At 03:13 PM 3/30/03 -0500, shoppa_piclist@TRAILING-EDGE.COM wrote:
> > because you don't seem to realise that this goofy stuff is for your
> > *convenience*. In fact it's for your sanity.
>
>While I fully agree that mnemonic symbols are far superior to raw hex
>constants, I honestly don't feel that they've gone far enough.  For
>example, with MPASM (or the Gnu equivalent gpasm) I can gleefully
>set bit 5 in INTCON with a
>
>         BSF     INTCON,RP0

Andy Warren suggested a simple fix many years ago and it is how I currently
write my code:  I have my own set of include files that mirrors every
single bit in the special function registers.  For example, the above is
handled by

     #define _RP0 INTCON,RP0

within the include file.

You use it by referring to the alias:

     bsf      _RP0

Registers in different banks are handled with

     bsf     RB1(_T1IE)

where RB1 is a #define located at the start of my code:

<snippet from working code>
;other bit and register macro helpers

     #define BB1(reg,bit) (reg^0x80),(bit)   ;bit in bank 1
     #define RB1(reg) (reg^0x80)             ;reg in bank 1
;usage is:  bcf     BB1(_SOMEBIT)
;usage is:  movwf   RB1(SOMEREG)

     #define BNUM(reg,bit) (bit)        ;bit number within reg
     #define BIT(reg,bit) 1<<(bit)      ;bit within reg
     #define MASK(reg,bit) ~(1<<(bit))  ;bit mask within reg
     #define REG(reg,bit) (reg)         ;reg
;usage is:  movlw   BIT(_SOMEBIT)
;           do something
;           movwf   REG(_SOMEBIT)


Olin has a nicer method of dealing with banking issues that I intend to
adopt Real Soon Now (tm) - as soon as I get a chance.

dwayne

--
Dwayne Reid   <dwayner@planet.eon.net>
Trinity Electronics Systems Ltd    Edmonton, AB, CANADA
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