Реферат Мікропроцесорна техніка

cseg

org 2000h

jmp main

org 200Bh

jmp timer

main:

mov TMOD, # 01h

mov IE, # 10000010b

mov TL0, # LOW (555)

mov TH0, # HIGH (555)

mov DPTR, # 0FFF7h

mov A, # 1

mov R2, # 1

mov R1, # 0

call get_n

movx @ DPTR, A

setb TR0

loop:

mov DPTR, # 0FFF1h

movx @ DPTR, A

quit:

cjne R1, # 0, two

mov dptr, # 0FFF2h

movx A, @ DPTR

jmp loop

two:

cjne R1, # 1, three

mov dptr, # 0FFF2h

movx A, @ DPTR

cpl Acc.0

cpl Acc.1

cpl Acc.2

cpl Acc.3

jmp loop

three:

cjne R1, # 2, fore

mov dptr, # 0FFF2h

movx A, @ DPTR

cpl Acc.4

cpl Acc.5

cpl Acc.6

cpl Acc.7

jmp loop

fore:

cjne R1, # 3, loop

mov dptr, # 0FFF2h

movx A, @ DPTR

cpl A

jmp loop