模拟RS-232串口产生周期串口数据，可以根据需要修改周期参数，及时钟参数，代码可以直接用来产生需要波特率的通讯模拟数据。-Analog RS-232 serial port generates cycle serial data, based on the need to modify the cycle parameters, and clock parameters, the code can be directly used to generate analog data communi