网上看到 这样一段程序:
LDI WDT,00H
LDA PORTD,00H
BA1 $-2
LDI WDT,00H
LDA PORTD,00H
BA1 $+2
JMP $-3
LDI T4,0AH
LDI WDT,00H
SBIM T4,01H
LDI T0,04H
LDI T1,08H
NOP
NOP
BC $-6
LDA PORTD,00H
STA TMP_D0,00H
ANDIM TMP_D0,07H
EORIM TMP_D0,07H
BAZ $+2
JMP PHASE3
LDI WDT,00H
LDA PORTD,00H
BA2 $-2
LDI WDT,00H
LDA PORTD,00H
BA2 $+2
这段程序起什么作用呢? |