controlpaths.com

Ripple suppression circuit for PWM DAC.

If we are working with analog signals, is very common that we will need an analog level for set an offset if we are working with a bipolar signal, or maybe we will need an analog level to set a threshold. In these cases, the theory says that we will need a digital to analog converter, or DAC. DAC...

Published by P.Trujillo on Jan 31, 2022

Building a SoC with Litex.

There are many cases where we will need a processor inside our FPGA. In my case, soft cores are very useful when I have to implement in the FPGA a manager for an external device using high level interfaces like ethernet or modbus. For this interfaces we can find in the internet examples written i...

Published by P.Trujillo on Jan 17, 2022

Why FPGA?

This will be the first post of 2022, and I want it to be different. Time ago I have been thinking to write about how I started to use FPGA and also what I expect of them for the future. Likely, the thoughts that I am going to write in this post will change in the next year, but it would be intere...

Published by P.Trujillo on Jan 3, 2022

Getting started with Microchip’s FPGA Icicle Kit and PolarFire SoC.

In these rare days when getting a development board with a new FPGA is increasingly difficult, a new board has come into my hands. The board is the Icicle Kit, a Single Board Computer (SBC) from Microchip Technology. It is based on their PolarFire® SoC FPGA, the latest device released by Microchi...

Published by P.Trujillo on Dec 20, 2021

Discovering Gowin FPGA.

A few weeks ago Dialog Semiconductor announced a new series of FPGAs named ForgeFPGA. The highlight of these new devices are not high processing power, the highest speed or the big they are, the main highlights of these devices are Low-Power and Low-Cost. This kind of announcement shows us the wa...

Published by P.Trujillo on Dec 6, 2021

Single pole filter without multiplications.

When I am working in a design for an FPGA, which involves the acquisition of any signal, I usually have to design a filter before using that signal in the control loop, or a protection. If the use of this signal is critical, like the mentioned before, I usually have to design a filter consideri...

Published by P.Trujillo on Nov 22, 2021

Designing a filter on MATLAB and verifying it using FPGA-in-the-loop and Eclypse Z7

If I say “software for engineering”, most of you probably think of MATLAB. I don’t know if there is any field in engineering which does not have a package in MATLAB, and digital signal processing and FPGA design are certainly not among them. The package Signal processing Toolbox will give us all ...

Published by P.Trujillo on Nov 15, 2021

Application notes

[AN001] Designing from zero an IIR filter in Verilog using biquad structure and bilinear discretization.

Filtering is likely the most common DSP algorithm that any embedded engineer has to design, no matter it they are developing for an STM32, or TI DSP or, of course, en FPGA. Filtering is such important because the majority of the applications are connected to the real world, so they need to captur...