Register file map

[ysaacb]

Hi everybody

I worked with another C compiler an now I am trying with CCS

Why the register file map is not defined in the device header, I understand that in CCS C is necessary to use #BYTE or #BIT directive to access directly to one of the register.

Considering that in a project can occur to change the device, the code has to be revised an adapt to the new file addresses. And there is the need to find in the data sheets the corresponding address.

In other compilers the table is already defined for each device.

Ysaac

[treitmey]

I don't know whats going on in CCS's head.
And correct me if I am wrong...

But I think the therory is that most people don't change chips very often.
((I use only 3 16F877A,18F452,18F4525))
and the 4525 is the replacement for the 452

Since you don't change often.. this remaping is just part of the move.
just like you will have to review the spec for other changes, and the errata,
and timming, and the ports....

[Ttelmah]

The point is that CCS, do not expect you to manually access anything. In general, 99% of code, should not need to touch the registers directly at all. The compiler already has the setups for all the peripherals, and IO functions for them all as well. The only times when register accesses are needed, are where:
1) There is a fault with the inbuilt functions.
or
2) You want to use a peripheral in a manner that the standard code does not support.
Most other compilers have signifcantly fewer 'prebuilt' functons, so instead provide the map for you to write your own.

Best Wishes