异步的fifo,写时钟和读时钟相互独立，能够对数据进行缓存处理。希望对大家有用-Asynchronous fifo, write clock and the read clock independent of each other, capable of processing the data cache. I hope useful

同步FIFO设计源代码，带有复位信号的同步FIFO设计，能够在同一个时钟域范围内写入读出数据，从而做到传递数据的功效。-Synchronous FIFO design source code, synchronous FIFO design with a reset signal, can write and read data in the same clock domain range, so do efficacy data transfer.