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Microcontroller Programming » Anybody Using NetBeans IDE for NerdKits Code?

December 11, 2011
by crizzo99
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Hi, I am using Netbeans for my IDE instead of PN. Everything works great except I get some nit problems with the code assistance. The problem is the assistance is flagging as an error these lines in the initialload.c program:

DDRC |= (1<<PC4); PORTC |= (1<<PC4); PORTC &= ~(1<<PC4);

It is saying that it is "Unable to resolve DDRC, PC4, PORTC variables"

What's funny is that it doesn't stop me from building the project/code and runs the existing Makefile compiling, linking and loading the uC just fine.

I am using the downloaded source code for this so the includes are the same in the following order:

include <stdio.h>

include <avr/io.h>

include <avr/interrupt.h>

include <avr/pgmspace.h>

include <inttypes.h>

include "../libnerdkits/delay.h"

include "../libnerdkits/lcd.h"

I've made sure the the winAVR include paths are a part of the project and should be searched which is why I think everything is still working properly. I'm no C expert and I assume everybody is using PN but I thought I would ask here anyway. Anybody have any thoughts on why this may be happening. I've been using NetBeans for quite some time so I am not rushing to quickly to judge that the problem is in their system.


December 13, 2011
by huzbum
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I've recently started using netbeans too. It flags errors for me whenever I access the registers. I think it's because they are MCU specific and not declared anywhere (as far as it knows). I'm not sure how to fix it, but I would be interested to know if you figure it out.

December 14, 2011
by hevans
(NerdKits Staff)

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Hi crizzo99 and huzbum,

This is just a guess, because I have never used NetBeans, but I think the avr-libc documentation for io.h offers some insight as to this problem. In addition to defining some other things io.h also looks at the -mmcu switch given to avr-gcc to load the appropriate avr/ioXXXX.h header. The switch is defined in the Makefile, which explains why it works when you compile, but doesn't work for NetBeans stand alone compiler.

I think if you explicitly add <avr/iom168.h> to your includes this issue might go away.


December 19, 2011
by Striker
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You can actually turn these errors off specifically if they are bothering you that much.

Open the options menu and along the top you will see a big "C/C++" icon (assuming you have the C/C++ plugin installed). Click this and go to the highlighting tab and un-check "Highlight Unresolved Include Files" and "Highlight Unresolved Identifiers"

December 21, 2011
by crizzo99
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Humberto and Others,

Thank you all very much for your assistance. Humberto's suggestion works perfectly. This definitely appears to be a problem in the Netbeans code assistance software and/or the AVR include files (or both) that one or the other doesn't like. When researching this I did notice the linkage between io.h and all the specific uC include files but I noticed they stated very clearly not to include them directly so I didn't, thinking the problem might be elsewhere. Stupid me, not that my computer would blow up or something if I actually stuck it in there and ran a test. Oh well, live and learn.

Like I stated before I am not a very proficient C/C++ or uC programmer (yet). That's why I am starting with the NerdKit... Anyway, I depend a lot on the Netbeans IDE to allow me to view the prototypes, declarations, definitions, defines, etc. to increase my understanding of where these are identified. They (Netbeans) have a nice interface to do this and I rely on it a lot. I am happy Humberto's suggestion solves the issue and now I can get back to the important stuff...learning!

Thanks again, Chris

December 21, 2011
by hevans
(NerdKits Staff)

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Hi crizzo99,

Glad you have it working. The reason the documentation suggests you not include these files directly is for portability. By including a header file meant for a specific chip you are making your code work only with that chip type. It is generally recommended from a design stand point to try and keep the specific hardware abstracted away from the code, but to make something work with and IDE temporarily, its not going to hurt.


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