单片机跟PC机通信 ................\tongxin ................\tongxin.c ................\tongxin.hex ................\tongxin.lnp ................\tongxin.LST ................\tongxin.M51 ................\tongxin.OBJ ................\tongxin.Opt ................\tongxin.plg ................\tongxin.Uv2 ................\tongxin_Opt.Bak ................\tongxin_Uv2.Bak