ORG 0030H
START:MOV P1, #03H ;为检测水位状态做准备
MOV A, P1 ;读入P1口的状态
JNB ACC.0, ONE ;P1.0=0,即B=0吗?不是0,转ONE
JB ACC.1, TWO ;P1.1=0,即C=0吗?是0,转TWO
BACK: ACALL D10S ;延时10秒
SJMP START ;循环检测
ONE: JNB ACC.1, THREE ;若P1.1=0,转THREE
CLR P1.3 ;P1.3输出0,启动报警装置
SETB P1.2 ;P1.2输出1,停止电机运转
SJMP $ ;等待,故障排除后,复位重新启
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