View Full Version : Declaring word-variables in bank15 on a pic18f2431 ?
BigWumpus
- 25th October 2006, 09:10
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
- 25th October 2006, 09:43
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
- 25th October 2006, 17:11
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
- 25th October 2006, 18:19
I take Darrels way !!!! This is what I'm looking for !
Darrel Taylor
- 25th October 2006, 21:57
WooHoo! :D
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
- 25th October 2006, 22:32
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..:o
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