Message
Bit logic...
2005-06-12 by Roy E. Burrage
Toggle_A1: ; Toggles PB0 (A1) output state
LDI T1,1 ; Set bit 0 in T1
IN T2,PORTB
EOR T2,T1 ; XOR T1 and Port B (T2) to toggle PB0
OUT PORTB,T2
RET
This routine is called from the main program and could be performed a couple of other ways, but not anything shorter that I can see.
With the 8x31/32 series we had the CPL operation. With the er, uh, those other guys...we have BTG.
Anyone know of a shorter means, code wise, of doing this? Am I missing something, like a single operation?
REB