(1) Analyze the problem and determine the solution and algorithm;
(2) Allocate system resources and storage units;
(3) Draw a program flow chart;
(4) Design the program and repeatedly debug and modify it.
Keywords：MCU
Reference address：General steps of single chip microcomputer programming
(2) Allocate system resources and storage units;
(3) Draw a program flow chart;
(4) Design the program and repeatedly debug and modify it.
Colorful Light Cycle Design
ORG 0000H
MAIN: MOV P1, #80H ;D7 light
MOV P1, #40H ;D6 light
MOV P1, #20H ;D5 light
MOV P1, #10H ;D4 light
MOV P1, #08H ;D3 light
MOV P1, #04H ;D2 light
MOV P1, #02H ;D1 light
MOV P1, #01H ;D0 light
SJMP MAIN ; loop
ORG 0000H
MAIN: MOV A, #01H ; initial state
MOV R0, #08 ; 8 bits in total
L1: MOV P1, A ; D1 lights up
LCALL DEL ; delay subroutine
RL A ; state moves up 1 bit
DJNZ R0, L1; loop judgment
SJMP MAIN ; loop
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