单片机课程设计,倒计时控制蜂鸣器报警答:MAIN:MOV R1, #100 MOV R2,#100 LOOP: ACALL MUSIC AJMP LOOP MUSIC:MIC: MOV A,R1 MOV R3,A CPL P* ;蜂鸣器管教 NEXT: ACALL DELAY10MS DJNZ R3,NEXT DEC R1 DJNZ R2,MIC RET DELAY10MS:MOV R7,#6H DELAY0: MOV R6,#40H DELAY1: DJNZ R6,DELAY1 DJNZ R7,DELAY0...