Article ID: 000077321 Content Type: Troubleshooting Last Reviewed: 09/01/2018

Why I am not able to build the CRC Nios II custom instruction example?

Environment

    Intel® Quartus® Prime Pro Edition
    Nios® II Embedded Design Suite (EDS)
    Nios® II Processor
BUILT IN - ARTICLE INTRO SECOND COMPONENT
Description

When using the CRC Nios® II custom instruction example in https://www.altera.com/support/support-resources/design-examples/intellectual-property/embedded/nios-ii/exm-custom-instruction.html in 17.1

there is a compiler error of undefined reference to ALT_CI_CRC_0_N.

 

Resolution

To fix this issue, the ALT_CI_CRC_0_N variable name in ci_crc.c need to be changed to ALT_CI_CRC_CUSTOM_INSTRUCTION_0_N.

This is due to the earlier name set for the Nios® II custom instruction component, as stated in Step 2. page 30 from this document;

https://www.altera.com/en_US/pdfs/literature/ug/ug_nios2_custom_instruction.pdf

 

A future fix will be applied on the software code files in coming 18.1

 

Related Products

This article applies to 1 products

Intel® Programmable Devices

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