Serial comm over BT serial port does not work?

[eminemence]

Hi,
I am just trying to monitor the Bt serial port for any activity.
Later I want to read and write data over it.
This code does the same,but nothing happens,it just keeps on waiting
for event to take place.I am sending a file using the BT dongle and
expect this code to work when the file transfer happens.
Can somebody pls point out what am I doing wrong.
Thanks in advance.
--eminemence.
:

#define BT_PORT_NUM "COM3"

HANDLE hCommHandle;
OVERLAPPED ovp;
DWORD dWtEvent;
DWORD WINAPI CommReadThread (LPVOID lpvoid);
void show_menu()
{
	printf("\n\t\t1. Start Discovery");
	printf("\n\t\t2. Exit.");
	printf("\n\t\tSelect choice : ");
}

int OpenPort(char* portNum)
{
	if(portNum!=NULL){
		hCommHandle = CreateFile(portNum,
								GENERIC_READ| GENERIC_WRITE,
								0,
								0,
								OPEN_EXISTING,
								NULL,
								0);
		if(hCommHandle == INVALID_HANDLE_VALUE){
			printf("\n\t\tError : Error opening port...");
			return false;
		}
		else{
			printf("\n\t\tOpening port...success..");
			return true;
		}
	}
	else
		printf("\n\t\tError : Invalid port number...");
	return false;
}

void WriteToPort()
{
	
}

void StartBtDiscovery()
{
	if(OpenPort(BT_PORT_NUM)){
		DCB dcb;
		if (!GetCommState (hCommHandle, &dcb)){
			printf("\n\t\tError1 : GetCommState error.");
			return;
		}
		
		dcb.BaudRate = CBR_9600;     // set the baud rate
		dcb.ByteSize = 8;             // data size, xmit, and rcv
		dcb.Parity = NOPARITY;        // no parity bit
		dcb.StopBits = ONESTOPBIT;    // one stop bit

		if (!SetCommState (hCommHandle, &dcb)){
			printf("\n\t\tError1 : SetCommState error.");
			return;
		}


		COMMTIMEOUTS timeOuts;
		timeOuts.ReadIntervalTimeout			= 0;
		timeOuts.ReadTotalTimeoutConstant		= 0;
		timeOuts.ReadTotalTimeoutMultiplier		= 0;
		timeOuts.WriteTotalTimeoutConstant		= 0;
		timeOuts.WriteTotalTimeoutMultiplier	= 0;

		if(!SetCommTimeouts(hCommHandle,&timeOuts)){
			printf("\n\t\tError : Comm port init error.");
			return;
		}
		else{
			printf("\n\t\tSuccess setting comm timeout...");
			if(SetCommMask(hCommHandle, EV_CTS | EV_DSR)){
				//comm mask setting success..
				ovp.hEvent = CreateEvent(
										NULL,   // no security attributes 
										FALSE,  // auto reset event 
										FALSE,  // not signaled 
										NULL    // no name 
										);
				printf("\n\t\tWaiting for some event..");
				while(WaitCommEvent(hCommHandle, &dWtEvent, &ovp)) 
				{
					printf("\n\t\tSome event on port....");
					if (dWtEvent & EV_DSR){
						printf("\n\t\tDSR event flagged...");
					}
					if (dWtEvent & EV_CTS){
						printf("\n\t\tCTS event flagged...");
					}
				}
			}
			else{
				printf("\n\t\tError : Comm port mask init error.");
				return;
			}
		}
	}
	printf("\n\t\tError : Error in opening port..");
	return;
}

int main(int argc, char* argv[])
{
	char ch;
	while(1){
		show_menu();
		ch = getchar();
		switch(ch){
			case '1':
				StartBtDiscovery();
			break;
			case '2':
				exit(0);
			break;
		}
	}
	return 0;
}

[ideru]

From what I see, your are just opening the port. If you want to read and write to it, I think u need to use ReadFile and WriteFile method.

[MrViggy]

What's a "Bt serial port?"

Viggy

[MrViggy]

Forget that, I just found out that by "BT" you mean BlueTooth!

Sorry!!!

Viggy

[drewdaman]

what kind of BT device aer you using?