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Altera_Forum's avatar
Altera_Forum
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15 years ago

VIP lcd demo

Hello there!

I am trying to run the demonstration I downloaded from there:

http://www.nioswiki.com/Nios2EmbeddedEvaluationKit/Altera's_Video_and_Image_Processing_Suite_Demo_on_the_NEEK

I cannot say it does not work, actually it does something. However, there is absolutely

no interactivity with the source code provided.

In the main.c, there is a loop which (I suppose) should provide some interactivity.

But this loop is never reached.

When I set breakpoints, I can go step by step until Mixer_init();

This starts the video display, but that's the last function I can step over.

If I try to step into one of the functions after this line, the debugger seems to be

lost.

Basically what I would like to do first is:

- Have some interactivity (draw menus, etc), and have actions caused by these menus;

- Grab a frame's data buffer;

- Do some processing on it.

Some questions:

- What is the minimal configuration? If I comment out the lines Clipper_init() or

Scaler_init() that are before Mixer_init(), then the image does not show. But I don't need

a scaler and a clipper.

- Is there some free IP with full source code around? For instance showing hot to

get an interrupt, read a frame from some memory buffer, return a pointer to it, etc,

working on NIOS? The problem with the prebuilt elements is that there is no access

to the source code. I would be happy to know for instance, what is in Mixer_init().

Well, I know that it's a wrapper function managing an object, but I would like to know

what exactly happens in the object itself.

Thanks.

By the way, could somebody at Altera filter the irrelevant comments at this link:

http://www.nioswiki.com/Nios2EmbeddedEvaluationKit/Altera's_Video_and_Image_Processing_Suite_Demo_on_the_NEEK

Pascal

2 Replies

  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    15 years ago

    Hello!

    Thanks for your reply!

    I downloaded the same one. Actually it was the program I was already using.

    It compiles out of the box in my case, but the image is swept by an horizontal

    line a few times, then the top blue band is replaced by a white band, then after

    a while the image disappears completely and is replaced by a color pattern (the

    image is split horizontally, the top half is a gradient from blue to lime green,

    and the bottom part is a gradation from red to yellow).

    Now I'm not sure how to set the option -O0. I right-clicked the project, went

    to properties -> C/C++ build and added -O0 (minus capital-O zero) in the

    field "compiler invocation command". Is this right?

    Anyway it does not change anything, I still cannot enter the functions I want to

    jump into (at least after the mixer is started).

    By the way, I am using quartus 9.1 sp2 and NIOS 9.1 IDE. Both were downloaded

    at the same time, so I guess they fit.

    Now I have rebuilt the same program from scratch (as you tell me it works fine),

    but I get the same result as before: no interactivity at all.

    Could you describe how your program works?

    As for mine, the image (roughly 640 x 480) is centered and it displays live video.

    The top margin (from the top of the screen to the top of the picture) has been replaced

    by a blue rectangle. That's it. No interaction although the touch panel is enabled.

    It never enters the while loop. As there are issues with the debugger, I print a marker

    everytime the loop is entered, but nothing is printed on the console, so the loop is not

    reached. Any idea?

    Thanks,

    Pascal