This provides a basic Watchdog service, and includes a startup detection to determine if the reset was caused by the WD. Add support for Nucleo board
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Diff: Watchdog.h
- Revision:
- 0:7a316f14da9c
- Child:
- 1:5a1ff72b5915
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/Watchdog.h Sun Mar 20 23:22:50 2011 +0000 @@ -0,0 +1,81 @@ +/// @file Watchdog.h provides the interface to the Watchdog module +/// +/// This provides basic Watchdog service for the mbed. You can configure +/// various timeout intervals that meet your system needs. Additionally, +/// it is possible to identify if the Watchdog was the cause of any +/// system restart. +/// +/// Adapted from Simon's Watchdog code from http://mbed.org/forum/mbed/topic/508/ +/// +/// @note Copyright © 2011 by Smartware Computing, all rights reserved. +/// This software may be used to derive new software, as long as +/// this copyright statement remains in the source file. +/// @author David Smart +/// +#ifndef WATCHDOG_H +#define WATCHDOG_H +#include "mbed.h" + +/// Watchdog provides the interface to the Watchdog feature +/// +/// example: +/// @code +/// Watchdog wd; +/// +/// ... +/// main() { +/// if (wd.WatchdogCausedReset()) +/// pc.printf("Watchdog caused reset. WD being armed for 30s cycle.\r\n"); +/// +/// wd.Configure(30.0); // sets the timeout interval +/// for (;;) { +/// wd.Service; // kick the dog before the timeout +/// @endcode +/// +class Watchdog { +public: + /// Create a Watchdog object + /// + /// example: + /// @code + /// Watchdog wd; // placed before main + /// @endcode + Watchdog(); + + /// Configure the timeout for the Watchdog + /// + /// This configures the Watchdog service and starts it. It must + /// be serviced before the timeout, or the system will be restarted. + /// + /// example: + /// @code + /// ... + /// wd.Configure(1.4); // configure for a 1.4 second timeout + /// ... + /// @endcode + /// + /// @param timeout in seconds, as a floating point number + /// @returns none + /// + void Configure(float timeout); + + /// Service the Watchdog so it does not cause a system reset + /// + /// @returns none + void Service(); + + /// WatchdogCausedReset identifies if the cause of the system + /// reset was the Watchdog + /// + /// example: + /// @code + /// if (wd.WatchdogCausedReset())) { + /// @endcode + /// + /// @returns true if the Watchdog was the cause of the reset + bool WatchdogCausedReset(); +private: + bool wdreset; +}; + +#endif // WATCHDOG_H \ No newline at end of file