首先判断k3是否按下，当k3按下时，将寄存器6Eh～69H里面的内容1.2.3.4.5.6六个数字通过max232发送出去。后台显示可用windows自带的超级终端。-first judge whether the press, when the press 05110, to register 69H 6Eh ~ 2 inside the six figures issued by max232 send out. Background indicates windows onboard the Super Terminal.