基于51单片机的方波产生程序，汇编语言是C语言，能够稳定输出双路脉冲-Based on 51 single square wave generator, assembly language is the C language, dual pulse output can be stabilized

用AT89C2051单片机的两路定时器实现两路6种频率的方波信号输出，根据按键选择改变频率-AT89C2051 microcontroller implemented using two two six kinds timer frequency square wave signal output, according to changes in the frequency button to select