luis wrote :

> I=B4m starting to change the mid range family 16Fxxx for the=20
PIC18F4520.

> In my first attempt, I will use the internal oscilator and=20
> the pins osc1 and osc2 like I/O.
> Well, I didn=B4t do this work yet.=20
> I get the manual section 23.0 page 249.
> Just to start with, and using asm language, I would like to=20
> get a simple example how to initialize the configuration word.

First, the latest MPLAB has introduced a new method
to specify the config parameters.

Check the readme file for MPASM in that kit.

This new method is oly for the PIC18 line.
Well, maybe for the dsPIC30 also, I'm not sure...

So the actual syntax is depending on if your're
using the latest MPLAB (7.20 if I'm not wrong).

Now, I think the old syntax still works, but since you're
right in the middle of a family switch anyway, you can just
as well start with the new syntax (which is simpler to use).

>From the MPASM readme file :

"The __CONFIG directive has been deprecated for all other PIC18
devices. A warning will be issued if the __CONFIG directive is used
with one of these devices. Use the CONFIG directive instead."

Also see the last part of P18F4520.INC (still, if you have at least
MPALB 7.20 installed).

And at last, look up the CONFIG (*not* __CONFIG !) in the
online help for MPASM. In there there is an example thet looks
like this :



#include p18f452.inc        ;Include standard header file
                            ;for the selected device.
;code protect disabled
CONFIG     CP0=3DOFF
;Oscillator switch enabled, RC oscillator with OSC2 as I/O pin.
CONFIG     OSCS=3DON, OSC=3DLP
;Brown-OutReset enabled, BOR Voltage is 2.5v
CONFIG     BOR=3DON, BORV=3D25
;Watch Dog Timer enable, Watch Dog Timer PostScaler count - 1:128
CONFIG     WDT=3DON, WDTPS=3D128
;CCP2 pin Mux enabled
CONFIG     CCP2MUX=3DON
;Stack over/underflow Reset enabled
CONFIG     STVR=3DON


Jan-erik.
>=20
> Anybody could help me
>=20
> Thanks in advanced.
>=20
> Luis F.
> --=20
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>=20




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