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MicroController Connection

Cindy O

Any one know how my program should be like when i need to pass in information for example "a" and display it in a display box... through serial communication.

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  • 0 in reply to Cindy O

    MSDN has examples of serial communication programming on a Win32 platform.

    There are hundreds upon hundreds of Win32 programming websites on the internet, however Keil's Discussion Forum is not among them.

    My Usenet news server lists 2111 Microsoft-related newsgroups.

    Given all of that, I think your time would be much better spent inquiring about PC-related topics on PC-related venues, and not here, but that's just my opinion.

  • 0 in reply to Cindy O

    know how to send 80h to the microcontroller and returning 55H??

    This does, for a change, sound like an uC problem

    HOWEVER, we here are willing to HELP you, but not to do it for you.

    post YOUR code and help will be forthcoming.

    Erik

  • 0 in reply to Cindy O

    "how to send 80h to the microcontroller"

    That is a PC programming excercise - eg, MSVC - for which you need to find a PC programming forum

    "and returning 55H??"

    Now you need a microprocessor system (both hardware and software) to receive the 80H and send a 55H.

    Look at the CSAMPLE example in your Keil\C51\examples\ folder - it illustrates receiving data and sending responses on the 8051 serial port.

  • 0 in reply to Andy Neil

    erm... i did the codings... its like this...

    
void CSerialComm::Send(HANDLE *pComm, CString str)
{
	unsigned char StopByte=0x1;
	unsigned long int n_out;

	str = "0x80";
	WriteFile(*pComm, str, str.GetLength(),&n_out , NULL);
	WriteFile(*pComm, &StopByte, 1, &n_out, NULL);
}

void CSerialComm::Receive(HANDLE *pComm, CString str1)
{
	char cRxByte;
	DWORD dwRead;

	while(cRxByte!=0x1)
	{
		ReadFile(*pComm, &cRxByte, 1, &dwRead, NULL);
		str1+=cRxByte;
	}
	MessageBox("Acknowledge Received");
	//	MessageBox(str1);
}

void CSerialComm::initComm(HANDLE *pComm)
{
//	HANDLE hComm;

//	hComm = CreateFile( "COM1:",
//                    GENERIC_READ | GENERIC_WRITE,
//                    0,
//                    0,
//                    OPEN_EXISTING,
//                    FILE_FLAG_OVERLAPPED,
//                  0);
//	if (hComm == INVALID_HANDLE_VALUE)
//	{
//	}
   // error opening port; abort



	*pComm = CreateFile("COM1:", GENERIC_WRITE|GENERIC_READ, 0, NULL, OPEN_EXISTING, 0, NULL);
	if (*pComm ==INVALID_HANDLE_VALUE)
	{
		//MessageBox("Please input value !");
	}

	//FillMemory(&dcb, sizeof(dcb), 0);
	dcb.DCBlength = sizeof(dcb);
	dcb.BaudRate = CBR_9600;
	dcb.fBinary = TRUE;
	dcb.fDtrControl = DTR_CONTROL_DISABLE;
	dcb.fRtsControl = RTS_CONTROL_DISABLE;
	dcb.ByteSize = 8;
	dcb.Parity = NOPARITY;
	dcb.StopBits = ONESTOPBIT;

	if (!SetCommState(*pComm, &dcb))
	{
		//MessageBox("Wrong Port");
	}
}

    it can be executed without connecting the mc. but after the mc is connected, the program hangs

    can tell me wats wrong...

  • 0 in reply to Cindy O

    "tell me wats wrong..."

    You're asking in the wrong forum, that's what's wrong!

    That's PC code - so you need to ask about it in a PC forum!

    What have you done to debug it?
    MSVC includes a debugger!

  • 0 in reply to Cindy O

    Yes indeed it's the wrong forum. However I could send you a functionnal sample so at least you could try to solve your micro-controller communications problems with people sharing there knowledge on this forum (however HyperTerminal is enough for this purpose...). For this I need an e-mail.

    Jean-Pierre