求个89c51单片机 汇编语言设计的LED跑马灯的程序答:查询方式:ORG 0000H AJMP MAIN MAIN:MOV P1,#01H MOV R0,#8 MOV A,P1 XU: RL A MOV P1,A ACALL DELAY DJNZ R0,XU AJMP MAIN DELAY:MOV R0,#0FFH ONE:MOV R1,#0FFH TWO:MOV R2,#02H THE:DJNZ R2,THE DJNZ R1,TWO DJNZ R0,ONE(将近1S)RET END 中断方式:org 0000h ;程序...
一道简单的单片机习题,要求用汇编语言!答:MAIN:mov R1,#20h mov R2,#10 mov 50h,#0 lop1:mov a,@R1 cjne a,#80h,$+3 jnc lop3 cjne a,50h,$+3 jc lop3 mov 50h,a lop3:inc R1 djnz R2,lop1 JMP