OpenNAS: Open Source Neuromorphic Auditory Sensor HDL code generator for FPGA implementations

Abstract OpenNAS is an open-source tool for automatically generating the source files to create a Neuromorphic Auditory Sensor (NAS) VHDL project for FPGA. OpenNAS guides the user with a friendly interface that allows configuring the NAS’ parameters using a five-step wizard for code generation. OpenNAS provides support to several audio input interfaces (AC’97 audio codec, I2S-ADC and PDM microphones), different processing architectures (cascade and parallel), and neuromorphic output interfaces (parallel AER, SpiNNaker). After NAS generation, users have everything ready for building, simulating, and synthesizing the VHDL project for a target FPGA. OpenNAS is fully modular, which allows providing support to new features in an easy way.