On Fri, Jun 08, 2001 at 11:57:56AM -0700, Kashif Ali wrote:
> Hi all,
>
> I need more then 100 reg but 16f874 has only 96 reg in its first bank and I
> don't know how to utilize next bank reg.
>
> Please give an example of utilizing both bank 0 & 1 in one routine.
>
> Kashif ali

Kashif,

You need a copy of the datasheet. It describes exactly how to change banks.
It's section 2.2 of the 16F87X datasheet. Page 12. More detail can be found
in the 16F family midrange manual in section 6.3.3 on page 6-8. Also
in both manuals take a read of the indirect addressing feature using FSR
and INDF. They can be utilized for the task also.

I know this may seem unfair, but I'm not going to answer your question, and
I hope that no one else will answer it either. This is information is that
is clearly documented. Frankly you would have saved a ton of time if you had
taken the time to look it up yourself.

You can't program microcontrollers without the documentation. You also must
read it. Get a copy of the documents above from the Microchip website, and
take a read of the sections. Then try it. Then come back if necessary and post
the relevant code and the results. In this way you will get a clearer
understanding of the process instead of simply asking and getting back a
code snippet.

I will give you one hint: bank switching for general purpose registers is
exactly the same process as setting the TRIS registers for the I/O ports for
ports D, and E (which are on an 16F874). Did you use ports D or E? If so then
how did you change the TRIS registers? It's the same process for general
purpose.

Good luck, and let us know how it comes out....

BAJ

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