Modbus_rtu源码 unsigned char addrlh_217; //寄存器地址次低字符 unsigned char addrll_217; //最低字符 unsigned char addrl_217; //寄存器地址 unsigned char datahh_217; //要预置的状态最高字符 unsigned char datahl_217; //要预置的状态次高字符 unsigned char datah_217; //转换为的10进制数 unsigned char datalh_217; //要预置的状态的次低字符 unsigned char datall_217; //要预置的状态的最低字符