internal IOBDResponse <TResult> PerformQuery <TResult>(IOBDCommand <TResult> cmd, bool force = false)
{
lock (_syncLock)
{
//primary API function. Sends commands to the car, and
//protects against sending unsupported commands.
if (Status == OBDStatus.NotConnected)
{
_logger.Error("Query failed, no connection available");
return(OBDResponse <TResult> .Empty);
}
if (!force && !Supports(cmd))
{
_logger.Error($"'{cmd}' is not supported");
return(OBDResponse <TResult> .Empty);
}
// send command and retrieve message
_logger.Debug($"Sending command: {cmd}");
var cmdString = BuildCommandString(cmd);
var messages = _port.SendAndParse(cmdString);
// if we're sending a new command, note it
if (string.IsNullOrWhiteSpace(cmdString))
{
_lastCommand = cmdString;
}
if (messages == null || messages.Length == 0)
{
_logger.Error("No valid OBD Messages returned");
return(OBDResponse <TResult> .Empty);
}
// Trim bytes based on cmd.Bytes size
foreach (var message in messages)
{
message.Data = message.Data.Take(cmd.Bytes).ToArray();
}
var result = cmd.Decoder(messages);
result.Messages = messages;
result.Time = DateTime.UtcNow;
result.Command = cmd;
return(result);
}
}
/// <summary>
/// assembles the appropriate command string
/// </summary>
private string BuildCommandString(IOBDCommand cmd)
{
var cmdString = cmd.Command;
// only wait for as many ECUs as we've seen
if (_port.Config.Fast && cmd.Fast)
{
cmdString += _port.Ecus.Count().ToString(); // TODO: ?? Check this syntax on multi ecu's
}
// if we sent this last time, just send
if (_port.Config.Fast && cmdString == _lastCommand)
{
cmdString = "";
}
return(cmdString);
}
public static int Pid(this IOBDCommand obdCommand)
{
return(Utils.Unhex(obdCommand.Command, 2));
}
public bool Supports(IOBDCommand cmd)
{
return(_supportedCommands.Contains(cmd));
}
public IOBDResponse <TResult> Query <TResult>(IOBDCommand <TResult> cmd, bool force = false)
{
//var cmd = _commands.Get<TCommand, TResult>();
return(PerformQuery(cmd, force));
}
