Forum Discussion

Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
14 years ago

Arrays-VHDL

1.In arrays(of real type ) how are we supposed to find the maximum value index in the array?I think A'HIGH is something different which gives the highest subscript of the array.What's the difference ...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
14 years ago

Maybe you wan't to do the transition from real to fixed point in matlab.

There should be something (in the fixed point toolbox) named "fixed point objects"

Doing that you'll can do the validation of certain fixed point resolutions in matlab.

After you've implemented the above in HDL an ecquivalency check against your matlab

results is sufficient for verification, which is a huge advantage, because you can have

your computer do it for you.

Since VHDL2008 there should be fixed point and floating point type packages.

The libraries are free for download (google should do the trick).

I've no experience with that libraries except that I've successfully compiled an example

with QII a long time ago.