C / C++ / MFC

Anonymous15-Aug-05 22:28

15-Aug-05 22:28

Hello Mr. Cedric Moonen,
Thanks a lot for help. I am using Mitsubishi micro controller M16C/62P. If there is any ready communication code is available on any of the sites, I need not reinvent the wheel. Can you advise any?
Thanks and best regards,
Paresh

Cedric Moonen15-Aug-05 22:52

Cedric Moonen

15-Aug-05 22:52

Ok, but it's a USB micro-controller ? So, what drivers are supplied with the micro-controller ? What's specified in their documentation ?
Can you give the link to the product so I can have a look (I search on google but there was too much different results).

Anonymous16-Aug-05 7:42

16-Aug-05 7:42

Hello Mr. Cedrric Moonen,
http://www.renesas.com/fmwk.jsp?cnt=usb_family_landing.jsp&fp=/products/mpumcu/usb_device/
This is the link. In the search option at the top, enter "M16C/62P" and click on Go button. It will display a table. Search for "M30624FGPFP" in the last column. In that row, click on the "PDF". You will be presented with the data sheet, hardware manual and software manual for the product.
They have FOUSB as a tool to do the flash programming. But I donot want to use that tool. I want to implement the data transfer using C/C++. First stage for this is to write the driver or use the existing communication driver available. then next stage is to send the frames via USB. Can you tell me where can i get the ready made communication driver or source code for that?
Thanks in advance and best regards,
Paresh

prcarp12-Aug-05 8:15

prcarp

12-Aug-05 8:15

We used the USBHIDAPI.DLL from www.kadtronix.com[^] and had very good luck with it. If you know what the bytes are coming from the device and can parse it yourself, then you're all set. We used it for a special joystick (HID device, not game device) to read analog X, Y, and Z values and the DLL was very responsive. We could also send info to it to calibrate it. It is compatible with VC++ and VB and comes with .lib and .dll libraries

ThatsAlok12-Aug-05 19:09

ThatsAlok

12-Aug-05 19:09

Paresh emb wrote:
How to communicate with a micro controller using USB port?

How can I access USB port (COM 5)?[^]

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

cheers,
Alok Gupta
VC Forum Q&A :- I/ IV

Nautilus Master13-Aug-05 0:54

Nautilus Master

13-Aug-05 0:54

There's an easy way to communicate with usb devices. With build in usb device io you're not really able to write to usb devices easily.
Just install the libusb drivers which has a filesize of about 1/7 MB. There are alreay src samples delivered with this package. You just need to know what you would like to send to the device.

Anonymous11-Sep-05 4:18

Re: USB Communication Src

11-Sep-05 4:18

Can I know where is the website for this libusb driver?

I downloaded and install the files from
http://libusb-win32.sourceforge.net/#support

1) libusb-win32-filter-bin-0.1.10.1.exe
2) libusb-win32-src-0.1.10.1.tar.gz
3)libusb-win32-device-bin-0.1.10.1.tar.gz

I could not find any documentation to link it with
visual C ++ . Can anyone advise me? Or link me to one
documentation?

THere is error whenever i try to use the data
structure in libusb.

Thanks

cheers
Dingyao

Nautilus Master11-Sep-05 4:40

Nautilus Master

11-Sep-05 4:40

Just a sample for libusb libusb-win32-filter-bin-0.1.8.0.exe

To enumerate all webcams connected to your usb port..... looks a bit messy here Wink | ;)

1)

struct usb_bus *bus;
struct usb_device *dev;

usb_init();
usb_find_busses();
usb_find_devices();

for (bus = usb_get_busses(); bus; bus = bus >next)
{
for (dev = bus->devices; dev; dev = dev->next)
{
usb_dev_handle *udev;
if (!((dev->descriptor.idVendor==PRODUCT_VENDOR_ID) && (dev->descriptor.idProduct == PRODUCT_ID)))
continue;

udev = usb_open(dev);
if (udev)
{
..... Do something here
usb_close (udev);
}

}

// ---------------------------------------------

To send something to the usb device ....

buf[0] = pan & 0xff;
buf[1] = (pan>>8) & 0xff;
buf[2] = tilt & 0xff;
buf[3] = (tilt>>8) & 0xff;

usb_control_msg(udev, XX, XX, XX, XX, buf, X, XX);

..where XX is device specific

-- modified at 12:28 Wednesday 14th September, 2005

ON_WM_CREATE() Definition

LiYS12-Aug-05 1:23

LiYS

12-Aug-05 1:23

I'm puzzled by ON_WM_CREATE() macro's definition

{ WM_CREATE, 0, 0, 0, AfxSig_is, \
		(AFX_PMSG)(AFX_PMSGW)(int (AFX_MSG_CALL CWnd::*)(LPCREATESTRUCT))&OnCreate }

I know that the text in bold is a pointer to CWnd's function, and I know the statement after the last period is the "routine to call", But I don't quite understand what the statement trying to accomplish, Is it just a cast for function OnCreate? D'Oh! | :doh:

Bob Stanneveld12-Aug-05 2:39

Bob Stanneveld

12-Aug-05 2:39

Hello,

First, why do you wan't to know how the message macro's work?

I created a thread class, that also has a message map and the following explanation comes from my experiance.

The message map of MFC is an array of structs. These structs have one general pointer to a message. (Casting back to the right form is done using signatures.)

The statement is casting a function pointer to a general pointer used by the the message map of MFC. This is done in multiple steps, since you cannot cast it directly. The compiler will complain heavily about casting function pointers. For this reason it is first casted to a base class member function pointer. Second it is casted to an intermediate type and finally it is casted to the general type.

I hope this helps. Big Grin | :-D

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

Blog[^]

Anonymous12-Aug-05 3:45

12-Aug-05 3:45

Bob Stanneveld wrote:
First, why do you wan't to know how the message macro's work?

Out of curiosity, and what's more I'm trying to understand how my dialog based class hear the Windows calling, such that I'm not take for granted everytime I put a message macro in my class!Your reply did help!
Thanks Bob!;)

LiYS12-Aug-05 4:21

LiYS

12-Aug-05 4:21

How to fetch the columns from a table using vc++ CRecordSet

Bob Stanneveld12-Aug-05 4:59

Bob Stanneveld

12-Aug-05 4:59

You're welcome Big Grin | :-D

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

Blog[^]

Tooltips in VS .NET 2003

Ulrich12-Aug-05 1:02

Ulrich

12-Aug-05 1:02

Dear all,

I have a problem in Visual Studio .NET 2003 about implementing tooltips for dialog based controls e.g. buttons migrating from Visual Studio 6.0 which drives me crazy. In VS 6.0 the tooltips work without any problem for all controls using the method listed below:

void ...:: OnInitDialog()
{ ...
EnableToolTips (TRUE);
... };

ON_NOTIFY_EX(TTN_NEEDTEXT, 0, OnToolTipNotify)

BOOL ...::OnToolTipNotify (UINT id, NMHDR* pNMHDR, LRESULT* pResult)
{
// Tooltip Daten holen
TOOLTIPTEXT *pTTT = (TOOLTIPTEXT*) pNMHDR;

// ID des sendenden Dialogelementes holen
UINT nID = pTTT->hdr.idFrom;

...}

If I compile and link the source code using .NET 2003 Professional the tooltips appear for some controls, and for some controls NOT. I don't know why. I found that for some controls the message handler OnToolTipNotify will be started, for some controls not. I could check it setting a break point.

Is there any solution for this problem known ? Thanks for all help.

Ulrich

G.Radhakrishna12-Aug-05 0:10

G.Radhakrishna

12-Aug-05 0:10

Hi all,

iam working in vc++, i want to fetch the columns from a table.

CDatabase db;
CRecordset myset(&db);
myset.open(CRecordset::snapshot,"Select *from mytable");

this my code. Here error is

"No columns were bound prior to calling SQLFetchScroll/SQLExtendedFetch"

so what is it mean. Mytable contains 4 rows and two columns

how can i slove this problem...........
plz help me

Re: How to fetch the columns from a table using vc++ CRecordSet

Cedric Moonen12-Aug-05 1:31

Cedric Moonen

12-Aug-05 1:31

I had this error before and I think I solved it by opening the recordset with the CRecordset::dynaset option:

myset.open(CRecordset::dynaset,"Select *from mytable");<br />

But I'm not sure anymore, so don't blame me if this doesn't work Wink | ;)

iocp threads exit

Michael Olsen11-Aug-05 23:54

Michael Olsen

11-Aug-05 23:54

Hello all,

I am using iocp in an application that routes frames between
clients.
However the threads in the iocp framework continue to exit (Return code: 0x0). Confused | :confused:

Can anyone throw any ideas of what can make them do this?

In advance thanks.

Michael Olsen

Re: iocp threads exit

geo_m13-Aug-05 21:36

geo_m

13-Aug-05 21:36

Difficult to say with such a level of info I have. But when I assume that you implemented the iocp correctly, it can be that you simply end the thread proc. somewhere - forgotten return, uncatched exception whatever like that

Displaying Jpeg image in a dialog box

jj92111-Aug-05 23:52

jj921

11-Aug-05 23:52

I am trying to show jpeg images in an ordinary dialog using visual c++ but
i am looking for help. Many thanx

Phil

Re: Displaying Jpeg image in a dialog box

ThatsAlok12-Aug-05 0:27

ThatsAlok

12-Aug-05 0:27

jj921 wrote:
I am trying to show jpeg images in an ordinary dialog using visual c++

This link will Help :-
CEnBitmap[^]

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

cheers,
Alok Gupta
VC Forum Q&A :- I/ IV

Re: Displaying Jpeg image in a dialog box

Anonymous12-Aug-05 21:54

Re: Displaying Jpeg image in a dialog box

12-Aug-05 21:54

Sorry link not working

ThatsAlok12-Aug-05 22:08

ThatsAlok

12-Aug-05 22:08

Please Check again!

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

cheers,
Alok Gupta
VC Forum Q&A :- I/ IV

HelpNeeded

nayankumarp11-Aug-05 23:52

nayankumarp

11-Aug-05 23:52

Hi All
Can anyone plz give sample code for receiving call by using Tapi3.0 or higher.
Thanks
Nayan

WinVer

Anonymous11-Aug-05 23:48