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This may have been covered elsewhere, but I'm having trouble figuring out how to access the High and Low Bytes of 16-bit Words in Assembler. I know I can point the FSR register at the _Variable to get the Low byte, add one, and get the High byte, but I was wondering if there was an easier more straightforward way.
Also, I'm using the PM assembler, and I'm wondering if there is an equivalent for banksel?
YOU CAN USE THIS. I USE THIS METHODE WITH LONG VARIABLES. THERE IS NO PROBLEM.Code:
MYVAR VAR WORD
MYVAR_L VAR MYVAR.lowbyte
MYVAR_H VAR MYVAR.highbyte
ASM
CLRF _MYVAR_L
CLRF _MYVAR_H
ENDASM
Thank you very much! I'm surprised I didn't think of that.
Now comes the next question.
Is there a "banksel" function equivalent in PM assembler?
NO THERE ISNT ANY EQUIVALENT FUNCTION.Code:
Is there a "banksel" function equivalent in PM assembler?
I KNOW THAT , PIC BASIC PRO MAKES THE BANKSEL FUNCTION ITSELF.
I'm trying to use inline Assembler, but I use multiple arrays which means I need to address multiple banks. How can I tell which bank a given array is stored in?
Also, I'm not certain how you mean that banksel is produced by PM itself. I'm using 2.5, and it's choking on errors - all related to my attempts to use banksel.
This may all be simplified if I just specify which bank I want each variable in.
Quote:
Originally Posted by The Altruist
You can use the CHK?RP macro to locate the bank for any variable.Code:MyWord VAR WORD BANK0
ASM
movf _MyWord,w ; this gets the LowByte
movwf PORTB
movf _MyWord + 1,w ; this gets the HighByte
movwf PORTC
ENDASM
But if you're accessing arrays, it's probably better to use an FSR/INDF.
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