Xilinx System Generator Blocks

[chinsin83]

2d fir mdl xilinx

is there a way for the blocks to determine the output block parameters?

for example: there is a demo of a 2d-fir filter for an image. i looked undermask to see how they do it. they convert the image to a serial stream, filter, then recreate the image.

when they recreate the image, they used a buffer. they did not specify the size of the output buffer, but used variables R*C in the output buffer size parameter. its the same for the block for converting 1-d to 2-d.

is R and C common variable? or do i have to initialize it first? that is R represent the rows of input and C represent the columns of input.

 

[echo47]

They are probably initialized in an "m" file somewhere.
Which demo are you looking at? I opened "2-D Image Filtering using a 5x5 Operator", but I don't see R or C anywhere.

 

[chinsin83]

**broken link removed**

this is the filename edge_detection_fixed_elaborate.mdl

i've got another question.

xilinx have a 5x5 filter which have 9 2-d filter coefficients. The help file states "You can substitute your own coefficients and scale factor by modifying the mask of the 5x5 filter block, under the Initialization tab."

How do i call out the initialization tab?

 

[echo47]

I'm getting tons of warnings about missing files in that edge detection project.

The R and C values are initialized in the model initialization function. Right-click the empty white background -> Model Properties -> Callbacks tab.

I can't find that 5x5 filter initialization tab either.

 

[chinsin83]

hahaha .. i juz found it out by clicking the wrong link .. lol ... right click the block .. its under "edit mask" .. i wanted to click "look under mask" .. and found it .. lol ..

 

[echo47]

What did you right-click? When I right-click the 5x5filter block, I see "Look Under Mask", but not "Edit Mask". It's not in the drop-down Edit menu either. I'm using Simulink 6.1 (R14SP1).

 

[chinsin83]

oh .. you have to disable the link to the library first .. then you can edit it .. im using the same version as u

Added after 3 minutes:

echo, do you know about the virtex/virtex2 line buffer block? how does it different from the delay?