C / C++ / MFC

Re: How can I monitor the cts pin of serial port using dcb

5-Sep-07 20:06

Can any one suggest me some ways to monitor the cts pin of the serial port using DCB.

S.Yamini

chandu0045-Sep-07 20:26

chandu004

5-Sep-07 20:26

i have worked very enough with serial port(RS 232).
but never heard of the cts pin and dcb.
atleast for my information please educate me regarding those.
then i will try to solve if it in my perview.
thanku.

Re: How can I monitor the cts pin of serial port using dcb

yaminisridaran5-Sep-07 20:30

Re: How can I monitor the cts pin of serial port using dcb

5-Sep-07 20:30

I am using vc++ 6.0 for serial port communication. dcb is structure defines the control setting for a serial communications device.
I have to monitor the cts (Clear to send)pin of the serial port.

S.Yamini

chandu0045-Sep-07 20:51

chandu004

5-Sep-07 20:51

I use PCOMM library for sending and receiving data using serial port.
functions are like
sio_ioctl(); to define the port settings.
sio_read();
sio_write();
soi_iqueue();to find weather any data is there in the port.
may be i can help you if you are also using these libraries and functions.

Re: How can I monitor the cts pin of serial port using dcb

QuickDeveloper5-Sep-07 20:41

QuickDeveloper

5-Sep-07 20:41

yaminisridaran wrote:
Can any one suggest me some ways to monitor the cts pin of the serial port using DCB.

i think u need to set fOutxCtsFlow flag of the DCB to TRUE to monitor the CTS signal.

"Every morning I go through Forbes list of 40 richest people in the world. If my name is not in there, I go to work..!!!"

Re: How can I monitor the cts pin of serial port using dcb

yaminisridaran5-Sep-07 20:43

Re: How can I monitor the cts pin of serial port using dcb

5-Sep-07 20:43

I have set fOutxCtsFlow to true but it is always true even if the voltage level in cts pin changes.

S.Yamini

Cedric Moonen5-Sep-07 20:50

Cedric Moonen

5-Sep-07 20:50

Take a look at functions like GetCommModemStatus[^], WaitCommEvent[^] or GetCommMask[^]

Cédric Moonen
Software developer

Charting control [v1.2]

Re: How can I monitor the cts pin of serial port using dcb

yaminisridaran5-Sep-07 20:56

Re: How can I monitor the cts pin of serial port using dcb

5-Sep-07 20:56

I already using GetCommState.

My Code
CString strPort;
strPort.Format("COM%d:",1);
m_hPort=CreateFile(strPort,GENERIC_READ|GENERIC_WRITE,0,NULL,OPEN_EXISTING,0,NULL);
if(m_hPort==INVALID_HANDLE_VALUE)
{
return false;
}

GetCommState(m_hPort,&dcb);

BOOL res;
dcb.fOutxCtsFlow=true;
res=SetCommState(m_hPort,&dcb);
// Configure serial port
GetCommState(m_hPort,&dcb);

if(dcb.fOutxCtsFlow==TRUE)
TRACE("TURNED OFF");
else if(dcb.fOutxCtsFlow==FALSE)
{
TRACE("TURNED ON");
}
dcb.fOutxCtsFlow is always true even the voltage level changes

S.Yamini

Cedric Moonen5-Sep-07 20:59

Cedric Moonen

5-Sep-07 20:59

Did you read my message ? Where do I speak about GetCommState ? I even gave you the link to the documentation, did you have a look at them ?

Cédric Moonen
Software developer

Charting control [v1.2]

Using MFC to access the internet

D_code_writer5-Sep-07 19:43

D_code_writer

5-Sep-07 19:43

Hey guys,

I develop applications using MFC and Visual C++ 6 and I am working on a particular application that needs to access data over the internet.

Can I do this using the MFC Framework or am I better just biting the bullet and get myself up to speed with Visual C# 2005?

Best Regards

Danny Nowlan

Hamid_RT5-Sep-07 20:20

Hamid_RT

5-Sep-07 20:20

See CInternetFile Class.

ThatsAlok6-Sep-07 5:19

ThatsAlok

6-Sep-07 5:19

whitesky????

Hamid_RT6-Sep-07 7:26

Hamid_RT

6-Sep-07 7:26

Yeah thats right,;) Hi Alok how are you?
I think its better I use of my name and also without any sig very simple.

ThatsAlok5-Sep-07 23:33

ThatsAlok

5-Sep-07 23:33

Danny Nowlan wrote:
http://www.codeproject.com/internet/amhttputils.asp

http://www.codeproject.com/internet/amhttputils.asp[^]

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow
Never mind - my own stupidity is the source of every "problem" - Mixture

cheers,
Alok Gupta
VC Forum Q&A :- I/IV
Support CRY- Child Relief and You

INT_PTR

nitin35-Sep-07 19:32

5-Sep-07 19:32

can anyone tell me what is INT_PTR ?

thanks

Michael Dunn5-Sep-07 19:39

Michael Dunn

5-Sep-07 19:39

A signed integral type that is the same size as a pointer. So 4 bytes in Win32, 8 bytes in Win64.

--Mike--
Visual C++ MVP Cool | :cool:

LINKS~! Ericahist | PimpFish | CP SearchBar v3.0 | C++ Forum FAQ

I work for Keyser Söze

nitin35-Sep-07 20:19

5-Sep-07 20:19

same size as a pointer, but its not a pointer. correct ? Confused | :confused:

toxcct6-Sep-07 1:19

toxcct

6-Sep-07 1:19

you got it...

it's simply badly named. but it's an int...

[VisualCalc][Binary Guide][CommDialogs] | [Forums Guidelines]

CD ROM open close problem

David Crow6-Sep-07 3:32

David Crow

6-Sep-07 3:32

How about pressing F12 on it, or at least open basetsd.h and search for it?

"A good athlete is the result of a good and worthy opponent." - David Crow

"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

p_5-Sep-07 19:22

5-Sep-07 19:22

hi all vc++ masters \
i use this code for cd rom open and close
but this gives

'OpenVolume' : local function definitions are illegal
'OpenVolume' : cannot convert parameter 1 from 'char [3]' to 'char'
This conversion requires a reinterpret_cast, a C-style cast or function-style cast

NOTE:the line contain stars shows errors;

DWORD IOCTL_STORAGE_EJECT_MEDIA;
DWORD bytesreturned;
HANDLE OpenVolume(TCHAR cDriveLetter)
****{HANDLE hVolume;
UINT uDriveType;
TCHAR szVolumeName[8];
TCHAR szRootName[5];
DWORD dwAccessFlags;

wsprintf(szRootName, szRootFormat, cDriveLetter);

uDriveType = GetDriveType(szRootName);
switch(uDriveType) {
case DRIVE_REMOVABLE:
dwAccessFlags = GENERIC_READ | GENERIC_WRITE;
break;
case DRIVE_CDROM:
dwAccessFlags = GENERIC_READ;
break;
default:
_tprintf(TEXT("Cannot eject. Drive type is incorrect.\n"));
return INVALID_HANDLE_VALUE;
}

wsprintf(szVolumeName, szVolumeFormat, cDriveLetter);

hVolume = CreateFile( szVolumeName,
dwAccessFlags,
FILE_SHARE_READ | FILE_SHARE_WRITE,
NULL,
OPEN_EXISTING,
0,
NULL );
if (hVolume == INVALID_HANDLE_VALUE)
ReportError(TEXT("CreateFile"));

return hVolume;
}
*****HANDLE hVolume = OpenVolume("D:");DeviceIoControl( hVolume, IOCTL_STORAGE_EJECT_MEDIA, NULL, 0, NULL, 0, &bytesreturned, NULL );
thanks

special thanks to MR Naveen

nitin35-Sep-07 20:07

5-Sep-07 20:07

//the first error may be caused by placing function OpenVolume inside of another funtion.
//the second is, TCHAR cDriveLetter means just pass a single charecter (Driveletter ie, 'D' )

//DWORD IOCTL_STORAGE_EJECT_MEDIA allready defined in winioctl.h
DWORD bytesreturned ;
TCHAR szRootFormat[5] = {"%c:\\" } ;
TCHAR szVolumeFormat[9] = {"\\\\.\\%c:" } ;

HANDLE OpenVolume( TCHAR cDriveLetter )
{
HANDLE hVolume;
UINT uDriveType;
TCHAR szVolumeName[8];
TCHAR szRootName[5];
DWORD dwAccessFlags;

wsprintf(szRootName, szRootFormat, cDriveLetter);

uDriveType = GetDriveType(szRootName);

switch(uDriveType)
{
case DRIVE_REMOVABLE:
dwAccessFlags = GENERIC_READ | GENERIC_WRITE;
break;

case DRIVE_CDROM:
dwAccessFlags = GENERIC_READ;
break;

default:
_tprintf(TEXT("Cannot eject. Drive type is incorrect.\n"));

return INVALID_HANDLE_VALUE;
}

wsprintf(szVolumeName, szVolumeFormat, cDriveLetter);

hVolume = CreateFile( szVolumeName ,
dwAccessFlags,
FILE_SHARE_READ | FILE_SHARE_WRITE,
NULL,
OPEN_EXISTING,
0,
NULL );

if ( hVolume == INVALID_HANDLE_VALUE )
{
_tprintf(TEXT("Error Creatfile ") ) ;
}

return hVolume ;
}

int _tmain(int argc, _TCHAR* argv[])
{
HANDLE hVolume = OpenVolume( 'D' ) ; //TCHAR Stands for a single charecter
DeviceIoControl( hVolume, IOCTL_STORAGE_EJECT_MEDIA, NULL, 0, NULL, 0, &bytesreturned, NULL );

return 0;
}

p_5-Sep-07 20:23

5-Sep-07 20:23

thanks sir
i us this code as u specify but problem is now as:
errors:
'OpenVolume' : local function definitions are illegal
main' : local function definitions are illegal

i use whole code inside this :

void CInoutDlg::OnButton3()

now please tell me where am i wrong
thanks

nitin35-Sep-07 20:41

5-Sep-07 20:41

u should not place the HANDLE OpenVolume( TCHAR cDriveLetter ) definsion insde of "void CInoutDlg::OnButton3()" because this is another function, one function definition cant be place inside of another one.

//so put the code here
HANDLE OpenVolume( TCHAR cDriveLetter )
{
...
}

void CInoutDlg::OnButton3()
{
//call OpevVolume
HANDLE hVolume = OpenVolume( 'D' ) ; //TCHAR Stands for a single charecter
DeviceIoControl( hVolume, IOCTL_STORAGE_EJECT_MEDIA, NULL, 0, NULL, 0, &bytesreturned, NULL );
}