HX711驱动程序

参考驱动程序（汇编）/*-------------------------------------------------------------------在ASM中调用:LCALLReaAD可以在C中调用:externunsignedlongReadAD(void);unsignedlongdata;data=ReadAD();----------------------------------------------------------------------*/PUBLICReadADHX711ROMsegmentcodersegHX711ROMsbitADDO=P1.5;sbitADSK=P0.0;/*--------------------------------------------------OUT:R4,R5,R6,R7R7=LSB如果在C中调用，不能修改R4，R5，R6，R7---------------------------------------------------*/ReadAD:CLRADSK//使能AD（PD_SCK置低）SETBADDO//51CPU准双向I/0输入使能JBADDO,$//判断AD转换是否结束，若未结束则等待否则开始读取MOVR4,#24ShiftOut:SETBADSK//PD_SCK置高（发送脉冲）NOPCLRADSK//PD_SCK置低MOVC,ADDO//读取数据（每次一位）XCHA,R7//移入数据RLCAXCHA,R7XCHA,R6RLCAXCHA,R6XCHA,R5RLCAXCHA,R5DJNZR4,ShiftOut//判断是否移入24BITSETBADSKNOPCLRADSKRETEND参考C程序：SbitADDO=P1^5;SbitADSK=P0^0;UndsignedlongReadCount(void){UnsignedlongCount;Unsignedchari;ADDO=1;ADSK=0;Count=0;While(ADDO);for(i=0;i24;i++){ADSK=1;Count=Count1;ADSK=0;if(ADDO)Count++;}ADSK=1;Count=Count^0x800000;ADSK=0;return(Count);}