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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
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12 years ago

I'm pretty sure "DONE" needs to be asserted for a single clock only.

The NIOS is probably hanging prior to issuing the next instruction because it's waiting for "DONE" to be de-asserted?

I don't think you have to do anything special with "RESULT" when you clear the "DONE" bit (it can keep it's old contents).