Help, problems first time with 18F452 PIC

[MikeTamu]

Update:

After struggling with this problem for half a day, I have learned my lesson well. In Melabs Programmer, XT was the selected speed mode whereas HS should of been for 10 Mhz. Doh!

[sougata]

Hi there,

Did you know that you can run your PIC18F452 @ 40MHz using the same 10MHz resonator! The config is then HS_PLL (It does a x4 PLL multiply)

Happy PICing

Regards

Sougata

[MikeTamu]

Wow, I didn't know that. Thanks.

Where do I put this 'config' command and what is the full command to use?

Also, does PBP know that I will be doing this and adjust its pause times accordingly?


Thanks.

[sougata]

Hi there,

As far as I remember Melanie did give a full reference on the @config issues. I do it in a different way. I edited the 18F452.inc file in the pbp folder and change the XT_OSC to HS_PLL. Actually I run almost all my 18F452 @40MHz. That gives me fastest running code however practical serial communication is limited to 9.6K. Higher rates yield high baud rate error. BTW a simple define "DEFINE osc 40" will make your timing correct under PBP. Keep exploring.

Regards

Sougata