piclist 2003\03\02\161352a
>
Thread:
coding challenge: await
www.piclist.com/techref/microchip/devices.htm?key=pic
BY
:
Tony Kübekemail (remove spam text)
Hi,
I haven't read most if this thread so at the moment I have no
code to post, however I saw this bit from Scott Dattalo:
<snip>
>Here's a solution that saves one instruction:
>
> rlf TMR1L,W ; read the msb of tmr1L --> Carry
> incf TMR1H,W ;Assume that the low byte is about to
rollover
> movwf TMR1H_buff
>
> movf TMR1L,W
> movwf TMR1L_buff
>
> skpnc ;If TMR1L on the first read was < 0x80
> btfsc TMR1L_buff,7 ;or if the both reads are between
> decf TMR1H_buff,F ;0x80 and 0xff then leave the high byte alone
Wouldn't the "incf TMR1H,W " possibly trash the carry ? (if TMR1H is
0xFF)
/Tony
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