verilog教程，更加偏向工程化的verilog实用教程，有很多实际模块，推荐(Verilog tutorial, more biased toward the engineering of the Verilog practical tutorial, there are many practical modules, recommended)

南京沁源的键盘显示接口芯片示例程序，非常好用，值得推荐，刚在项目中用过