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Question 4.5: A switch is connected to pin P1.7. Write a program to check ...

A switch is connected to pin P1.7. Write a program to check the status of SW and perform the following:
(a) If SW=0, send letter ‘N’ to P2
(b) If SW=1, send letter ‘Y’′ to P2

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SETB   P1.7        ;make P1.7 an input

AGAIN:        JB P1.2,OVER    ;jump if P1.7=1

MOV   P2,#′N′  ;SW=0, issue ′N′ to P2
SJMP  AGAIN  ;keep monitoring

OVER:          MOV   P2,#′Y′   ;SW=1, issue ′Y′ to P2

SJMP  AGAIN  ;keep monitoring

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