Design Flowīefore we get into the Vivado I wanted to give a short introduction of how we 'program' the FPGA. Nonetheless, the official digilent reference manual can be found here. I won't go into listing all the features of the FPGA chip here at once, instead I will be referencing them throughout the blog. The FPGAs clock is run by a 12MHz external crystal oscillator. The board is comes packaged with a triple output buck power regulator capable of supplying three different voltage levels. Interfacing with the board is generally done through USB, interfaced via an onboard FTDI chip (located close to the USB). Additionally the, board comes with a PMOD connector, USB port, and a SPI flash. Getting Familiar with the Board (CMOD S7)ĭigilent's CMOD S7 is a development board hosting a Xilinx Spartan 7 (XC7S25-1CSGA225C) FPGA, tighly integrated with the appropriate number of onboard LEDs and buttons while exposing the rest of the IO via the 4x 7 DIP headers. I will be using Verilog as my HDL throughout and discuss a few concepts along the way. Even though I studied Logic Design using HDL in college I never actually got into hardware implementation. This is also my first time using an actual living (not really) breathing (also not really) FPGA.

I have written this blog in response to the 'Summer of FPGA' challenge, and being my first blog on the platform I wanted to describe my experience with the Digilent CMOD S7 board before going into making my LiFi project come to life.

Getting Familiar with the Board (CMOD S7).

Verilog hdl program for half subtractor