/// <summary>
/// Gets the state of the specified channel.
/// </summary>
/// <param name="vars">The state of the device.</param>
/// <param name="channel">Specifies what channel to fetch.</param>
/// <returns>The state of the specified channel.</returns>
public static SmcChannelVariables getChannel(this SmcVariables vars, SmcChannel channel)
{
switch (channel)
{
case SmcChannel.Analog1: return(vars.analog1);
case SmcChannel.Analog2: return(vars.analog2);
case SmcChannel.Rc1: return(vars.rc1);
case SmcChannel.Rc2: return(vars.rc2);
default: throw new Exception("Unknown Channel: " + channel.ToString());
}
}
/// <summary>
/// Returns true if the specified channel is a limit or kill switch and
/// it is currently active. This information comes from the limitStatus
/// register.
/// </summary>
public static bool switchActive(this SmcVariables vars, SmcChannel channel)
{
switch (channel)
{
case SmcChannel.Analog1: return((vars.limitStatus & SmcLimitStatus.Analog1) != 0);
case SmcChannel.Analog2: return((vars.limitStatus & SmcLimitStatus.Analog2) != 0);
case SmcChannel.Rc1: return((vars.limitStatus & SmcLimitStatus.Rc1) != 0);
case SmcChannel.Rc2: return((vars.limitStatus & SmcLimitStatus.Rc2) != 0);
default: throw new Exception("Unknown Channel: " + channel.ToString());
}
}
/// <summary>
/// Gets the current state of the device.
/// </summary>
public unsafe SmcVariables getSmcVariables()
{
SmcVariables vars = new SmcVariables();
try
{
// Note: In later versions of this software, this function should have
// arguments that allow you to specify which of these flags to set.
// For now, just set all of them, meaning that this request will clear
// error occurred flags and clear the current chopping occurrence count.
UInt16 flags = 3;
controlTransfer(0xC0, (byte)SmcRequest.GetVariables, flags, 0, &vars, (UInt16)sizeof(SmcVariables));
}
catch (Exception exception)
{
throw new Exception("There was an error reading variables from the device.", exception);
}
return(vars);
}