本程序为Franklin/keil C51源程序，可以在所有51系列（或兼容）单片机中运行 程序中给出了设计方法,通过修改TIMEth使本程序适用于各种晶振及各种波特率.(This program is a franklin/keil c51 source program, can run in all 51 series (or compatible) single chip computer program gives the design method, through modifying