C / C++ / MFC

How to send/receive raw data to/from USB

25-Sep-07 1:42

For the resizing, look up CRectTracker

It provides the pieces needed for moving or resizing a rectangular object. You still have to provide some of the plumbing but it gets the job done.

Mohammad A Gdeisat24-Sep-07 16:34

Mohammad A Gdeisat

24-Sep-07 16:34

Hi all,

I have a board (embedded device) that send RAW data over USB to the PC, it also expects to receive some data and commands from USB, anybody knows how to write a program to send data from PC to USB and receive data from USB to PC?? any samples, articles or any kind of help is appreciated..

Thank you very much

Mohammad Gdeisat

And ever has it been that love knows not its own depth until the hour of separation

Re: How to send/receive raw data to/from USB

Cedric Moonen24-Sep-07 20:32

Cedric Moonen

24-Sep-07 20:32

USB doesn't work the same way as standard serial port (COM port) work. You cannot open the USB and send/receive data on it.
Instead, ýou'll need to open the driver associated with your device (using CreateFile) and then you'll be able to read/write data (using ReadFile/WriteFile) to your device. You'll be also be able to send specific command codes to your driver using DeviceIOControl.

Normally, you should have received documentation with your board (and the driver also). Everything should be explained ther (because for example IO control codes are specific to the driver).

Cédric Moonen
Software developer

Charting control [v1.2]

program runs and correct results, however, error messagr

mrby12324-Sep-07 11:13

Re: program runs and correct results, however, error messagr

24-Sep-07 11:13

Please help to figure out what is wrong with my program. It runs and yield correct results. The program is a hybrid of MFC and C++. After the program finish display the results and then when I hit the exit key I Got:

Loaded 'ntdll.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\kernel32.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\user32.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\gdi32.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\comdlg32.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\shlwapi.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\advapi32.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\rpcrt4.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\msvcrt.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\comctl32.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\shell32.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\winspool.drv', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\oledlg.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\ole32.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\olepro32.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\oleaut32.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\imm32.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\lpk.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\usp10.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\WinSxS\x86_Microsoft.Windows.Common-Controls_6595b64144ccf1df_6.0.2600.2180_x-ww_a84f1ff9\comctl32.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\entapi.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\psapi.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\netapi32.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\MSCTF.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\SynTPFcs.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\version.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\MSCTFIME.IME', no matching symbolic information found.
First-chance exception in blast_vib_proc.exe: 0xC0000005: Access Violation.
The program 'C:\blast_vib_proc_model_from_d\Debug\blast_vib_proc.exe' has exited with code 0 (0x0).

Please let me know where is the problem and how to fix it.

Thanks a lots.

Mark Salsbery24-Sep-07 11:20

Re: program runs and correct results, however, error messagr

24-Sep-07 11:20

There's no errors until the first-chance exception. If that exception isn't handled
then the app will terminate. If the exception is handled, it may or may not be fine,
depending on what code is causing the exception and how it's being handled.
In other words, if the exception is occurring in your code, you may want to look into it.

Mark

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

mrby12324-Sep-07 12:06

Re: program runs and correct results, however, error messagr

24-Sep-07 12:06

Thanks Mark.

It seems that Exit function and Next Function got these errors because when I hit these buttons I got the message and program terminates.

Thanks again for any ideas.

Mark Salsbery24-Sep-07 12:24

Re: program runs and correct results, however, error messagr

24-Sep-07 12:24

If you run the application in the debugger, execution will break when the exception occurs.

You should at that point be able to see the offending line(s) of code.

If the exception didn't occur in your code, you can use the call stack window to
trace back to a point in your code and hopefully find the problem.

Mark

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

mrby12324-Sep-07 13:02

Re: program runs and correct results, however, error messagr

24-Sep-07 13:02

Thanks Mark.

I followed your suggestion with break point and I got to Exit function and the program terminated. Here is my Exit function. please see if anything wrong. Thanks again.

//---------------------------------------------
void CBlast_vib_procDlg::OnExit()
{
// TODO: Add your control notification handler code here
//
CDialog::OnCancel();
}
//

here is message map:

BEGIN_MESSAGE_MAP(CBlast_vib_procDlg, CDialog)
//{{AFX_MSG_MAP(CBlast_vib_procDlg)
ON_WM_SYSCOMMAND()
ON_WM_PAINT()
ON_WM_QUERYDRAGICON()
ON_BN_CLICKED(IDNext, Next)
ON_BN_CLICKED(IDExit, OnExit)
//}}AFX_MSG_MAP
END_MESSAGE_MAP()

Mark Salsbery24-Sep-07 15:19

Re: program runs and correct results, however, error messagr

24-Sep-07 15:19

Nothing that should cause an exception there.

Do you get an unhandled exception error or does it just terminate
as expected?

Mark

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

mrby12324-Sep-07 16:47

Re: program runs and correct results, however, error messagr

24-Sep-07 16:47

Thanks Mark. I do get error message:
The application encountered a problem and needs to close.WHen I hit the debug button in the message, I got:
"he instruction at "0x0048d044" referenced memory at "0x61746596", the memory could not be "written",Click on OK to terminate the program.

Thanks again

Mark Salsbery24-Sep-07 16:52

what kind of search is recommended???

24-Sep-07 16:52

Looks like a bad pointer. I couldn't possibly guess where and/or how it's getting trashed.

Some debugging is needed! Smile | :)

Mark

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

pblais24-Sep-07 10:51

24-Sep-07 10:51

I have to do what, seems to me, is a binary search.

I have different hardware modules "out on the buss" each with its own unique 17 character ascii serial number. Initially, I don't know each's serial number and until I do, I can't communicate with them. I am going to scale down my example to 3 modules each with a 4 character wide alphanumeric (in real life each character can be any of the printable ascii characters)serial number.
Here would be the 3 units and their serial numbers..

Module # Serial #
1 ABG5
2 ABN4
3 BFT9

The way the hardware and software interface works is like this.

If I ask for any serial number starting with 'A', I will get a reply.. But I don't know how many yet.
If I ask for any serial number starting with 'B', the same holds true.
If I ask for any serial number starting with any other character other than 'A' or 'B', I don't get "a hit". Now, I can eliminate any serial numbers that don't start with the letters 'A' or 'B'

Now, I ask for serial numbers starting with 'AA' through 'AZ...A9' and get "hits" for 'AB' only.
I also run through any serial numbers starting with 'BA' through 'BZ...B9' and get one "hit" for 'BF'
This time, I eliminate anything that doesn't start with 'AB' or 'BF'

Each time I get "a hit" I don't know how many. Until I "drill" my way down through all four characters. At some point I will have only "one hit" for each of the serial numbers.

Nowwwwwwwwwwwwwwwwwwwwww.... How can I do this in Visual C++?????

As I mentioned above, I think this would be a binary search. But I am having a hard time figuring out how to "keep score" of the "non-hits" so that I don't waste time trying those on future iterations. Keeping in mind that each serial number is 17 characters wide and can be made up of any of the 95 printable ascii characters

Are there any code snippets that I can "stitch" together to do this....

Thank you in advance
Pierre

Waldermort24-Sep-07 19:16

Waldermort

24-Sep-07 19:16

Sounds to me like a binary tree would do what you want. Once you have found the first node, starting with the letter "A", use that node then to find the next highest, either "B" or "AD".

Waldermort

pblais25-Sep-07 4:17

25-Sep-07 4:17

WalderMort wrote:
Sounds to me like a binary tree would do what you want. Once you have found the first node, starting with the letter "A", use that node then to find the next highest, either "B" or "AD".

The more I look at this the more I am no so sure that this is a binary-tree search. A binary-tree search implies that the tree exists and you are searching through it. In my application, I don't think the tree exists. I am creating it right????

Waldermort25-Sep-07 4:40

Waldermort

25-Sep-07 4:40

I re-read you origional post and realized that my reply may have been a little wrong.

From what I understand you are applying a brute force attack on the driver to gather the serial numbers?

I would suggest you create a function which given a string will append the characters A-9 and call your driver. If you get a hit, call your function again with the new string ( complete with appended character ). This is a similar way to how files are found on a drive.

Something like this:

void RecurseSearch( LPTSTR szID )<br />
{<br />
    TCHAR szSearch[ 128 ];<br />
    <br />
    // append the characters one at a time ( do this in a loop )<br />
    _tcscpy( szSearch, szID );<br />
    _tcscat( szID, "A" );<br />
    <br />
    // check if its a hit<br />
    if ( SomeUnknowFunction( szIdSearch ) )<br />
    {<br />
        // Call again until max length is achieved and it's a hit<br />
        RecurseSearch( szSearch );<br />
    }<br />
}

Waldermort

pblais25-Sep-07 7:26

25-Sep-07 7:26

Exactly what I am looking for...
Something that "finds" filenames
YESSSSSSSSSS

pblais3-Oct-07 8:50

Sorry if wrong location. Trying to open unknown video type for processing.

3-Oct-07 8:50

Welllllllllll
I got side-tracked and now I am finally getting back to this. I was able to use a kind-of brute force recursive search. Using my example, it goes through and finds ABG5. I have also figured out a way to keep track of that. My question now is, how can I have it remember to go back and continue searching from ABxx to find ABN4 and eventually BFT9?

Thanks in advance
Pierre

Code Monkey Mike24-Sep-07 10:41

Code Monkey Mike

24-Sep-07 10:41

I am trying to create an application which requires me to open videos taken from an assortment of cameras, both digital still cameras taking motion pictures and standard video camera. As you are probably well aware, each camera has its own type of file storage format. From my research I have found the four most common types that cameras will save video as being mpeg-1, mpeg-2, QuickTime .mov and .avi. From that list you can already see a problem with QT .mov being proprietary.

The functionality I need in any sort of interface with the videos is very simple.
1. Open the file
2. Grab each frame of the video one at a time
2.a. Allow me to do whatever I want to the data because I will not be altering the file in any way
3. Close the file

I will be doing processing on the actual video data (image matrix). I have tried using both the QuickTime API for this application, as well as the Video for Windows API. I began using OpenCV for video access, but it does not have the capabilities I require. According to VFW, if the codec is registered, the API will interface with the video, but that does not seem to be the case with the .mpg file I am testing the interface out on. Windows Media Player and QuickTime both play the video, and I downloaded GSpot, a codec detection algorithm, and know the correct codec is available, but alas...

What I am getting at is that I need a suggestion as to how to accomplish this task.
Do any of you have any suggestions? I would really appreciate it.

The code for processing the video, developed using a .mov converted to a .avi format, is about 80% complete, I just need this interfacing to be able to complete it.

I reject your reality and substitute my own. Adam Savage - MythBusters

Ctrl Shift F9 will clear all breakpoints in VC 6.0 , however

Vaclav_24-Sep-07 6:00

Vaclav_

24-Sep-07 6:00

Ctrl Shift F9 will clear all breakpoints in VC 6.0 , however.... being lazy and keyboard challenged I am asking the forum these questions and hoping for some answers.

1. You can add "remove all bookmarks" in Tools->Customize->Commands->Edit
But I cannot find similar icon "Remove all breakpoints"

Side note - why does one need to click on icon to find out what it does?
How about plain vanilla list instead of this “bearware” icon happy approach?

2. You can right click in edit pane gray left border area to manipulate breakpoints.
How can one add, “Remove all breakpoints” to this popup?
Actually – where can you edit this popup anyway?

3. The “Remove all” button is in Breakpoint dialog – why not anywhere else?

4. Years ago there was a macro or Add-in to accomplish this (remove all breakpoints) but of course I forgot where I found it.

Cheers
Vaclav

Re: Ctrl Shift F9 will clear all breakpoints in VC 6.0 , however

Maximilien24-Sep-07 7:21

Maximilien

24-Sep-07 7:21

in VC6, you can use ctrl-B to open the breakpoint dialog; there you can remove all break points.

Maximilien Lincourt
Your Head A Splode - Strong Bad

CRectTracker static linking

bob1697224-Sep-07 5:58

Re: CRectTracker static linking

24-Sep-07 5:58

I am using CRectTracker in an MFC 7.1 app and noticed that it works correctly when linking with "shared" MFC but if I "statically" link to MFC, the Cursor disappears when I move the mouse over any of the handles.

I checked an old app that was written in MFC 4.2 and linked "statically" to that MFC and CRectTracker misbehaves as well. It works correctly when linking to "shared" MFC.

Is anyone familiar with this problem and do you know of any workarounds?

Mark Salsbery24-Sep-07 6:36

Re: CRectTracker static linking

24-Sep-07 6:36

Try adding this to your resource (.rc) file

#include "afxres.rc"

If it's already there, make sure you don't have _AFX_NO_TRACKER_RESOURCES
defined somewhere.

Mark

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

bob1697224-Sep-07 7:31

graphics in c++ console program

24-Sep-07 7:31

Damn your good!

It's working now.

Thanks for taking the time out to help.

Sai Yasodharan24-Sep-07 5:58

Sai Yasodharan

24-Sep-07 5:58

hi,

i tried to execute the following program(which was given in turbo c++ documentation) in vc++. but it gives an error, that graphics.h can't be found.

so i copied that graphics.h from turbo c to the vc++'s include folder. now it is showing many errors, which i can't resolve(i even don't understand these errors). i am studying c++ in my college. our syllabus include everything from file handling to all oops concepts. but graphics is not covered in out syllabus. so i decided to learn it on my own. but don't know how to start

someone help me please

the following code works perfectly in turbo c, but not in vc++

<br />
#include <graphics.h><br />
#include <stdlib.h><br />
#include <stdio.h><br />
#include <conio.h><br />
<br />
int main(void)<br />
{<br />
   /* request auto detection */<br />
   int gdriver = DETECT, gmode, errorcode;<br />
   int xmax, ymax;<br />
<br />
   /* initialize graphics and local variables */<br />
   initgraph(&gdriver, &gmode, "");<br />
<br />
   /* read result of initialization */<br />
   errorcode = graphresult();<br />
   /* an error occurred */<br />
   if (errorcode != grOk)<br />
   {<br />
      printf("Graphics error: %s\n", grapherrormsg(errorcode));<br />
      printf("Press any key to halt:");<br />
      getch();<br />
      exit(1);<br />
   }<br />
<br />
   setcolor(getmaxcolor());<br />
   xmax = getmaxx();<br />
   ymax = getmaxy();<br />
<br />
   /* draw a diagonal line */<br />
   line(0, 0, xmax, ymax);<br />
<br />
   /* clean up */<br />
   getch();<br />
   closegraph();<br />
   return 0;<br />
}<br />

Known is a Drop, UnKnown is an Ocean
More about me at http://in.geocities.com/slagio2002/me.html

Re: graphics in c++ console program

bob1697224-Sep-07 6:06