Avalon Interface data bits per symbol as component parameter

Question

A Qsys component I created uses an Avalon-ST interface. I'm trying to set the data bits per symbol property of the streaming source as a parameter of my component so that it can be set from an Instance Parameter from my top-level Qsys system.

I need this because this component is connected to an IP Core (NCO) that changes its data bits per symbol when you change its resolution parameters. So of course, I need the source and the sink data bits per symbol to match.

If the above isn't possible, are there any other workarounds?

Thanks.

altera_forum · Answer

do you need that at runtime or at compiletime?

altera_forum · Answer

Compiletime. I'm able to set the Avalon signal widths through parameters, but I don't know how to achieve this with bits per symbol.

altera_forum · Answer

you want to write some tcl code and give the value of some variable to the parameter. You also may want to read [1] and [2] for that purpose.

[1] https://www.altera.com.cn/zh_cn/pdfs/literature/hb/qts/qsys_tcl.pdf

[2] https://www.altera.com.cn/zh_cn/pdfs/literature/hb/qts/qsys_intro.pdf

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Avalon Interface data bits per symbol as component parameter

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