C / C++ / MFC

5-Oct-05 4:29

I need to write a program to send data to com port with 8bit characters.
(0x00 - 0xFF)
But I can only use CString as 7 bits ANSI.
Please tell me how to use CString as 8 bits!
Thank you very much!

C^hris L^osinger5-Oct-05 4:36

C^hris L^osinger

5-Oct-05 4:36

you can't.

Cleek | Image Toolkits | Thumbnail maker

toxcct5-Oct-05 4:51

toxcct

5-Oct-05 4:51

Chris Losinger wrote:
you can't.

WTF | :WTF:

you uderstood the question ???? Poke tongue | ;-P

TOXCCT >>> GEII power
[toxcct][VisualCalc]

Bob Stanneveld5-Oct-05 6:15

Bob Stanneveld

5-Oct-05 6:15

Hello,

CString uses 8 bits! A byte is 8 bits and CString uses no less... If you want to specify values other than the visible characters, you should call GetBufferSetLength(new length). This will retrieve a pointer to the internal character buffer. Manipulate it as required (using code>unsigned char's and a lot of casting. Then call ReleaseBuffer() and make sure that there are no null terminators in the buffer, but only one on the end.

This is a dirty hack that you should not use, but use a BYTE buffer or

unsigned char<code> buffer instead!<br />
<br />
Hope this helps :) <br />
<br />
Behind every great black man...<br />
            ... is the police. - Conspiracy brother<br />
<br />
<br />
<a href="http://www.codeproject.com/script/profile/whos_who.asp?id=418947&id=418947&df=100&forumid=27215&exp=6&select=1050632">Blog</a>[<a href="http://www.codeproject.com/script/profile/whos_who.asp?id=418947&id=418947&df=100&forumid=27215&exp=6&select=1050632" target="_BLANK">^</a>]

LaHaHa5-Oct-05 12:21

5-Oct-05 12:21

Hello,

I need to use CString because I use the VT_BSTR of VARIANT for using com port.
So could you tell me how to solve this problem or other method to do the com port program?
Please help!

Many thanks,
Alex

Roger Stoltz5-Oct-05 21:04

Roger Stoltz

5-Oct-05 21:04

Hi Alex,

Try the following:

VARIANT var;<br />
CString str = "My serial data";<br />
var.vt = VT_BSTR;<br />
var.bstrVal = str.AllocSysString();

There's a lot written about serial programming here: http://www.codeproject.com/system/#Hardware+programming[^]

Hope this helps
--
Roger

LaHaHa5-Oct-05 22:54

5-Oct-05 22:54

Hi
Now I can send the data to com port in binary form,

CByteArray btArray;
int total;
total=GetDlgItemInt(IDC_EDIT1,NULL,TRUE);
btArray.Add(total);
COleVariant var(btArray);
m_comm.SetOutput(var);
VariantClear(&var);

but I can't receive in correct way.
Please help!

Roger Stoltz5-Oct-05 23:32

Roger Stoltz

5-Oct-05 23:32

Alex Hon wrote:
I can't receive in correct way
What does this mean? Who is the receiver?

If you're having trouble with VARIANTs and MsCommCtrl, describe them.
What does the vt field in the VARAINT union say about how the data should be interpreted?

--
Roger

LaHaHa6-Oct-05 1:01

6-Oct-05 1:01

Hi Roger,

For example, I send the data is 0x8f (binary is 10001111).
I check the data in the line is 0x8f.
But I will get a 0x01 in VARIANT in receiving PC.
If the data is between 0x00 to 0x7f, it will be correct.
Please help!

Roger Stoltz6-Oct-05 1:26

Roger Stoltz

6-Oct-05 1:26

You need to change the mode of the MsCommCtrl from text to binary.
Also be careful when calling GetInput how the VARIANT union should be interpreted. I suspect that the binary data will be a SafeArray.

I always write my own serial port handler since I consider the MsCommCtrl to be slow, to limiting and not very well documented to say the least.
E.g. you can have COM ports from COM1 to COM255 in the OS, but MsCommCtrl can only handle COM1 to COM16. Connect som devices such as a mobile phone, BlueTooth dongle and you easily get more than 15 ports.

Hope this helps
--
Roger

LaHaHa6-Oct-05 16:17

Exception 0xE06D7363 Problem?

6-Oct-05 16:17

Thank you very much!
By using SafeArray.. , the receiving part is working now.
Thank you very much again!

bosfan5-Oct-05 4:26

bosfan

5-Oct-05 4:26

Hallo Community,
does anyone have experience with Exception 0xE06D7363, when run in debug modus, the output window shows this message:
First-chance exception in LinkChek.exe (KERNEL32.DLL): 0xE06D7363: Microsoft C++ Exception.

and i dont know what kind of error is this??? Confused | :confused:

thanks for help
break;

Re: Exception 0xE06D7363 Problem?

Bob Stanneveld5-Oct-05 6:17

Bob Stanneveld

5-Oct-05 6:17

Hello,

You probably screwed something up in an API call. Some of the parameters might have incorrect values. It is impossible for me to say what is wrong from this point of view. Try to step into the debugger and see when the exception occurs, post more info on this later.

Behind every great black man...
... is the police. - Conspiracy brother

Blog[^]

Re: Exception 0xE06D7363 Problem?

bosfan5-Oct-05 21:17

bosfan

5-Oct-05 21:17

Hello Bob,
thank you for answer, i try to debug step by step, maybe i can find the point where is error created, and i post a pease of code here!
regards
break;

German Umlaute in .tlh File

MarcoNedwig5-Oct-05 3:40

MarcoNedwig

5-Oct-05 3:40

Importing a dll which was has an enum with a German Umlaut (like 'ä') makes no problems using Visual Studio .Net 2003, but causes Visual C++ 6 to an error (error C2018) which means 'unknown character'. So the .tlh file is generated within every build I have no chance to modify it. Even setting this file to read-only causes the compiler to make problems. Does anyone know a solution for Visual C++ 6 to make the dll work e.g. a setting in the project ( Win32 MFC Project Dialog based) ?

Editing Standard/Object Libraries...

Milby0075-Oct-05 3:13

Milby007

5-Oct-05 3:13

Hi!!

I'm trying to figure out a way of removing symbols from a standard library. I've only been able to extract whole object modules from the library at the commandline like so:

lib name.lib /extract:module.obj /out:result.obj

or remove entire object modules like so:

lib name.lib /remove:module.obj /out:result.lib

I'm trying to remove a DllMain implementation from the library because I need to create my own in the dll that uses the library. I get linker errors saying that i've got a multiply defined symbol i.e. _DllMain@12 (similar to what you'd expect). I can't remove the object module that contains it because it also contains symbols that i need.

Does anyone have any idea how to get around this? I may be going about it all wrong!?

Thanks!!

Bartosz Bien5-Oct-05 3:24

Bartosz Bien

5-Oct-05 3:24

Why not encapsulating the DLL instead of messing around? You'll most probably receive an updated version of the file with the next Service Pack, and you'll need to do the work again. I'd rather write my own DLL that simply calls the standard one, are there any obstacles here?

Regards,
BB
http://spin.bartoszbien.com

Milby00711-Oct-05 0:04

Milby007

11-Oct-05 0:04

there are a few 3rd party libraries (.lib's) that either perform the linking / mapping to symbols in dlls, or actually contain code. the library that actually contains code (that i need) also contains the DllMain, but as i mention, i really need to implement my own DllMain. So in other words my own dll encapsulates functionality provided by the other dlls AND libraries, but i can't dynamically link to all symbols, because they're actually provided within a .lib.

is there any way of extracting/removing symbols from .lib's/.obj's that i need/don't want?

Bartosz Bien12-Oct-05 9:48

Bartosz Bien

12-Oct-05 9:48

This is interesting. Do unused symbols link statically to your application?

Regards,
BB
http://spin.bartoszbien.com