migrating from 16f877

[pmuldoon]

I've reached the limit of progam memory in a couple of 16F877 projects.
The code is all written in C using the CCS compiler.
I'm considering using the 18F252 as a drop-in replacement and buying the PCH compiler to recompile the C code.

Is this chip a good choice for the migration?

Where can I find info re: tricks & traps to look out for when migrating from 16F to 18F chips and PCM to PCH.

Am I just being too paranoid and probably won't encounter any major headaches?

Thanks,

Patrick

[Chas]

I just did the same thing on a recent project and had the same paranoia that you do. I was completely wrong. The transistion was fairly straight forward. The changes that I needed to be aware of follow:

LVP pin is changed to RB5 on the 18F parts.
Change any direct register address assignments.
Change any direct pin assignments
Change #fuse parameters
Be aware that memory addressing is in 8 bit bytes with instructions on the even word boundaries

Beyond the above I had fairly smooth sailing.

Let us know how it works out.

[Ttelmah]

[Rene]

I did a migration from 16f877 to 18f452.

Never had a moment of regret about it.

[pmuldoon]

I was hoping you'd say that!

Thanks for the comments, guys.