Write an array to Serialport visual c++ - visual-c++-2012

Question

I am writing a program to communicate via RS232 from the PC to a microchip.
I am use to C#, but I started using Visual C++.
I get the following error:
IntelliSense: no instance of overloaded function "System::IO::Ports::SerialPort::Write" matches the argument list argument types are: (RTC_Visual::uint8 [27U], int,RTC_Visual::uint8)
I wrote the command to write to the serial port as follows:
serialPort1->Write(TxStruct.u8_Buffer, 0, TxStruct.Message.u8_Length);
please can someone tell me what am I doing wrong and or what is the correct structure for the serialport->write method.
thanks in advance

Answer 1

Not very clear from your question; showing a bit of code would help.
Seems that the parameter TxStruct.u8_Buffer does not match either the expected Byte[] or Char[]
I imply by the dot (.) that TxStruct is not managed?
The following works:
SerialPort ^myport=gcnew SerialPort;
//configures the port --ptr is a class that interacts with the user
myport->PortName="COM"+ptr->getportnumber();
myport->BaudRate=ptr->getbauds();
myport->DataBits=ptr->getdatab();
myport->StopBits=ptr->getstopb();
myport->Parity=ptr->getparity();
myport->WriteBufferSize=4096;
myport->RtsEnable=false;
myport->ReceivedBytesThreshold=256;
myport->WriteTimeout = 500;
String^ datatowrite="Data to write";
array<Byte>^ mybytes= Encoding::UTF8->GetBytes(datatowrite);
try
{
myport->Open();
myport->Write(mybytes,0,mybytes->Length);
}
catch (Exception^ e)
{
//error
MessageBox::Show( e->Message, "Port Error",
MessageBoxButtons::OK, MessageBoxIcon::Exclamation );
}
The above encodes to UTF8 as I deduct from the parameter TxStruct.u8_Buffer.
Beware of the length of the buffer you are using and the WriteBufferSize property of the serial port. Also, a too long buffer with a handshake XonXoff might result in a timeout exception.
Hope this helps.
All the best,
Adan