从这两段单片机汇编程序来看,RR,RL和RRC,RLC在这里区别不大,是吗?
从P1.0,P1.1,,,,,,P1.7,P1.6,,,,P1.0循环.
1.
===========================
ORG 0
START:MOV R2,#8
MOV A,#0FEH
SETB C;带进位
LOOP:MOV P1,A
LCALL DELAY
RLC A
DJNZ R2,LOOP
MOV R2,#8
LOOP1:MOV P1,A
LCALL DELAY
RRC A
DJNZ R2,LOOP1
LJMP START
DELAY:MOV R5,#248
D1:MOV R6,#248
D2:MOV R7,#248
DJNZ R7,$
DJNZ R6,D2
DJNZ R5,D1
RET
END
=============================
2.
ORG 0
START:
MOV R2,#8
MOV A,#0FEH;1111 1110
LOOP1:
MOV P1,A
RL A
LCALL DELAY
DJNZ R2,LOOP1
MOV R2,#8
MOV A,#7FH;0111 1111
LOOP2:
MOV P1,A
RR A
LCALL DELAY
DJNZ R2,LOOP2
LJMP START
DELAY:
MOV R5,#245
D1:MOV R6,#245
D2:MOV R7,#245
DJNZ R7,$
DJNZ R6,D2
DJNZ R5,D1
RET
END