VPBE SDRAM address register

HI,

When you say "setting te background" works, what do you mean?

When you set the VIDWIN0 size to smaller value (i.e., to D1), are you able to see that the rest of the screen is set to the color that you intended? You can set bkgd color in MODE register.

Try play with the XL, YL, XP, and YP bit fields, and see whether this corrupted screen can be moved and size-adjusted.

Hi Paul,

you understood my encoded information ... shifting the video window to the right makes the background color (in my case blue) visible.

What do you think about the SDRAM address register?

Sebastian

let me look into this. I think your register setup is correct, and I will verify it locally.

Are you able to play with XL, YL, XP, and YP so that you corrupted video appears in the center of the screen w/ blue borders on all 4 sides (background)?

BTW. Are you using CCS or Linux? It will be much easier to debug if this is in CCS.

Hi Paul,

thank you for your attention.

Yes I am able to resize the video window to show four blue borders. But there is something weired going on.

RESX = 1280, XP = 100, XL = 1280 - 200

RESY = 720, YP = 100, YL = 720 - 200

The borders with a width of 100 pixel each do not appear on the right side. The monitor has a resolution of 1280x1024, but the signal is 1280x720. Thus the image should be stretched vertically. But on the image the left border seems to be stretched - horizontally stretched.

To center the video window, I have to reset the window-y-size

YL = 1280 - 840 = 440

Now the picture is centered. The color pattern has changed.

From your question about my development environment, I can derive that you are interested in my register settings. The register read out with the help of my Linux kernel module is:

Register offset VPBE.OSD 0x01c71c00
 0x000 : 0x000000cc 0x00000001 0x00000000 0x00000000
 0x010 : 0x00000000 0x00000000 0x00001050 0x00000050
 0x020 : 0x00000000 0x00000000 0x0000002d 0x0000e100
 0x030 : 0x00000000 0x00000000 0x00000000 0x00000000
 0x040 : 0x00000050 0x00000018 0x00000064 0x00000064
 0x050 : 0x000001b8 0x00000208 0x00000000 0x00000000
 0x060 : 0x00000500 0x000002d0 0x00000000 0x00000000
 0x070 : 0x00000000 0x00000000 0x00000000 0x00000000
 0x080 : 0x00000000 0x00000000 0x00000000 0x00000000
 0x090 : 0x00000000 0x00000000 0x00000000 0x00000000
 0x0a0 : 0x00000000 0x00000000 0x00000000 0x00000000
 0x0b0 : 0x00000000 0x00000000 0x00000000 0x00000000
 0x0c0 : 0x00000000 0x00000000 0x00000000 0x00000000
 0x0d0 : 0x00000000 0x00000000 0x00000000 0x00000000
 0x0e0 : 0x00000000 0x00000000 0x00000000 0x00000000
 0x0f0 : 0x00000000 0x00000000 0x00000000 0x00000000

Register Offset VPBE.VENC 0x01c71e00
 0x000 : 0x00002011 0x00002000 0x00000000 0x00000003
 0x010 : 0x00000028 0x00000004 0x00000603 0x000000a0
 0x020 : 0x00000500 0x000002eb 0x00000018 0x000002d0
 0x030 : 0x00000000 0x00000000 0x00000000 0x00000500
 0x040 : 0x0000ff00 0x00000000 0x00000000 0x00000001
 0x050 : 0x00000000 0x00000000 0x00000000 0x00000000
 0x060 : 0x00000000 0x00000800 0x00000001 0x00000000
 0x070 : 0x00000000 0x00000000 0x00000000 0x00000000
 0x080 : 0x00000000 0x00000000 0x00000000 0x00000000
 0x090 : 0x00000000 0x00000000 0x00000000 0x00000000
 0x0a0 : 0x00000000 0x00000000 0x00000000 0x00000000
 0x0b0 : 0x00000000 0x00000000 0x00000000 0x0000000a
 0x0c0 : 0x00000000 0x00007000 0x00000000 0x0000017a
 0x0d0 : 0x00000000 0x00000000 0x00000000 0x00000000
 0x0e0 : 0x00000100 0x00000000 0x00000000 0x00000000
 0x0f0 : 0x00000000 0x00000000 0x00000000 0x00000000
 0x100 : 0x00000400 0x0000057c 0x00000159 0x000002cb
 0x110 : 0x000006ee 0x00000400 0x0000057c 0x00000159
 0x120 : 0x000002cb 0x000006ee 0x00000000 0x00000001
 0x130 : 0x00000002 0x00000000 0x00000000 0x00000000
 0x140 : 0x00000111 0x00000000 0x00000000 0x00000000
 0x150 : 0x00000000 0x00000000 0x00000000 0x00000000
 0x160 : 0x00000000 0x00000000 0x00000000 0x00000000
 0x170 : 0x0000d642 0x00000000 0x00000000 0x00000000

Is this information helpful for you?

Regards

Sebastian

Sebastian,

HSPLS, VSPLS, HINT, HVALID, HSTART, VINT, VVALID, VSTART, HSDLY, VSDLY can be modified to change the display as well (the thing you noticed above is related to these setup). There is not really a fixed formular for this, you might have to try it out until you see a timing that you desire.

Are you able try your experiment in CCS? It might save your sometime debugging

It appears that you've enabled OSD, could you please disable and try VIDWIN0 only?

What I will suggest is you check the value of VIDWINADH, VIDWIN0ADL and VIDWIN0OFST, make sure you are indeed pointing to the buffer you setup. Also, please make sure your input data format matches.

Paul,

I understand that there is no definite definition for the timing register and its no problem for me to make a try and error method.

Where did you see an enabled OSD? You where right, I wrote some register on the false address. I checked my register address header and found some wrong addresses coming from my old dm355 system.

The monitor now shows the content of the frame buffer.

Now I can continue with the VPFE.

Thank you for your help.

Sebastian

Hi,

I am having difficulty in actually getting my picture to display and seeing as you got this running I would like to ask a couple of questions.

What was wrong with the address that you specified as the buffer address? Did you simply point oto the wrong address?

I can adjust the window 0 to the size I want to, but my image is not displayed in the window. It is simply some default green screen. Did you load your bitmap "as is" into DDR2 RAM at the VIDWIN0ADR? Or did you do some kind of conversion first?

The address I load into is 0x80200000.

Any advice would be appreciated?

Thanks,

Herman van Wyk