基于89s52的c51串口通信源程序

串口的4种工作方式对应着三种波特率模式：



对于工作在方式1和方式3，波特率由定时器/计数器1T1的溢出率和SMOD（PCON（电源控制寄存器）D7位）决定，-Based on the C51 serial communication 89s52 source of the four kinds of serial work corresponds to the baud rate of three modes: Mode 1 for the work and methods 3, the baud rate by a timer/counter overflow 1T1 rate and SMOD (PCON (power control register) D7 bit) decision