Rotating the Bits of Accumulator 'Left', Assembly Language Instruction 'RL', Time Delay 0.125 Second
Rotating the Bits of Accumulator 'Left', Assembly Language Instruction 'RL', Time Delay 0.125 Second
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;Code Written by: Azhar Ahmed
; W W W . I A M T E C H N I C A L . C O M
;Crystal Frequency = 12MHz / 12 Machine Cycles = 1Mhz
;1/1MHz = 1 Microsecond
;(250 x 250 x 2 x 1Microsecond) x 1 time ACALL Delay = 0.125 Second
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ORG 0000H
MOV A,#80H ;Load 80H in HEX or 10000000B in Binary to Accumulator
MOV P1,A ;Load 80H in HEX or 100000000B in Binary at Port1
BACK: RL A ;Rotate The Bits of Accumulator Left i.e From Most Significant Bit to Least Significant Bit
;10000000
;00000001
;00000010
;00000100
;00001000
;00010000
;00100000
;01000000
MOV P1,A ;Load the Rotated Bits at the Port1
ACALL DELAY ;WAIT 0.125 Second
SJMP BACK ;Make This Operation to Run Repeatedly
DELAY:
MOV R0,#250 ;Initialize the R0 Register With an Immediate Value 250
NEXT:
MOV R1,#250 ;Load R0 With 250 Value to Repeat the Loop for 250 Times
AGAIN:
DJNZ R1,AGAIN ;Internal Loop Repeates 250 Times
DJNZ R0,NEXT ;External Loop Repeates 250 Times
RET ;Return to Caller
END ;End of .asm File
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