By manually inputting single pulses to the /INT0 of the 8051 microcontroller one by one, an interrupt is requested to the microcontroller.
Each time the microcontroller interrupts, it outputs 55H, AAH, 55H, AAH, etc. to port P1 in sequence.
;==============================================
Best answer: The following program, after debugging, fully meets the requirements of the question.
ORG 0000H
LJMP START
XRL P1, #255 JNB
P3.2, $
RETI
START: SETB
IT0 SETB
EX0
SETB EA
MOV P1, #55H SJMP
$
END
;
= ...
Only by writing programs in assembly language can such a refined level be achieved.
Some people write programs in C and find that after compiling, the storage space of the microcontroller chip is not enough.
It is recommended that you should master assembly language in order to rise to a higher level.
;==============================================
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