Some simple FPGA stuff


Some articles and links of interest


State Machines

Becoming a State Machine Design Mastermind

Verilog IceStorm Series

Learning Verilog for FPGAs: The Tools and Building an Adder

Learning Verilog for FPGAs: Flip Flops

Opencores UART and PWM

Taking the Pulse (Width Modulation) of an FPGA


Xilinx FPGAs in C for Free

Bitonic Sort on FPGA

Sort Faster with FPGAs

FPGA motion planning

Manipulators get a 1000x FPGA-based speed bump


Gravity Simulations With An FPGA

The seller of the Cyclone IV RZ-EasyFPGA A2.1 had the following pinout on the page. I paid about 35$ and it took maybe 3 weeks to get here from china.

It came with a usb blaster programmer. and some usb cables. It can be powered from usb or from a 5 volt supply. I also got a camera.

This is better than the cyclone II chip I had before. More logic units, and I can use the newest version of Quartus II 16.1.  I like having some accessories on board




So I have a couple boards now.

Make a new project. Select Cyclone IV E series. EP4CE6E22C8 is the right chip. EP4CE6E22C8N is what the seller says. What does the N mean?

Here is a very simple counter. The clk is 50Mhz clock so I attached bits 25 to the leds in the pin assignment. That should be slow enough for me to see.

make a new verilog file with the same name as the project. This is the top level design file



In the programmer window select the .sof file in the output folder .

Works. Sweet.

Now let’s try getting those LED digits up

Useful reference

The Dig signal needs to be clocked? It probably accepts on a positive edge or something. No. The dig signal is active low. I probably need to have the thing cycle through really fast. There is probably no memory in the led unit


The display is inverted. 0 is on and 1 is off


This should print a 2 on the first digit.


I went to opencores and got a simple UART core

Put it in the project directory. Add all the files to the porject. Make the loopback example the top level design by right clicking,simple_uart_for_fpga

Fired up arduino ide serial monitor. Yup. It’s looping back characters. Nice.







One thought on “Some simple FPGA stuff”

  1. Hi,

    I am using Quatrus Prime Lite Edition. I need to make Pin Assignment for board. How did you do for this board RZ-EasyFPGA A2.1 ?

    How did you used it with Altera Quatrus Prime Lite Edition

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