AD1278的接口程序，Verilog的。包含TESTBENCH，仿真通过。尚未在硬件上调试。-the interface between fpga and ad1278,contain testbench.

这个程序实现AD采样芯片1278与FPGA的通信，按照datasheet上的时序编写。-This program implements 1278 AD sampling chip and FPGA communication, written in accordance with the timing on the datasheet.