Adding windows to xFFT IP.

Digital signal processing algorithms are, in general, purely mathematical algorithms that works perfectly on our notebook or MATLAB, but in real design, the algorithm starts to return us some unexpected results. One example of that is the quantification error. While in MATLAB we have a floating p...

Published by P.Trujillo on May 31, 2021

Implementing a FIR filter using folding.

In this blog we have seen how to develop an FIR filter. In this post you have an example of FIR filter where the coefficients are configured through AXI4-Lite interface. The goal of that post was the implementation of a configurable digital signal processing algorithm on the edge, without focusin...

Published by P.Trujillo on May 17, 2021

Discovering the SmartFusion® 2 SoC.

Several years ago, electronic designs began to feature System on a Chip (SoC) technology. This technology is an excellent choice for designs that require a higher integration or a reduction in Bill of Materials (BOM) cost. On this blog we have seen how, by combining a powerful processor like Arm ...

Published by P.Trujillo on May 3, 2021

Implementing a digital biquad filter in Verilog.

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

Published by P.Trujillo on Apr 19, 2021

Managing AXI4-Stream from MATLAB.

For developers who work with FPGA and digital signal processing, and for signal processing, I mean audio signals, video signals, and radio signals, … sure they have used the AXI4-Stream protocol. The AXI4-Stream protocol is used as a standard interface to connect components that want to exchange ...

Published by P.Trujillo on Apr 5, 2021

Development boards I use.

Many times, developers who want to take their first steps in the world of FPGAs to ask me about a development board that begins to test their first designs. From the newie point of view, I understand that seeing a led blinking can be very satisfying, but from my point of view, is more interesting...

Published by on Mar 22, 2021

Using IIO to manage an ADC from Petalinux.

Managing an ADC is something that any engineer dedicated to signal processing has to do very often. This task, in general, use to be no much complicated, unless you are using a high-speed ADC with LVDS interface or something similar, but that kind of ADCs are not the scope of this post. In this p...

Published by P.Trujillo on Mar 8, 2021