Declaring word-variables in bank15 on a pic18f2431 ?

[BigWumpus]

Hello,
I want to use the 16-bit-values inside CAP1BUFL & CAP1BUFH in PBP.

I wrote:

CAP1BUF Var word $F68

the resulting error says, the declaration is "out of bounds".
So I changed the file 18f2431.bas and inserted:

bank15 $0F60, $0FFF

and I know, it's dangerous !

How can it be made the right way ???

[sayzer]

Hi BigWumpus,

Did you try it without declaring a specific bank location?

As much as I can remember, a word variable can not fit into BANK15 .

Just a small glint I had in my mind


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Edit: Also,

<img src="http://img4.picsplace.to/img4/26/err_001.JPG" alt="Image Hosting by PicsPlace.to" >


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[Bruce]

You don't need to do anything special with PBP to access special function
registers. Just use the register name like you would with any other part.

You have several options;

    CAPBUF VAR WORD
    CAPBUF = 0
    
    @CAP1Buffer = CAP1BUFL
    CAP1Buffer VAR WORD EXT
    
    CAP1BUFL = 10
    CAP1BUFH = 88

Main:

WithPBP:
    CAPBUF.LowByte = CAP1BUFL    ' low byte
    CAPBUF.HighByte = CAP1BUFH   ' high byte
    GOTO Main
    
TheDarrelWay:
    CAPBUF = CAP1Buffer
    GOTO Main
    
' Or in asembler.

TheMovffWay: 
    @ MOVFF CAP1BUFL, _CAPBUF   ; low byte
    @ MOVFF CAP1BUFH, _CAPBUF+1 ; high byte
    GOTO Main

TheLongWay: ' banked method
    @ MOVLB 0x0F            ; point to bank 15
    @ MOVF CAP1BUFL,W       ; low byte
    @ MOVWF _CAPBUF,ACCESS
    @ MOVF CAP1BUFH,W       ; high byte
    @ MOVWF _CAPBUF+1,ACCESS
    GOTO Main

[BigWumpus]

I take Darrels way !!!! This is what I'm looking for !

[Darrel Taylor]

WooHoo!

Don't know if you're using more than 1 of them, but if you want to access all 3 as an array, you can also do something like this...

@CAP = CAP3BUFL
CAP    VAR WORD EXT
CAPBUF VAR WORD
Index  VAR BYTE 

FOR Index = 1 to 3
    CAPBUF = CAP(3-Index)
    HSEROUT ["CAP",DEC1 Index,"= ",DEC CAPBUF,13,10] 
NEXT Index

It would have been easier if they hadn't put them in reverse order in RAM.

[Bruce]

I take Darrels way !!!! This is what I'm looking for !

I hear ya..! Mr. Wizard, err, Darrel, comes up with some pretty handy
stuff..