Configuration of 18F268x

[Mike2545]

I am currently working on a project with an 18F4550. 32k seemed like it would be enough program memory ... I purchased some 18F2682, 18F2680 and 18F2685, because of their enormous program memory. However, simple Serin2 & Serout2, SDA & SCL do not work.

I did set the OSC in the 18F2680 as such

INCLUDE "P18F2680.INC"    ; MPASM  Header
        __CONFIG    _CONFIG1H,  _OSC_IRCIO67_1H 
        __CONFIG    _CONFIG2H, _WDT_ON_2H & _WDTPS_128_2H
        __CONFIG    _CONFIG3H, _PBADEN_OFF_3H & _LPT1OSC_OFF_3H & _MCLRE_ON_3H
        __CONFIG    _CONFIG4L, _LVP_OFF_4L
        NOLIST

But even such statements like PORTB.1=1 do nothing...
I have the INCLUDE "ALLDIGITAL.pbp"

Any help would be great.

Mike

[Darrel Taylor]

Are you writing in assembly language or PicBasic Pro?
If PicBasic Pro, you should not include the MPASM header.

Since MCLRE is ON, do you have a pull-up resistor on the MCLR pin?

[Mike2545]

Are you writing in assembly language or PicBasic Pro?
If PicBasic Pro, you should not include the MPASM header.

Since MCLRE is ON, do you have a pull-up resistor on the MCLR pin?

I am writing the program in PicBasic Pro... the above [code] is from the PBP file in my C drive.
Yes I have a pull up resistor/diode on my MCLR

[Darrel Taylor]

Oh, you're modifying the 18F2680.inc file in your PBP folder, of an older version of PBP.

_OSC_RCIO_1H is for an external RC oscillator.
Do you have a resistor/capacitor circuit on your OSC pin?

Or did you really want the Internal oscillator?
_OSC_IRCIO67_1H

You should also have _XINST_OFF_4L since PBP cannot use the extended instruction set.

Try them like this ...

        __CONFIG    _CONFIG1H, _OSC_IRCIO67_1H & _FCMEN_OFF_1H & _IESO_OFF_1H
        __CONFIG    _CONFIG2H, _WDT_ON_2H & _WDTPS_512_2H
        __CONFIG    _CONFIG3H, _PBADEN_OFF_3H & _LPT1OSC_OFF_3H & _MCLRE_ON_3H
        __CONFIG    _CONFIG4L,  _STVREN_ON_4L & _LVP_OFF_4L & _BBSIZ_1024_4L & _XINST_OFF_4L

Don't forget to set the OSCCON register or it will be running at the default 1Mhz.

[Mike2545]

Thank you, Thank you, & Thank you! Worked like a charm, I just moved some ports around and it took right off.
Could you help me out with the Config fuses for the 18F2682 and 18F2685 while we are at it?

[Darrel Taylor]

I think they will be the same.

But you might want to verify them in the bottom of the P18F2682.inc and P18F2685.inc files in your C:\Program Files\Microchip\MPASM Suite folder.

C:\Program Files (x86)\Microchip\MPASM Suite - for 64-bit systems.

[Mike2545]

Ah yes...Nice to have the elbow room of 96K (program memory). At least this way I can start big and choose the correct size after I am done. Thanks again for your help.
I have been getting better at finding just such information in the 400+ page data sheets