传统的51单片机驱动打印机的程序，通过串口即可实现灵活的控制-51 traditional printer driver program, to achieve flexible control through the serial port.

用C#编写的串口调试软件，下位机在STM32上测试通过，下位机发送数据的格式如printf("%s%f%s%f%s",":"x1":"x2":")单片机串口发送数据(Written in C# serial debugging software, the lower computer on the STM32 test passed, the lower machine to send data format, su