -------------------------------------------------------------------------
66 // A static pointer to the single system defined watchdog device.
67 Cyg_Watchdog Cyg_Watchdog::watchdog;
69 // -------------------------------------------------------------------------
73 Cyg_Watchdog::Cyg_Watchdog()
75 CYG_REPORT_FUNCTION();
77 #ifndef CYGSEM_WATCHDOG_RESETS_ON_TIMEOUT
81 // HW driver initialization. This must set the watchdog resolution.
87 // -------------------------------------------------------------------------
88 // Return reset resolution
91 Cyg_Watchdog::get_resolution()
96 #ifndef CYGSEM_WATCHDOG_RESETS_ON_TIMEOUT
97 // -------------------------------------------------------------------------
98 // Trigger the watchdog as if the timer had expired. This should be called
99 // from the driver's ISR.
102 Cyg_Watchdog::trigger()
104 CYG_REPORT_FUNCTION();
108 Cyg_Watchdog_Action *act = action_list;
112 act->action( act->data );
117 cyg_drv_dsr_unlock();
122 // -------------------------------------------------------------------------
123 // Register an action routine that will be called when the timer
127 Cyg_Watchdog::install_action( Cyg_Watchdog_Action *action )
129 CYG_REPORT_FUNCTION();
133 action->next = action_list;
134 action_list = action;
136 cyg_drv_dsr_unlock();
141 // -------------------------------------------------------------------------
142 // Deregister a previously registered action routine.
145 Cyg_Watchdog::uninstall_action( Cyg_Watchdog_Action *action )
147 CYG_REPORT_FUNCTION();
151 Cyg_Watchdog_Action **act_ptr = &action_list;
153 while( 0 != *act_ptr )
155 Cyg_Watchdog_Action *a = *act_ptr;
165 cyg_drv_dsr_unlock();
170 #endif // CYGSEM_WATCHDOG_RESETS_ON_TIMEOUT
172 // -------------------------------------------------------------------------
173 // Implementation of the C-api
178 Cyg_Watchdog::watchdog.start();
184 Cyg_Watchdog::watchdog.reset();
188 watchdog_get_resolution(void)
190 return Cyg_Watchdog::watchdog.get_resolution();
193 // -------------------------------------------------------------------------
194 // EOF io/watchdog/watchdog.cxx