Stack size for 18F2620

[Joe Rocci]

Anyone know what the size of the subroutine stack is for the 18F2620?

Joe

[Bruce]

31 for the 18F series.

[Joe Rocci]

Thanks Bruce! How about the 16F687, which I'm trying to make interchangeable PBP code for?

[Bruce]

Hi Joe,

The return stack for 14-bit core is 8 levels deep.

In the data sheet look in the Program Memory Organization section for stack
size information.

[Joe Rocci]

Yes, I saw that the PIC stack is 8 levels deep, but what is the PBP subroutine maximum stack depth (nesting)?

[Bruce]

Hi Joe,

Subroutine nesting is normally restricted to 4 levels deep on 14-bit core, and
27 levels deep for 18Xxxx parts.

Look in the manual under GOSUB.

[mister_e]

But if you want more... Darrel did something interesting awhile back
http://www.pbpgroup.com/modules/wfsection/article.php?articleid=14

Didn't use it as now but i'm sure it works :)

[Joe Rocci]

mister e,

Thanks for the lead! This looks like a good solution for what I need. I'll take a closer look when I get back in the office Monday.

Thanks Again!

Joe

[Darrel Taylor]

It works!

In fact, it was the basis for the RTOS that ended up on the Proton forum. :)
<br>

[mister_e]

Why i'm not surprise at all :)