Alright, here's the beef. I'm basically writing a program for a PIC18 microcontroller. There's just one problem, my main asm file, it compiles C into assembly and then turns it into bytecode, is too big to be loaded into memory. So I'm getting compiler errors telling me the section is too long. It's not a very high end microcontroller, but I'm still pretty surprised I hit its limit so fast.

My program has a copious amount of char arrays, size 17. I did some removal of the parts of the program concerning the char arrays. I then declared them before the main method. It didn't compile. When I removed them, it compiled.

I was thinking of splitting up some of the methods into another file. How do I do that ? How do I access said external methods from the class file containing the main method.

Alternatively, a simple way to fix this would be to tell me a way to store some char arrays in another file. I would also need to know how to access them using the main method file.

I was schooled in Java, so I'm not sure how to go about doing this in C. Normally I would make a constructor for an object in that external file. Make that keep all the arrays. Then use dot operators to access the variables I want from the new object.

I'm quite sure I surpassed the maximum size for one such C file. The microcontroller will definitely accept more C files, it has 2 MBs of program space.

According to this, there is a big difference between the amount of code space and the amount of data space.

Posting more specific details, like actual links to the devices you're using, and actual error messages (you don't say for example whether it was the code or data which overflowed) would be useful.

This article has been dead for over six months. Start a new discussion instead.