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Altera_Forum
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20 years ago

Problem interfacing to external logic

Hi, I need to include some external peripherals in a custom design, one of them is implemented using a MAX-II device, others are commercial chips, they all require several address and control l...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
20 years ago

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The first thing I found strange was that an extra data bus appeared after generating the nios with the SOPCBuilder, this one related to the user logic I inserted. Is this normal? What is this for?[/b]

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So you saw two data buses pop up? I would look in the component to make sure you don&#39;t have two signals defined as data.

Also what version of Quartus and Nios are you using? (The fact that you said interface to user logic seems to suggest you are using old tools since Quartus II 4.2 and above have "Component Editor" which is a more flexible component than interface to user logic)