GTS Encoder Compilation Error

Technical Programming
1
  1. We take Kevin’s encoder project from his website.
  2. We remove the phase B logic.
  3. We try to compile.
  4. We get an error saying:

\frc_encoder\frc_encoder\encoder.c:130:Error [1205] unknown member 'INT3IP' in '__tag_223'
\frc_encoder\frc_encoder\encoder.c:130:Error [1131] type mismatch in assignment
  1. We find the error is occurring here:

// interrupt 2 is low priority
INTCON2bits.INT3IP = 0;

If we remove the segment of code, the interrupt is always on high priority and messes other things up. We’d be very gracious for any solutions.

2

Seen it before. There’s what appears to be a typo in one of the system’s .h files, p18f8722.h. It may be in others as well, but I assume it’s this one you’re using. Just do a text search for INT3P and change it to INT3IP.

3

Don’t forget to read the documentation, specifically step 9 of encoder_readme.txt.

4

Thank you very much, we did follow the readme, but we must have missed that. Our program now compiles without error. Thanks again.

5

Hey folks, looking for some help with a problem that has been posted about a few times already. It involves the typo in the p18f8722.h file.

I’ve gone in an edited the typo from INT3P to INT3IP in that .h file and I still receive this error:

Executing: "C:\mcc18\bin\mcc18.exe" -p=18F8722 "gear_tooth.c" -fo="gear_tooth.o" /i"C:\mcc18\h" -D_FRC_BOARD -D_LARGE_CODE -D_DONT_USE_TMR0 -mL -Ou- -Ot- -Ob- -Op- -Or- -Od- -Opa-

\FrcCode_2007_8722\gear_tooth.c:71:Error [1205] unknown member 'INT3IP' in '__tag_248'
\FrcCode_2007_8722\gear_tooth.c:71:Error [1131] type mismatch in assignment

Another mentor sent me his .h file and I over-wrote mine and it still didn’t compile. I have some knowledge of programming, but details like this elude me. Thanks for any help you can offer.

6

Did you drop the new 18f8722.h file into the compiler’s “h” directory (i.e., c:\mcc18\h)? If not, the compiler won’t find it and you’ll continue to receive this error.

-Kevin

7

Yes. And then I edited the .h file and saw that it still had INT3P instead of INT3IP and I changed it manually and saved the file. I restarted MPLAB and recompiled and get that error every time.

8

You should not have needed to edit the file, you probably recreated the problem when you edited it.

9

I only edited it after testing it untouched and having it fail. Then I read the 5 or 6 posts about the issue and they all pointed to a very specific typo and to the best of my ability I found the problem and changed INT3P to INT3IP.

10

Yes, this is a known bug in the provided mcc .h file.

I went through the same exercise and by changing the INT3P to INT3IP in mcc18/h/p18f8722.h it fixed the problem for me.

Is there a local copy of the the include file in your project directory? Try renaming the mcc18/h/p18f8722.h file to h_ and try recompiling. If it doesn’t complain about not being able to find the file, then it is using a copy from somewhere else. Also, make sure the error is the same. I had some code that referenced the field as INT3P and fixing the include file kick the error of not being able to find INT3P – a quick look might mistake this for INT3IP.

11

Good suggestion for the file rename. I did that, and the compiler couldn’t find the file anymore. Changed it back and get the same compiler error.

Not sure what you mean in your second point. I opend the 8722.h file and searched for all INT3P and changed it to INT3IP but the error persists.