This example provides a basic communication between USART1 and USART2 using DMA capability, flags and interrupts.

了解ISE平台的基本环境，编译程序，在MC8051 IP核中，要求实现：增加PLL锁相环，扩大内部RAM，定时器，串口和外部中断等资源，并增加乘法器和除法器的功能。-ISE platform to understand the basic environment, compiler, the MC8051 IP core, the requirement to achieve: increased PLL phase-locked loop, expanding the internal RAM