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Altera_Forum's avatar
Altera_Forum
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12 years ago

Multicycle custom instruction repeated calls, hangs, signals

Hello, I have some problems with a multicycle custom instruction. I'm using a Terasic DE1 board with Quartus II 13.01 64 bit on Ubuntu 12.04. I've started with the NIOS II system for "count...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
12 years ago

For what it's worth, after you stop using 'U' as dsl described, your custom instruction VHDL that you pasted is fine.

Whatever hang you're seeing is not caused by the VHDL you pasted, and it is something else.

If you're not able to figure it out, my suggestion would be to post a .zip of a simplified project (NIOS+Onchip SRAM+your custom instruction) that others can compile and run.