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Altera_Forum's avatar
Altera_Forum
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17 years ago

NIOS Custom instruction compilation problem

Hi everybody, I'm trying to add a custom instruction to a NIOS processor, through the SOPC Builder tool, with tools version 8.1. When I try to generate the system (button "generate" in SOP...
Altera_Forum's avatar
Altera_Forum
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17 years ago

Answering to myself; this might help someone ...

I took the description files of my custom instructions as generated by the 6.0 version of SOPC Builder.

They consist in folders named user_logic_xxxxx containing a class.ptf file describing the instruction module.

In newer versions of SOPC (like 8.1), custom instruction modules are described by .tcl files.

Importing the old-fashioned description files in a 8.1 Quartus project worked fine and the project compiled. Instead of converting ptf files to tcl files as I would expect, SOPC Builder kept the ptf files and named my instructions "cpu_user_logic_xxxxxx_classic".

No problem occured about the vhdl functions which were the issue with .tcl files. So I guess I'll stick with the "classic" version of importing user modules :-)