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Altera_Forum's avatar
Altera_Forum
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15 years ago

NIOS II Custom Instruction CRC

Hello, My lab partner and I are trying to get the custom instruction set to compile, but we run into two issues. 1. We try to create the CRC components, but get duplicate signal type error...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

What is the error message you are seeing? If the custom instruction isn't being correctly connected to the CPU then ALT_CI_CRC_N will not be defined in system.h

I just looked at the document, I recommend creating the custom instruction using the component editor directly instead of attempting to open it from with the Nios II wizard. Just create a custom instruction slave interface and assign all the signals in the file "CRC_component.v" to the custom instruction slave. The file CRC_component is the top level file.