//---------------------------------------------------------------------
// Static members
/// <summary>
/// Examines the current hardware and operation system configuration to
/// determine whether a watchdog timer is available that can be operated
/// by this class. This method returns a watchdog timer instance if
/// this is the case, null otherwise.
/// </summary>
/// <returns>An IWatchDogTimer instance or null.</returns>
internal static IWatchDogTimer Create()
{
try
{
SBC1625IO board;
SBC1625IO.Config config;
if (!SBC1625IO.Present)
{
return(null);
}
config = new SBC1625IO.Config();
config.EnableIO = false;
board = new SBC1625IO();
board.Open(config);
return(new SBC1625WatchDogTimer(board));
}
catch
{
return(null);
}
}
/// <summary>
/// Constructor.
/// </summary>
/// <param name="board">The board driver.</param>
private SBC1625WatchDogTimer(SBC1625IO board)
{
this.board = board;
this.enabled = false;
this.expired = board.WatchDogExpired();
this.rate = board.WatchDogCountRate();
this.timeToReset = TimeSpan.FromSeconds(0xFFFFFFFF / rate);
this.countToReset = 0xFFFFFFFF;
}