After PYNQ RFSOCWORKSHOP, Xilinx launched DSP-PYNQ again, unlike the previously released Overlay and Notebooks based on the RFSOC2X2 development kit. The project released this time has added support for ZCU111 and Ultra96.

Overlay

Developers can quickly install Overlay through simple commands and officially open a PYNQ -based digital signal processing journey.

# PYNQ v2.4.1 v2.5
pip3 install https://github.com/Xilinx/DSP-PYNQ/releases/download/v1.0_$BOARD/dsp_pynq-1.0-py3-none-any.whl


# PYNQ v2.6
pip3 install https://github.com/Xilinx/DSP-PYNQ/releases/download/v2.0_$BOARD/dsp_pynq-2.0-py3-none-any.whl


python3 -c 'import dsp_pynq; dsp_pynq.install_notebooks()'

Notebooks

DSP-PYNQ released a total of two Notebooks related to digital signal processing. These Notebooks can help developers quickly familiarize and understand how to use Python and PYNQ to develop digital signal processing (DSP) applications. Among them, the first notebook is the DSP and Python entered the door application around the digital signal processing function. On the first basis of the first notebook, the FFT and FIR processing are moved to the PL end for acceleration processing.

notebook 1: Scottish bird recording analysis

In this example application, we will start with some interesting signals of visualization -the recording of Scottish birds! This recording contains the sound of two different frequencies. We will use some different analytical technologies to understand these signals, and finally process the audio to separate a single type of birds.

• Introduce SCIPY ECOSYSTEM, including scipy.signal for DSP operations and Numpy for array.

• • Get the sampling frequency, sample array type, sample data format, data length and other information.

  • Use SCIPY to perform FFT operations on the original sample data.

    time domain signal

    frequency domain signal

  • Use SCIPY design FIR filter and verify its frequency response.

    FIR frequency response

  • Use a FIR filter to filter the original signal.

    FIR filtering before spectrum

    FIR filtering spectrum

• Use plotly_express and pandas dataframe to achieve visual operation. It can freely use the drawing to use the drawing to save the drawing.

Notebook2: Use FPGA to achieve hardware acceleration

In this example application, we will use the same SCIPY technology to analyze and record audio with two types of bird sounds, and use a filter to separate one of the sounds. However, this time we will move the FFT and FIR functions of the software to the FPGA terminal to achieve hardware acceleration, while using PYNQ to control it.

• Use logicorefir compiler and logicirefft to build hardware acceleration logic.

  hardware design

• Use AXI DMA to share the PL -end Memory sharing with PS.

• Use Python to build a control function for FPGA hardware, and transmit data and configuration information through DMA to achieve the ON-the-Fly reuse and function implementation of the FFT and FIR IP cores.

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