C / C++ / MFC Discussion Boards

Re: serial port communication

RockyJames2-Oct-06 1:09

RockyJames

2-Oct-06 1:09

thank`s for u r support..issuse is closed..i have done..with the commtimeout....

Re: serial port communication

kakan2-Oct-06 0:15

kakan

2-Oct-06 0:15

As Cedric Moonen already said, you can check the DSR signal.
In addition you should raise the RTS (Request To Send) signal and check for the reply from the device, CTS (Clear To Send). If you get a transition from Off to On in the CTS line, you can be pretty sure the device is powered on.

For the serial communication, i suggest you use a serial commuinications library, the are some good ones here at CP.

Alcohol. The cause of, and the solution to, all of life's problems - Homer Simpson

Re: serial port communication

RockyJames2-Oct-06 0:29

RockyJames

2-Oct-06 0:29

hi friend ,can u be more clear.. before ReadFile..i want to know whether system is ON or OFF..can u pls suggest..me the function names to use..

thanks in before
James

Re: serial port communication

kakan2-Oct-06 1:16

kakan

2-Oct-06 1:16

Hello.

The problem with detecting serial devices is that the serial port very often can have a random status when the serial port is unconnected.
I.e. the DSR signal can be in it's "On"-position even when the serial port isn't even connected! (It depends on the hardware).

The only reliable way of detecting if:
1.
There *is* a device conncted.
2.
The device is powered on.

is to catch a transition on one (or more) status lines. An easy way is to ask the device if the PC (Data Terminal) may send data to the DS (Data Set).

If the DS raises it's Clear To Send signal, then the PC(DT) may send data to it.

Check out MSDN for the documentation, http://msdn.microsoft.com/library/default.asp?url=/library/en-us/devio/base/dcb_str.asp[^]

Alcohol. The cause of, and the solution to, all of life's problems - Homer Simpson

Re: serial port communication

RockyJames2-Oct-06 1:10

RockyJames

2-Oct-06 1:10

thank`s for u r support..issuse is closed..i have done..with the commtimeout....

CFont to CMenu

Arman S.1-Oct-06 20:44

Arman S.

1-Oct-06 20:44

How to set a font to application menu; say I've a CFont object & a CMenu ptr..?

Thanks in advance

--
======
Arman

Re: CFont to CMenu

Hamid_RT1-Oct-06 21:04

Hamid_RT

1-Oct-06 21:04

if you have a derived CMenu class you can change your font on WM_DRAWITEM

WhiteSky

Where can I found "convert Singular to Plural" library ?

Zyraph1-Oct-06 19:05

Zyraph

1-Oct-06 19:05

free library (or code) in C++.

Re: Where can I found "convert Singular to Plural" library ?

Waldermort1-Oct-06 22:00

Waldermort

1-Oct-06 22:00

By 'free' do you mean "other peoples hard work so I can be lazy"? or free as in "I don't want to pay even the the author would like a small donation"?

Re: Where can I found "convert Singular to Plural" library ?

Zyraph1-Oct-06 23:07

Zyraph

1-Oct-06 23:07

Just tell me where, pay or free library. I'll consider that I should pay or not later.

jawors1-Oct-06 17:53

jawors

1-Oct-06 17:53

what is source code for email system in Java script Smile | :)

Re: hi

charlieg1-Oct-06 18:20

charlieg

1-Oct-06 18:20

please don't feed the troll.

Charlie Gilley
Will program for food...
Whoever said children were cheaper by the dozen... lied.

My son's PDA is an M249 SAW.
My other son commutes in an M1A2 Abrams

Re: hi

kakan1-Oct-06 20:14

kakan

1-Oct-06 20:14

Why don't you ask someone who knows? This is the Visual C++ / MFC discussion board, in case you haven't noticed.

Alcohol. The cause of, and the solution to, all of life's problems - Homer Simpson

Re: hi

Hamid_RT1-Oct-06 21:05

Hamid_RT

1-Oct-06 21:05

This is a VC++ forum.wrong Smile | :)

WhiteSky

Description of different shortings

frankis781-Oct-06 11:20

frankis78

1-Oct-06 11:20

Hello
Can anyone give me a little short description of the different shortings in visual C++,
And maby give me an example of what they are?

ATL, CLR, GENERAL, SMART DEVICE, WIN 32 APPLICATION..

Thanks for answer

Regards

Re: Description of different shortings

Christian Graus1-Oct-06 15:18

Christian Graus

1-Oct-06 15:18

shortings ?

Where did this list come from ?

ATL is the Active Template Library, for COM
CLR is the .NET framework, C++/CLI apps
When the General talks, you better listen to him
A smart device is a device that is smart, such as a scientific calculator, or a handheld windows device.
Win32 is what all our apps really are, a Win32 app would be an app that doesn't use the CLR, or MFC, it uses the Win32 API directly.

Christian Graus - Microsoft MVP - C++
Metal Musings - Rex and my new metal blog

Re: Description of different shortings

David Crow2-Oct-06 3:21

David Crow

2-Oct-06 3:21

Christian Graus wrote:
shortings ?

When you are longing for something, that means you really want it. When you are shorting for something, I guess that means you don't really want it. Wink | ;)

"Approved Workmen Are Not Ashamed" - 2 Timothy 2:15

"Judge not by the eye but by the heart." - Native American Proverb

Re: Description of different shortings

frankis782-Oct-06 11:00

frankis78

2-Oct-06 11:00

Hi Christian
Thanks for the replay

The reason why i need this information is that i am a chiptuner, that program my own software for car,
and now im going to make software that communicate with the cars mcu..
The language it self is one thing im reading on at moment, but my problem is mostley to know when to use the different settings in visual studio.
The normal standard communication protocoll in car is KWP2000,
I have seen that, many of these communication interfaces that i have uses dll, but i guess i can start building a win32app, that can communicate through an usb-interface, to cars mcu?

Any suggestion where to start?

Regards
Frank

Re: Description of different shortings

Christian Graus2-Oct-06 11:17

Christian Graus

2-Oct-06 11:17

If you want an app running on your PC, which then talks to the car via some communication protocol, you may want to look at using MFC. However, even C# is probably OK on the PC side, the key thing is getting the software right on the car end, which will probably be in C.

Christian Graus - Microsoft MVP - C++
Metal Musings - Rex and my new metal blog

Re: Description of different shortings

frankis782-Oct-06 11:24

frankis78

2-Oct-06 11:24

oki, so then i maby use the mfcapp or mfcdll?

REGARDS
Frank

Re: Description of different shortings

Christian Graus2-Oct-06 11:26

Christian Graus

2-Oct-06 11:26

If you want to write a windows application, then MFC is easier than Win32. A dll is not a program, it's a library. If you want a program that runs, you need to create an exe.

Christian Graus - Microsoft MVP - C++
Metal Musings - Rex and my new metal blog

Re: Description of different shortings

frankis782-Oct-06 11:41

frankis78

2-Oct-06 11:41

Oki
Thanks for youre help Smile | :)

Maby i need more help from you, or i can tune youre car Smile | :)

Regards Frank

Re: Description of different shortings

Christian Graus2-Oct-06 11:47

Christian Graus

2-Oct-06 11:47

*grin* thanks for the offer, but I suspect geography may get in the way of me taking it up...

Christian Graus - Microsoft MVP - C++
Metal Musings - Rex and my new metal blog

Re: Description of different shortings

Hamid_RT1-Oct-06 21:06

Hamid_RT

1-Oct-06 21:06

What do you need?

WhiteSky

LVN_GETDISPINFO and LVIF_DI_SETITEM

Mohammad A Gdeisat1-Oct-06 10:59

Mohammad A Gdeisat

1-Oct-06 10:59

Hi,

I use a CListView as a virtual list in which I display a list of files and file information like size and type.

in the LVN_GETDISPINFO handler I add LVIF_DI_SETITEM to the item mask so that the control will not ask for the data twice for the same item, but it doesnt work at all! the control always asks for data whenever the displayed contents are changed.

I mask the LVIF_DI_SETITEM as follows:

pItem->mask|=LVIF_DI_SETITEM;

and my whole msg handler is as follows if u would like to have a look:

void CFileListView::OnGetdispinfo(NMHDR* pNMHDR, LRESULT* pResult) <br />
{<br />
	LV_DISPINFO* pDispInfo = (LV_DISPINFO*)pNMHDR;<br />
	// TODO: Add your control notification handler code here<br />
	CProdigyExplorerView *pView=(CProdigyExplorerView*)GetParent();<br />
	LV_ITEM* pItem= &(pDispInfo)->item;<br />
	pItem->mask|=LVIF_DI_SETITEM  ;<br />
	int itemid = pItem->iItem;<br />
	*pResult = 0;<br />
	///file info<br />
	CFileFolderInfo *pFI;<br />
	if(itemid > CFileFolderManager::m_Folders.GetUpperBound())<br />
		pFI = (CFileFolderInfo *)CFileFolderManager::m_Files[itemid-CFileFolderManager::m_Folders.GetUpperBound()-1];<br />
	else<br />
		pFI=(CFileFolderInfo *)CFileFolderManager::m_Folders[itemid];<br />
	//////<br />
	if (pItem->mask & LVIF_TEXT)<br />
    {<br />
		if(pView->m_lstFiles.GetHeaderText(pItem->iSubItem)==_T("Filename"))<br />
		{<br />
			wcsncpy(pItem->pszText,pFI->m_Attributes.cFileName,pItem->cchTextMax);<br />
		}<br />
		else if(pView->m_lstFiles.GetHeaderText(pItem->iSubItem)==_T("Size"))<br />
		{<br />
			CString strSize = CFileFolderManager::FormatFileSize(pFI->m_Attributes.nFileSizeHigh,pFI->m_Attributes.nFileSizeLow,0);<br />
			wcsncpy(pItem->pszText, (LPCTSTR)strSize,pItem->cchTextMax);<br />
		}<br />
		else if(pView->m_lstFiles.GetHeaderText(pItem->iSubItem)==_T("Type"))<br />
		{<br />
<br />
		}<br />
		else if(pView->m_lstFiles.GetHeaderText(pItem->iSubItem)==_T("Created"))<br />
		{<br />
			CString strTime = CFileFolderManager::FormatFileTime(pFI->m_Attributes.ftCreationTime,FALSE);<br />
			wcsncpy(pItem->pszText,(LPCTSTR)strTime,pItem->cchTextMax);<br />
		}<br />
		else if(pView->m_lstFiles.GetHeaderText(pItem->iSubItem)==_T("Modified"))<br />
		{<br />
			CString strTime = CFileFolderManager::FormatFileTime(pFI->m_Attributes.ftLastWriteTime,FALSE);<br />
			wcsncpy(pItem->pszText,(LPCTSTR)strTime,pItem->cchTextMax);<br />
		}<br />
		else if(pView->m_lstFiles.GetHeaderText(pItem->iSubItem)==_T("Accessed"))<br />
		{<br />
			CString strTime = CFileFolderManager::FormatFileTime(pFI->m_Attributes.ftLastAccessTime,FALSE);<br />
			wcsncpy(pItem->pszText,(LPCTSTR)strTime,pItem->cchTextMax);<br />
		}<br />
	}<br />
<br />
	//////////////////////////////////////////<br />
	//////////ICONS////////////////////////<br />
	if( pItem->mask & LVIF_IMAGE) <br />
    {<br />
	<br />
		if(pView->m_iLVStyle != LVS_ICON)<br />
		{<br />
			if(pFI->m_iSmallIconIndex!=-1)<br />
			{<br />
				pItem->iImage=pFI->m_iSmallIconIndex;<br />
				return;<br />
			}<br />
			int iIconIndex;<br />
			CString strExtension=CFileFolderManager::GetFileExtension((CString)pItem->pszText);<br />
			if((iIconIndex=pView->GetTypeIconSmall(strExtension))==-1	//no icon in the list<br />
				|| strExtension==_T("exe") ||strExtension==_T("lnk")|| pFI->m_Attributes.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)<br />
			{<br />
				SHFILEINFO fi;<br />
				SHGetFileInfo(pView->m_strCurrentPath + pItem->pszText,pFI->m_Attributes.dwFileAttributes,&fi,sizeof(fi),SHGFI_USEFILEATTRIBUTES |SHGFI_ICON| /*SHGFI_TYPENAME|*/SHGFI_SMALLICON);<br />
				<br />
				pItem->iImage=pView->m_ilLVIconsSmall.Add(fi.hIcon);<br />
				<br />
				pView->m_hIcons.Add(fi.hIcon);<br />
				pFI->m_iSmallIconIndex = pItem->iImage;<br />
				if(!(pFI->m_Attributes.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY))//store extension if not a folder<br />
				{<br />
					IconType IT;<br />
					IT.m_Extension=strExtension;<br />
					IT.m_IconIndex=pItem->iImage;<br />
					pView->m_IconTypeSmall.Add(IT);<br />
				}<br />
				<br />
			}<br />
<br />
			else	//This file type already has an icon index in m_IconType<br />
			{<br />
				pItem->iImage=iIconIndex;<br />
				pFI->m_iSmallIconIndex = iIconIndex;<br />
			<br />
			}<br />
			CString str;<br />
			str.Format(_T("%d"),pView->m_ilLVIconsSmall.GetImageCount());<br />
			GetParent()->GetParent()->SetWindowText(str);<br />
		<br />
		}//end of small icon handler<br />
		if(pView->m_iLVStyle == LVS_ICON)<br />
		{<br />
			if(pFI->m_iLargeIconIndex!=-1)<br />
			{<br />
				pItem->iImage=pFI->m_iLargeIconIndex;<br />
				return;<br />
			}<br />
			<br />
			int iIconIndex;<br />
			CString strExtension=CFileFolderManager::GetFileExtension((CString)pItem->pszText);<br />
			if((iIconIndex=pView->GetTypeIconLarge(strExtension))==-1	//no icon in the list<br />
				|| strExtension==_T("exe") ||strExtension==_T("lnk")|| pFI->m_Attributes.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)<br />
			{<br />
				IconType IT;<br />
				IT.m_Extension=strExtension;<br />
				SHFILEINFO fi;<br />
				<br />
				SHGetFileInfo(pView->m_strCurrentPath + pItem->pszText,pFI->m_Attributes.dwFileAttributes,&fi,sizeof(fi),SHGFI_USEFILEATTRIBUTES |SHGFI_ICON| /*SHGFI_TYPENAME|*/SHGFI_LARGEICON);<br />
				<br />
				IT.m_IconIndex=pItem->iImage=pView->m_ilLVIconsLarge.Add(fi.hIcon);<br />
				pView->m_IconTypeLarge.Add(IT);<br />
				pView->m_hIcons.Add(fi.hIcon);<br />
				pFI->m_iLargeIconIndex= IT.m_IconIndex;<br />
				<br />
			}<br />
<br />
			else	//This file type already has an icon index in m_IconType<br />
			{<br />
				pItem->iImage=iIconIndex;<br />
				pFI->m_iLargeIconIndex= iIconIndex;<br />
			<br />
			}<br />
			CString str;<br />
			str.Format(_T("%d"),pView->m_ilLVIconsLarge.GetImageCount());<br />
			GetParent()->GetParent()->SetWindowText(str);<br />
		<br />
		}//end of small icon handler<br />
		<br />
	}

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