Frequency dependent SOPC builder components
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Frequency dependent SOPC builder components

 
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avishay
Guest
Posted: Wed Dec 14, 2005 1:15 am    Post subject: Frequency dependent SOPC builder components Reply with quote
Hello all,
I'm designing a component for integration in Altera's SOPC builder, for
which I have to set some frequency dependent constants (for timing
generation). How can I pass the component's assigned frequency from the
SOPC builder to the VHDL? I can do either with VHDL generic or some
kind of dynamic source code modification using the build script.

Thanks,
Avishay
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Mark McDougall
Guest
Posted: Wed Dec 14, 2005 1:15 am    Post subject: Re: Frequency dependent SOPC builder components Reply with quote
avishay wrote:

Quote:
I'm designing a component for integration in Altera's SOPC builder, for
which I have to set some frequency dependent constants (for timing
generation). How can I pass the component's assigned frequency from the
SOPC builder to the VHDL? I can do either with VHDL generic or some
kind of dynamic source code modification using the build script.

If you define a generic in the top level of your component, SOPC should
allow the user to edit the value when they create an instance of the
component.

Regards,
Mark
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avishay
Guest
Posted: Wed Dec 14, 2005 9:15 am    Post subject: Re: Frequency dependent SOPC builder components Reply with quote
This wasn't my meaning. In the main SOPC builder screen, a clock is
assigned to each component, and the frequency of each clock is entered
at a separate table. I need access to this information.

Thanks,
Avishay
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Mark McDougall
Guest
Posted: Thu Dec 15, 2005 1:15 am    Post subject: Re: Frequency dependent SOPC builder components Reply with quote
avishay wrote:

Quote:
This wasn't my meaning. In the main SOPC builder screen, a clock is
assigned to each component, and the frequency of each clock is entered
at a separate table. I need access to this information.

A quick look in <C:\altera\kits\nios2_51\bin\gtf> shows a file called
MODULE_FREQ.gtf which apparently 'returns the frequency of the indicated
PTF module'. My guess is you need to somehow call this in a customised
build script, and quite possibly generate a VHDL source file from this
information?!?

Regards,
Mark
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