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Trying to hack a garage door opener with the USRP B210.

When we think about radio signals, we often think that all of them are private, impossible to decode, complicated… but nothing far than reality. It is true that acquire radio signals needs some knowledge about communications but now a days, all of the knowledge needed to acquire a radio signal is...

Published by P.Trujillo on Sep 12, 2022

F4PGA and Project XRAY.

When I think about Open Source, the first that comes to my mind is GNU/Linux. This operating system was developed by Linus Torvalds and Richard Stallman in the early 90’s, then all the code was released to the community. Now, this first operating system has grown, and we can find many different o...

Published by P.Trujillo on Aug 29, 2022

How to find documentation about DSP and FPGA.

Sometimes I receive emails or direct messages on LinkedIn from readers asking me about where they can find documentation about DSP, FPGA or both together. Unfortunately, I did’t find webpages where talk about how to make dsp on an FPGA, but there are a several webpages. that I check for some of m...

Published by P.Trujillo on Jul 30, 2022

True RMS compute in FPGA.

When we are designing an acquisition system, sometimes process the signal is not enough, there are many cases where the project requires that the value of a measurement must be shown in a user interface. This is very easy when we are working with DC signals, since we can send to the display the v...

Published by P.Trujillo on Jul 18, 2022

Adding the Digilent USB104 A7 board to Litex.

In this blog we already talk about Litex in this post, and also we used Litex to run Linux in a SoC in this post. If we remember the flow, the steps are very simple. We need to execute some Python scripts in order to generate the HDL code. Then, that HDL design will be implemented using Vivado, Y...

Published by P.Trujillo on Jul 4, 2022

Division algorithms in FPGA.

Digital signal processing involves many different operations. Although there are some algorithms with a high level of digitalization, they can be computed only with additions and shifts, others require specific hardware. For example, we need multiplicators to use an IIR filter, since the input an...

Published by P.Trujillo on Jun 20, 2022

How to use a digital oscilloscope.

When we is studying a degree related with electricity (electronics, electronics, electrical, communications, …), one of the elements which is very familiar to us is the oscilloscope. I remember when I started my electronics course (here in Spain we call it professional degree), we used analog o...

Published by P.Trujillo on Jun 20, 2022

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...