systemjnitial(void) { TMOD=0x21; PCON=0x00; SCON=0x58; ES=1 ; PS=1; TH1=0x0E8; TL1=Ox0E8; TRl=1; EA=1; } //68H Address Control DataLen Datal Data2…DataN SumCheck 16H corn isp(void) interrupt 4 using 3 { if(RI) { RI=0; if(b-validFrame) { return; } if(m-frameStatus==0x00) { if(SBUF!=0x68) { m-frameStatus=0x00; } else { m-frameStatus=0x01; } } else if(m-frameStatus=0x01) { m-addrCode=SBUF; m-frameStatus=0x02; m-sysCheckData=0x00; } else if(mLframeStatus==0x02) { m-controlCode=SBUF; m-frameStatus=0x03; m-sysCheckData+=m-controlCode; } else if(m-frameStatus=== 0x03) { m-dataLen=SBUF; m-fxameStatus=0x04; m-sysCheckData+=rn-dataLen; m-dataFieldCount=0x00; } else if(m-frameStatus～0x04) { m-dataBuffer[m-dataFieldCount]=SBUF; m-sysCheckData+=m-dataBuffer[m-dataFieldCount]; m-dataFieldCount#; if(m-dataFieldCount==m-dataLen) { m-frameStatus=0x05; } } else if(m-frameStatus==0x05) { m-checkData=SBUF; if(m-sysCheckData != m-checkData) { m-fcameStatus=0x00; } else { m-frameStatus=0x06; } } else if(m-frameStatus=0x06) { m-frameEnd=SBUFs if(m-frameEnd!=0x16) { b-validFrame=0; } else { b-validFratne=1; } m-frameStatus=0x00; } }