基于Proasic3 startkit开发板，描述了8位地址锁存芯片74ls259和Uart接受模块，通过这两个模块来控制开发板上的led.-Based on the the ProASIC3 StartKit development board, describes the 8-bit address latch chip 74LS259 and the UART receiving module, to control development board led by these two m