Re: Inline assembly syntax error.. - C / C++ / MFC Discussion Boards

alternative function for MCIWndCreate API

VCProgrammer31-Oct-11 1:17

31-Oct-11 1:17

Hi all,

Is there any alternate of MCIWndCreate API.

I want to play video in my application, and for doing it i have used MCIWnd functions. But my application is crashing due to these functions.

i have written this line

<pre>
m_myPlayer = MCIWndCreate(m_WndPreview->m_hWnd,AfxGetInstanceHandle(),WS_CHILD | WS_VISIBLE |MCIWNDF_NOMENU,File_Path);</pre>

Can anybody help me in this???

Re: alternative function for MCIWndCreate API

Code-o-mat31-Oct-11 2:02

Code-o-mat

31-Oct-11 2:02

Your question is a bit vague. Are you looking for an alternate way to play AVI files? Are you looking for an alternate way to create the same MCI window? Aside of this, if it makes your application crash you are probably doing something wrong.

Anyways, to play all kinds of media, i'd try DirectShow[^] rather than MCI. I hope this can help you.

> The problem with computers is that they do what you tell them to do and not what you want them to do. <
> If it doesn't matter, it's antimatter.<

[SOLVED] Inline assembly syntax error..

CodingLover30-Oct-11 21:59

CodingLover

30-Oct-11 21:59

Hi all,

I start to do a simple application to control the P2LTCH(to blink a LED). So the toggle function as follow,

C++

void  toggleLed(unsigned char ledMask)
{
	asm
 	(
		mov dx, P2LTCH		/* Load the address of the register. */
		//in al, dx 		/* Read the contents of the register. */
		//mov ah, ledMask 	/* Move the ledMask into a register. */
		//xor al, ah 		/* Toggle the requested bits. */
		//out dx, al 		/* Write the new register contents. */
	);
}

However, it returns the following error.

C++

Error   [318] D:\Profiles\PC\WorkOnProjects\PIC\Demo\led_blink.c; 41.1 string expected
Error   [194] D:\Profiles\PC\WorkOnProjects\PIC\Demo\led_blink.c; 41.1 ")" expected
Error   [312] D:\Profiles\PC\WorkOnProjects\PIC\Demo\led_blink.c; 41.1 ";" expected

I do the coding on MPLAB IDE. Any comments really appreciate.

I appreciate your help all the time...
CodingLover Smile | :)

modified 1-Nov-11 5:54am.

Re: Inline assembly syntax error..

Malli_S30-Oct-11 22:39

Malli_S

30-Oct-11 22:39

The inline assembler block starts with "{".

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-Malli...!

Re: Inline assembly syntax error..

CodingLover30-Oct-11 23:41

CodingLover

30-Oct-11 23:41

I already tried that. But it doesn't work for me.

I appreciate your help all the time...
CodingLover Smile | :)

Re: Inline assembly syntax error..

Richard MacCutchan30-Oct-11 23:50

Richard MacCutchan

30-Oct-11 23:50

See here[^], and yes you must use curly braces around your code block.

Unrequited desire is character building. OriginalGriff
I'm sitting here giving you a standing ovation - Len Goodman

Re: Inline assembly syntax error..

CodingLover30-Oct-11 23:56

CodingLover

30-Oct-11 23:56

Thanks for the comment.

I tried a same example code segment from that page.

C++

void  toggleLed(unsigned char ledMask)
{
	__asm {
   		mov al, 2
   		mov dx, 0xD007
   		out dx, al
   	}
}

Once I compile the code it gives the following error. It wired to me from what the documentations explain (the link you gave, book I refer, etc..)

C++

Error   [192] D:\Profiles\PC\WorkOnProjects\PIC\Demo\led_blink.c; 39.1 undefined identifier "__asm"
Error   [312] D:\Profiles\PC\WorkOnProjects\PIC\Demo\led_blink.c; 39.7 ";" expected
Error   [285] D:\Profiles\PC\WorkOnProjects\PIC\Demo\led_blink.c; 44.1 no identifier in declaration
Warning [374] D:\Profiles\PC\WorkOnProjects\PIC\Demo\led_blink.c; 44.1 missing basic type; int assumed
Error   [314] D:\Profiles\OC\WorkOnProjects\PIC\Demo\led_blink.c; 44.1 ";" expected

I appreciate your help all the time...
CodingLover Smile | :)

Re: Inline assembly syntax error..

enhzflep31-Oct-11 0:51

enhzflep

31-Oct-11 0:51

I just tried a search for P2LTCH with google, finding the following block of code here.

/**********************************************************************  
 *  
 * Function:    toggleLed()  
 *  
 * Description: Toggle the state of one or both LED's.  
 *  
 * Notes:       This function is specific to Arcom's Target188EB board.  
 *  
 * Returns:     None defined.  
 *  
 **********************************************************************/   
void    
toggleLed(unsigned char ledMask)   
{   
    #define P2LTCH 0xFF5E       /* The address of the I/O register.   */   
   
    asm {   
        mov dx, P2LTCH          /* Load the address of the register.  */   
        in  al, dx              /* Read the contents of the register. */   
   
        mov ah, ledMask         /* Move the ledMask into a register.  */   
        xor al, ah              /* Toggle the requested bits.         */   
   
        out dx, al              /* Write the new register contents.   */   
    };   
   
}   /* toggleLed() */

Reading through this, I thought of your asm statement - In the code you showed using round braces, you used the asm keyword. Later you showed some code with curly braces, however I see that in the seconds code snippet you have used the __asm keyword, instead.
If you haven't already, I'd try the syntax used in the above snippet. I've a very hazy memory that somewhere I read that the __asm keyword is a MS thing. Dunno, too lazy to check. Big Grin | :-D

Though I do note that in Code::Blocks, asm gets syntax-highlighted, while __asm doesn't..

Re: Inline assembly syntax error..

CodingLover31-Oct-11 1:02

CodingLover

31-Oct-11 1:02

Actually that is the same I am referring, O'Reillys' book. But it doesn't work for me. Seems to me that my compiler is not support this.

I appreciate your help all the time...
CodingLover Smile | :)

Re: Inline assembly syntax error..

enhzflep31-Oct-11 1:18

enhzflep

31-Oct-11 1:18

Woooooah! Hold on just a minute. Did you say you're trying this code in mplab?

That code is obviously x86 inline assembly, yet I though MPLab was for embedded devices - i.e mainly PICs.

Looking at your compile log, it seems remarkably similar to the exerpt I just gotfor the HiTech C compiler, as shown below:

Executing: "C:\Program Files (x86)\HI-TECH Software\PICC\9.80\bin\picc.exe" --pass1 C:\Users\enhzflep\Documents\mplab\proj1\..\main.c -q --chip=16F84A -P --runtime=default --opt=default -D__DEBUG=1 -g --asmlist "--errformat=Error [%n] %f; %l.%c %s" "--msgformat=Advisory[%n] %s" "--warnformat=Warning [%n] %f; %l.%c %s"
Error [317] C:\Users\enhzflep\Documents\mplab\proj1\..\main.c; 5.5 "(" expected
Error [318] C:\Users\enhzflep\Documents\mplab\proj1\..\main.c; 5.5 string expected
Error [194] C:\Users\enhzflep\Documents\mplab\proj1\..\main.c; 5.5 ")" expected
Error [312] C:\Users\enhzflep\Documents\mplab\proj1\..\main.c; 5.5 ";" expected
Error [285] C:\Users\enhzflep\Documents\mplab\proj1\..\main.c; 15.1 no identifier in declaration
Warning [374] C:\Users\enhzflep\Documents\mplab\proj1\..\main.c; 15.1 missing basic type; int assumed
Error [314] C:\Users\enhzflep\Documents\mplab\proj1\..\main.c; 15.1 ";" expected

********** Build failed! **********

In that case, I think the problem is something else - i.e No, this compiler
(a) won't accept the asm keyword (but you can easily make functions in asm files then link them together into your program)

and more importantly (just now)
(b) won't build programs that you can run on your PC - I'd have expected to see the code snippet in concern built using VS or GCC.

Though, perhaps I'm just missing something?

Re: Inline assembly syntax error..

David Crow31-Oct-11 3:13

David Crow

31-Oct-11 3:13

enhzflep wrote:
I've a very hazy memory that somewhere I read that the __asm keyword is a MS thing.

This is true (about the double underscore, not your memory). Wink | ;)

"One man's wage rise is another man's price increase." - Harold Wilson

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Re: Inline assembly syntax error..

enhzflep31-Oct-11 3:19

enhzflep

31-Oct-11 3:19

Touchè!

Re: Inline assembly syntax error..

Richard MacCutchan31-Oct-11 0:54

Richard MacCutchan

31-Oct-11 0:54

I reread your original message and it seems you are using MPLAB to build this code. I suggest you check the documentation for your compiler to find out exactly why it complains about this. Are you sure this compiler supports the __asm or asm keywords? You may also be better using the MPLAB forum to get an answer to your question.

Unrequited desire is character building. OriginalGriff
I'm sitting here giving you a standing ovation - Len Goodman

Re: Inline assembly syntax error..

CodingLover31-Oct-11 1:03

CodingLover

31-Oct-11 1:03

Yeah, seems to me that the compiler I am using with the MPLAB is not supporting the syntax. I am searching on the documentation at the min.

I appreciate your help all the time...
CodingLover Smile | :)

Re: Inline assembly syntax error..

Snorri Kristjansson31-Oct-11 1:09

Snorri Kristjansson

31-Oct-11 1:09

You need to terminate the __asm block with a ';'
e.g.
__asm
{
mov eax,0
mov ebx,10
};

Also note that you MUST preserve (push/pop) any registers you use within an __asm block.
Another thing to note when using 'out' instruction - you may trigger an exception because the Windows OS allows only a few 'out' addresses accesses directly like that from user mode programs (ring 3).
If I remember correctly only tho old LPT ports are accessible.

Re: Inline assembly syntax error..

CodingLover31-Oct-11 1:12

CodingLover

31-Oct-11 1:12

I tried the same too, but no luck.

Snorri wrote:
Another thing to note when using 'out' instruction - you may trigger an exception because the Windows OS allows only a few 'out' addresses accesses directly like that from user mode programs (ring 3).

I don't have a big picture about this in my mind, since I am new to embedded systems yet. However, that information could be a value added. Thanks a lot.

I appreciate your help all the time...
CodingLover Smile | :)

Re: Inline assembly syntax error..

CodingLover31-Oct-11 23:53

CodingLover

31-Oct-11 23:53

I found the solution my self by referring the MPLAB documentation. Inline assembly need to be wrapped as follows.

C++

#asm
   // assembly code goes here
#endasm

I appreciate your help all the time...
CodingLover Smile | :)

Re: Inline assembly syntax error..

David Crow1-Nov-11 2:57

David Crow

1-Nov-11 2:57

CodingLover wrote:
...by referring the MPLAB documentation.

Keep that under your hat. Wink | ;)

How to get the current active document of MDI application?

rahul.kulshreshtha30-Oct-11 20:41

rahul.kulshreshtha

30-Oct-11 20:41

Currently I am notifying all the open documents like below.

for(POSITION pos = pDocMgr->GetFirstDocTemplatePosition();pos;)
{
   pDocTemp = pDocMgr->GetNextDocTemplate(pos);

		
   for(POSITION postemp = pDocTemp->GetFirstDocPosition();postemp;)
   {
      pDoc = (CMDITabsDemoDoc*)pDocTemp->GetNextDoc(postemp);	
      pDoc->Notify(somedata);	
   }

}

But now I only want to notify to the active document. Which function is available to get the active document?

Note : If there are 4 tabs and tab2 is open and I am having focus on some other dialog then also it should return tab2 as active tab. However if application is minimized then it should return NULL or some other indicator.

Re: How to get the current active document of MDI application?

«_Superman_»30-Oct-11 21:55

«_Superman_»

30-Oct-11 21:55

You can use CFrameWnd::GetActiveDocument.
This returns the document attached to the currently active view.

«_Superman_»
I love work. It gives me something to do between weekends.

Microsoft MVP (Visual C++)

Polymorphism in C

IIS Metadata, can't write the default pages and Mimes.

jkirkerx30-Oct-11 6:43

jkirkerx

30-Oct-11 6:43

I'm still having trouble writing a Mime list to the Metadata file for IIS on 5.5 and 6.0. My Default Documents was working, but stopped, not sure when I broke it.

I can write the Virtual Path, the asp.net Script Maps, Read write permissions.

The default Docs is the LPWSTR pszDefaultDocs[], and the Mime is pszMimes[].

If anybody with Metadata experience can just take a look at it, perhaps it just something real small I missed.

The last time I worked on it, the Mime array write said I did not submit a safe array. The metedata element type for Mimes is a string array. The element type for default docs is just a string.

//MimeMaps
	LPWSTR pszMimes[] = {
		L".application, application/x-ms-application",
		L".deploy, application/octet-stream",
		L".flv, video/x-flv",
		L".manifest, application/x-ms-manifest",
		L".msp, application/octet-stream",
		L".msu, application/octet-stream",
	};
	
    dwNumber = sizeof(pszMimes)/sizeof(LPWSTR);	
	VariantInit(&var);
	hr = ADsBuildVarArrayStr(pszMimes, dwNumber, &var);
	if (FAILED(hr)) goto CLEANUP;		
		 
	if ( SUCCEEDED (hr )) {
		hr = pADs->PutEx(ADS_PROPERTY_UPDATE, bstr_MimeMap, CComVariant(var) );
		// Fails with a invalid data error
	}
	VariantClear(&var);

	LPSAFEARRAY psaMimes;
	psaMimes = _create_W3SVC_MimeMap_Array();
	VariantInit(&var);

LPWSTR pszDefaultDocs[] = {
		L"index.aspx",
		L"Default.aspx",		
	};

	dwNumber = sizeof(pszDefaultDocs)/sizeof(LPWSTR);
	VariantInit(&var);
	hr = ADsBuildVarArrayStr(pszDefaultDocs, dwNumber, &var);
	if (SUCCEEDED(hr)) {		
		hr = pADs->PutEx(ADS_PROPERTY_UPDATE, bstr_DefaultDoc, var);
	}	
	VariantClear(&var);

Re: IIS Metadata, can't write the default pages and Mimes.

jkirkerx30-Oct-11 9:42

jkirkerx

30-Oct-11 9:42

Well I fixed the DefaultDocs, had the keyname wrong, and I reformatted the pszDefaultDocs

So thanks Fixed.

//Default Documents
	LPWSTR pszDefaultDocs[] = {
		L"index.aspx, default.aspx"
	};	
	
	dwNumber = sizeof(pszDefaultDocs)/sizeof(LPWSTR);
	VariantInit(&var);
	hr = ADsBuildVarArrayStr(pszDefaultDocs, dwNumber, &var);
	if (SUCCEEDED(hr)) {		
		hr = pADs->PutEx(ADS_PROPERTY_UPDATE, bstr_DefaultDoc, var);
	}	
	VariantClear(&var);

I'm almost there, how to add to safe array

jkirkerx31-Oct-11 13:18

jkirkerx

31-Oct-11 13:18

Well after a day and a half, I can get the pointer, pull the values from the key if there is a key, I can create a new key, and populate the data,
but I can't figure out how to put my data in the safe array.

the PutEx will write the safe array, I just need to get data in it.

My Data
L".application, application/x-ms-application",
L".deploy, application/octet-stream",
L".flv, video/x-flv",
L".manifest, application/x-ms-manifest",
L".msp, application/octet-stream",
L".msu, application/octet-stream",

// Create an array to hold the new values
	VariantArray va(cVariants + 1);
		
	SAFEARRAYBOUND saBound = {cVariants, 0};
	SafeArray sa(VT_VARIANT, 1, &saBound);

	VARIANT varArray;
	VariantInit(&varArray);

	V_VT(&varArray) = (VT_VARIANT | VT_ARRAY);
	V_ARRAY(&varArray) = sa.psa;

	for (i = 0; i < cVariants; ++i) {
		hr = SafeArrayPutElement(sa.psa, &i, &va.pa[i]);
		RETURN_ON_FAILURE(hr);
	}		
	
	// Write back to the pointer
	hr = pApp->PutEx(ADS_PROPERTY_UPDATE, bstr_MimeMap, varArray);
	// Commit the Write to the Metabase
	hr = pADs->SetInfo();

Build problems

columbos1492730-Oct-11 1:24

columbos14927

30-Oct-11 1:24

Hello,
Im using Win7 64 bit,visual studio 2008.

When i build my application i chosse the Win32 option at the top of the vs2008 menu and i compile the project and what i get is:
I can run the application from the vs2008 environment but at the build directory i dont get the exe file.

But when i try to build under x64 option the buld procces doesnt work.

Any body knows what is the problem?

Thanks.

Re: Build problems

Richard MacCutchan30-Oct-11 2:51

Richard MacCutchan

30-Oct-11 2:51

columbos14927 wrote:
I can run the application from the vs2008 environment but at the build directory i dont get the exe file.

You cannot run the application in the build environment unless the exe file exists. Take another look in your directory tree.

columbos14927 wrote:
But when i try to build under x64 option the buld procces doesnt work.

We need more details to be able to offer a suggestion.

Unrequited desire is character building. OriginalGriff
I'm sitting here giving you a standing ovation - Len Goodman

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