一般单片机只有Uart0和Uart1两个串口，在实际工程中，可能会用到3个或以上的串口，该资料介绍如何实现软件Uart-General Singlechip only two serial ports UART0 and Uart1, in practical engineering, may be used three or more serial ports, the information on how to achieve software UART

单片机课程教学的实践性环节强, 用Proteus软件虚拟单片机, 具有系统资源丰富、硬件投入少、形象直观等优点, 能更好地培养学生解决实际工程问题的能力。广泛应用后, 可以提高教学效果。-Teaching practical aspects of MCU strong, with the Proteus software virtual microcontroller, with the system is rich in resources, hardware, less investment