基于vhdl的串口通信模块，即异步收发机，可实现单片机核fpga的收发串口通信，遵从rs232协议，已经调试过，很不错的资源,Vhdl-based serial communication module, that is, asynchronous transceiver can achieve single-chip transceiver nuclear fpga serial communication, rs232 to comply with the agreement, has been testing, it is a good resource