Posted on February 06, 2018 at 03:38Hello.
I am in trouble with connecting virtual comport in STM32 to PC.
I think that the virtual comport is properly working in the MCU, and it is well communicated with TeraTerm (the serial port communication application in PC).
Now, I am coding for serial port in C++ and C# for the comport, but an error or exception occurred with serial port error code 87.
C code.
BuadRate = CBR_115200
ByteSize = 8
fParity = FALSE;
Parity = NOPARITY
StopBits = ONESTOPBIT
bool CSerialPort::configurePort(DWORD BaudRate, BYTE ByteSize, DWORD fParity,
BYTE Parity, BYTE StopBits)
{
if ((m_bPortReady = GetCommState(m_hComm, &m_dcb)) == 0)
{
MessageBox(NULL, 'GetCommState Error', 'Error', MB_OK + MB_ICONERROR);
CloseHandle(m_hComm);
return false;
}
m_dcb.BaudRate = BaudRate;
m_dcb.ByteSize = ByteSize;
m_dcb.Parity = Parity;
m_dcb.StopBits = StopBits;
m_dcb.fBinary = true;
m_dcb.fDsrSensitivity = false;
m_dcb.fParity = fParity;
m_dcb.fOutX = false;
m_dcb.fInX = false;
m_dcb.fNull = false;
m_dcb.fAbortOnError = true;
m_dcb.fOutxCtsFlow = false;
m_dcb.fOutxDsrFlow = false;
m_dcb.fDtrControl = DTR_CONTROL_DISABLE;
m_dcb.fDsrSensitivity = false;
m_dcb.fRtsControl = RTS_CONTROL_DISABLE;
m_dcb.fOutxCtsFlow = false;
m_dcb.fOutxCtsFlow = false;
m_bPortReady = SetCommState(m_hComm, &m_dcb); // <= Error occurs
if (m_bPortReady == 0)
{
CString str1;
str1.Format(_T('%d'), GetLastError());
MessageBox(NULL, str1, 'error', MB_OK);
CloseHandle(m_hComm);
return false;
}
return true;
}
2. C# Code
SerialPort port = new SerialPort('COM2', 115200, Parity.None, 8, StopBits.One);
port.ReadTimeout = 1000;
port.WriteTimeout = 1000;
try
{
port.Open();
}
catch (Exception exp)
{
Console.WriteLine(exp.ToString());
}
