# Simple step by step NiosII implementation

**URL:** <https://forums.freertos.org/t/simple-step-by-step-niosii-implementation/6772>\
**Category:** Kernel\
**Created:** [September 13, 2017, 9:44am UTC](https://forums.freertos.org/t/simple-step-by-step-niosii-implementation/6772 "2017-09-13T09:44:59Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![system](https://d2v6vdsk2p900z.cloudfront.net/original/1X/7fc8fdb729c645aab5b20282bbe34e57cb407be6.jpeg) [@system](https://forums.freertos.org/u/system)\
**Post date:** [September 13, 2017, 9:44am UTC](https://forums.freertos.org/t/simple-step-by-step-niosii-implementation/6772/1 "2017-09-13T09:44:59Z")

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**[callika](https://sourceforge.net/u/callika/)** wrote on [Wednesday, September 13, 2017](https://sourceforge.net/p/freertos/discussion/382005/thread/b4b91ff7/#472f):

Hello. Can anyone show me simple and WORKING step by step implementation guide FreeRTOS for NiosII 13.1+ ?  
P.S. Can FreeRTOS correctly working with VIC?

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**Author:** ![rtel](https://d3iykfbgfh8zhg.cloudfront.net/user_avatar/forums.freertos.org/rtel/32/31_2.png) [@rtel](https://forums.freertos.org/u/rtel)\
**Post date:** [September 13, 2017, 2:11pm UTC](https://forums.freertos.org/t/simple-step-by-step-niosii-implementation/6772/2 "2017-09-13T14:11:56Z")

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**[rtel](https://sourceforge.net/u/rtel/)** wrote on [Wednesday, September 13, 2017](https://sourceforge.net/p/freertos/discussion/382005/thread/b4b91ff7/#472f/52b1):

I doubt it. Perhaps you could describe what you have done to try and  
get this running and what issues you came up against.

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<div class="post-metadata">

**Author:** ![system](https://d2v6vdsk2p900z.cloudfront.net/original/1X/7fc8fdb729c645aab5b20282bbe34e57cb407be6.jpeg) [@system](https://forums.freertos.org/u/system)\
**Post date:** [September 19, 2017, 11:01am UTC](https://forums.freertos.org/t/simple-step-by-step-niosii-implementation/6772/3 "2017-09-19T11:01:19Z")

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**[callika](https://sourceforge.net/u/callika/)** wrote on [Tuesday, September 19, 2017](https://sourceforge.net/p/freertos/discussion/382005/thread/b4b91ff7/#284a):

I successefully runed freeRTOS using IIC.  
But when I added VIC in my Qsys, I got the following errors

```auto
"undefined reference to `alt_irq_handler'	port_asm.S"
"undefined reference to `alt_irq'	port.c"
"undefined reference to `alt_irq_disable'	port.c"
"undefined reference to `alt_irq_enable'	port.c"

```

I found out that these functions are related to IIC. What can I do about it?

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<div class="post-metadata">

**Author:** ![rtel](https://d3iykfbgfh8zhg.cloudfront.net/user_avatar/forums.freertos.org/rtel/32/31_2.png) [@rtel](https://forums.freertos.org/u/rtel)\
**Post date:** [September 19, 2017, 1:25pm UTC](https://forums.freertos.org/t/simple-step-by-step-niosii-implementation/6772/4 "2017-09-19T13:25:55Z")

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**[rtel](https://sourceforge.net/u/rtel/)** wrote on [Tuesday, September 19, 2017](https://sourceforge.net/p/freertos/discussion/382005/thread/b4b91ff7/#284a/e5c7):

Perhaps the names of these functions have changed since the port was  
created. Can you refer to the documentation or any examples that came  
with the compiler/tools to see if that is the case.