private async void SendATCmdLocalInternal(XBeeATCommand command, bool responseRequired, byte[] tempCmdId)
{
int headerSize = 0;
int commandSize = 0;
int nbOfBytesToSend = 0;
int offset = 0;
byte[] atCommand = command.ATCommand;
// allocate send buffer
headerSize = COMMAND_PREFIX.Length + sizeof(UInt16);
commandSize = AT_COMMAND_LOCAL_SEND.Length + m_commandId.Length + atCommand.Length;
if (null != command.Payload)
{
commandSize += command.Payload.Length;
}
nbOfBytesToSend = headerSize + commandSize + CHECKSUM_LENGTH;
byte[] buffer = new byte[nbOfBytesToSend];
// add headers
offset = SetCommandHeader(ref buffer, offset, commandSize, ref AT_COMMAND_LOCAL_SEND, ref tempCmdId);
// add payload
offset = AdapterHelper.AddByteToBuffer(ref buffer, ref atCommand, offset);
if (null != command.Payload)
{
byte[] payload = command.Payload;
offset = AdapterHelper.AddByteToBuffer(ref buffer, ref payload, offset);
}
// add checksum
buffer[offset] = CheckSum(ref buffer, headerSize, commandSize);
if (responseRequired)
{
lock (m_locker)
{
// add new awaited response in list
m_pendingATCmdList.Add(tempCmdId[0], command);
}
}
// send command
await m_serialController.WriteAsync(buffer);
Debug.WriteLineIf(Logger.IsVerbose(), "command sent", command.ToString());
}
private bool CheckResponse()
{
bool checkNextResponse = false;
int headerSize = 0;
bool signalResponseReceived = false;
byte[] response = null;
XBeeATCommand atCommand = null;
ZigBeeCommand zigBeeCommand = null;
lock (m_locker)
{
if (COMMAND_PREFIX[0] != m_currentResponse[0])
{
// response buffer is invalid => discard
m_currentResponse = null;
return(checkNextResponse);
}
headerSize = COMMAND_PREFIX.Length + sizeof(UInt16);
if (m_currentResponse.Length <= headerSize)
{
// not enough bytes => wait for more
return(checkNextResponse);
}
// get size of response
int payloadLength = (int)AdapterHelper.UInt16FromXbeeFrame(m_currentResponse, COMMAND_PREFIX.Length);
int fullResponseLength = payloadLength + headerSize + CHECKSUM_LENGTH;
if (m_currentResponse.Length < fullResponseLength)
{
// not enough bytes => wait for more
return(checkNextResponse);
}
// verify checksum
if (IsCheckSumOk(ref m_currentResponse, headerSize, payloadLength + CHECKSUM_LENGTH))
{
// trace Rx buffer to debug output
Logger.TraceRxBuffer(m_currentResponse);
// get frame type
byte frameType = m_currentResponse[headerSize];
// find corresponding command or corresponding notification
if (frameType == AT_COMMAND_LOCAL_RECEIVE[0] ||
frameType == AT_COMMAND_REMOTE_RECEIVE[0])
{
// get command ID
byte commandId = m_currentResponse[headerSize + AT_COMMAND_LOCAL_RECEIVE.Length];
if (m_pendingATCmdList.TryGetValue(commandId, out atCommand))
{
Debug.WriteLineIf(Logger.IsVerbose(), "got response", atCommand.ToString());
// command found => parse response and remove from list
int responseHeaderLength = sizeof(byte) + AT_COMMAND_LOCAL_RECEIVE.Length;
payloadLength -= responseHeaderLength;
response = new byte[payloadLength];
Array.Copy(m_currentResponse, headerSize + responseHeaderLength, response, 0, payloadLength);
atCommand.ParseResponse(response);
RemovePendingATCmd(commandId);
signalResponseReceived = true;
}
else
{
Debug.WriteLineIf(Logger.IsVerbose(), "unmanaged response to AT COMMAND or AT COMMAND notification");
}
}
else if (frameType == EXPLICIT_RX_INDICATOR[0])
{
int responseHeaderLength = sizeof(byte);
payloadLength -= responseHeaderLength;
response = new byte[payloadLength];
Array.Copy(m_currentResponse, headerSize + responseHeaderLength, response, 0, payloadLength);
byte zdoSequenceNumber = m_currentResponse[headerSize + EXPLICIT_RX_INDICATOR.Length + ZigBeeCommand.GetSequenceNumberOffestInZdoFrame()];
byte zclSequenceNumber = m_currentResponse[headerSize + EXPLICIT_RX_INDICATOR.Length + ZigBeeCommand.GetSequenceNumberOffestInZclFrame()];
if ((m_pendingZigBeeCmdList.TryGetValue(zdoSequenceNumber, out zigBeeCommand) && zigBeeCommand.IsZdoCommand)
||
(m_pendingZigBeeCmdList.TryGetValue(zclSequenceNumber, out zigBeeCommand) && !zigBeeCommand.IsZdoCommand))
{
Debug.WriteLineIf(Logger.IsVerbose(), "got response to ZDO or ZCL command", zigBeeCommand.ToString());
zigBeeCommand.ParseResponse(response);
if (zigBeeCommand.IsZdoCommand)
{
RemovePendingZigBeeCmd(zdoSequenceNumber);
}
else
{
RemovePendingZigBeeCmd(zclSequenceNumber);
}
signalResponseReceived = true;
}
else
{
// check if this is an awaited notification
foreach (var notification in m_ZigBeeNotificationList)
{
// "try" parsing response to figure out if it
// correspond to a awaited notification
if (notification.Value.ParseResponse(response))
{
// corresponding notification found
Debug.WriteLineIf(Logger.IsVerbose(), "notification of ZDO or ZCL command", notification.Value.ToString());
break;
}
}
Debug.WriteLineIf(Logger.IsVerbose(), "unmanaged response to ZDO or ZCL command");
}
}
else
{
Debug.WriteLineIf(Logger.IsVerbose(), "received frame OK but not handled");
}
}
// remove response from buffer
ClearResponseBuffer(fullResponseLength);
if (m_currentResponse != null &&
m_currentResponse.Length != 0)
{
checkNextResponse = true;
}
}
if (signalResponseReceived)
{
if (null != atCommand)
{
atCommand.SignalResponseReceive();
}
else if (null != zigBeeCommand)
{
zigBeeCommand.SignalResponseReceive();
}
}
return(checkNextResponse);
}
public byte SendATCmdLocal(XBeeATCommand command)
{
byte[] tempCmdId = NextCommandId();
SendATCmdLocalInternal(command, true, tempCmdId);
return(tempCmdId[0]);
}
public void SendATCmdLocalNoResponse(XBeeATCommand command)
{
byte[] tempCmdId = NextCommandId();
SendATCmdLocalInternal(command, false, tempCmdId);
}