ADC-DAC transmittion works thru SPI on 25 MHZ. Used for some student project on Xilinx sprtan3a FPGA

XAPP800SPICPLD源码参考设计-THIS DESIGN IS PROVIDED TO YOU AS IS . XILINX MAKES AND YOU RECEIVE NO WARRANTIES OR CONDITIONS, EXPRESS, IMPLIED, STATUTORY OR OTHERWISE, AND XILINX SPECIFICALLY DISCLAIMS ANY IMPLIED WARRANTIES OF MERCHANTABILITY, NON-INFRINGE

通过Cypress的EZ-USB FX3的SPI接口对Xilinx FPGA进行配置(AN84868 shows you how to configure a Xilinx FPGA over a slave serial interface using FX3 which is the next-generation USB 3.0 peripheral controller.)

Verilog implementation of an SPI slave interface. Intially targetted for Atlys devkit (Xilinx Spartan-6) controlled by TotalPhase Cheetah USB/SPI adapter