FPGA的代码verilog语言编写，包括LED与按键验证，数据选择器，编码器，译码器半加器，全加器，适合初学者，已经在板子调试成功，板子是 睿智IV开发板。-FPGA code verilog language, including LED and key authentication, data selection, encoder, decoder and a half adder, full adder, suitable for beginners, it has been succe