程序功能：

1，16位定时器0，工作在方式1，定时1秒。

2，8位自动重装定时器2，工作在方式2，产生波特率为9600.

3，串口工作方式1，10位异步发送，定时一秒循环发送1，2，3，4，5.

4，使能串口中断，收到任何数据立即转发出去。-Program features: 1,16-bit timer 0, 1 working in the manner, time 1 sec. 2,8-bit auto-reload timer 2, work in the way of 2 to produce the baud rate is 9600.3, 1,10-bit asynchronous serial port to send work, time to send a second cycle of 1,2,3,4,5. 4, enable serial port interrupt, receive any data transmitted out immediately.