接收代码:

对接收数据的采样频率：16X9600HZ

接收代码编写思路：

首先判断起始位,没有数据传输时，起始位为“1”的状态，当有数据时起始位为“0”。因为采样的频率是通信频率的16倍，所以当连续8次（数据位正中间）采集为“0”时就认为是有数据到来。那么可以开始采集数据位，以后每隔16个脉冲采集一个数据（每个数据的正中央，不易发生畸变的部分），连续采样8次，即完成数据位的采集。最后实现串并转换。如此重复即可。（因为通信已经预约好，停止位和校验位都为“1”，不会对数据产生影响。）

发送端代码编写思路：

先判断发送闲忙，如果发送的线路空闲，便可以读入数据，读入时就对数据加起始位“0”。因为数据是并行输入的，必须按位去取，形成串行数据，这时的数据位数变为9位，再给这些数据加上校验位“1”和停止位“1”即可。最后11位数据按位输出。完成发送。

程序部分也有一定说明或注释.

-Receive code:

Sampling frequency of the received data: 16X9600HZ

Receive coding ideas:

Analyzing first start bit, the start bit is "1" state when no data is transmitted, when the data start bit is "0". Because the sampling frequency is 16 times the communication frequency, so that it is collected eight consecutive times (data bit is in the middle) to "0" when data soon. Can begin collecting data bits, a collection of data (the middle of each data after every 16 pulses, less prone to distortion of the part), 8 consecutive samples, i.e. to complete the acquisition of the data bit. Finally realize the serial-to-parallel conversion. So can be repeated. (Because the communication has an appointment, stop bits and parity bits are "1", the data will not have an impact.)

Sender coding ideas:

First determine Send Free Busy, if the transmission line is idle, you can read the data read in the data start bit "0". Because the data is parallel input, serial data bit and get to form, when the nu