基于Syntiant TinyML Board与Edge Impulse的LED语音控制的工程文件

<!--- # Copyright (c) 2021 Syntiant Corp. All rights reserved. # Contact at http://www.syntiant.com # # This software is available to you under a choice of one of two licenses. # You may choose to be licensed under the terms of the GNU General Public # License (GPL) Version 2, available from the file LICENSE in the main # directory of this source tree, or the OpenIB.org BSD license below. Any # code involving Linux software will require selection of the GNU General # Public License (GPL) Version 2. # # OPENIB.ORG BSD LICENSE # # Redistribution and use in source and binary forms, with or without # modification, are permitted provided that the following conditions are met: # # 1. Redistributions of source code must retain the above copyright notice, # this list of conditions and the following disclaimer. # # 2. Redistributions in binary form must reproduce the above copyright # notice, this list of conditions and the following disclaimer in the # documentation and/or other materials provided with the distribution. # # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE # AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING # FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER # DEALINGS IN THE SOFTWARE. --> # syntiant-uilib This package contains the Syntiant NDP10x Micro Interface Library (uILib). The uILib is governed by a dual copyright license affixed to each of the source files and in the prefix comment of this file. The version number of the uILib is stored in the `syntiant_ilib/syntiant_ndp_ilib_version.h` file and is also compiled into the library object code itself to be retrieved through the defined-interface for the library. The uILib uses 'uILib log files' generated from the full Syntiant NDP uILib to configure the NDP10x device with firmware. The full Syntiant NDP uILib and the capacity to generate new uILib firmware log files is not included in the uILib distribution. However, several example log files are included to permit exercise of NDP10x devices with the uILib. ## The uILib The library itself is in a single source file `syntiant_ndp10x_micro.c` with the interface header file in `syntiant_ilib/syntiant_ndp10x_micro.h`. The supplied `Makefile` can build a statically-linked (`.a`) or dynamically-linked (`.so`) library object for the uILib. Alternatively, the `syntiant_ndp10x_micro.c` C file or the generated `syntiant_ndp10x_micro.o` object file can simply be integrated into the client system's build process. ## The `ndp10x_micro_app` Sample Program The package also contains a sample program `ndp10x_micro_app.c` intended to run on a Syntiant NDP9101B0-EVL evaluation system. It can be used as a reference for other clients. The `uilib-logs` directory contains 3 uILib firmware log files to allow exercise of an NDP10x device from the `ndp10x_micro_app`: * alexa_spi.bin -- initializes the NDP10x to recognize the trigger word 'Alexa' with PCM audio input over the device SPI interface * spi_to_pdm0.bin -- switches the audio input from the SPI interface to the pdm0 microphone * pdm0_to_spi.bin -- switches the audio input from the pdm0 microphone to the SPI interface The ILib CLI script used to create these firmware log files is also in the `uilib-logs` directory named `ndp10x_micro_app_logs.txt` The `ndp10x_micro_app` sample can be tested on a single channel, 16-bit, 16K samples/second PCM audio input file to show recognition on the NDP device: ``` $ make ndp10x_micro_app . . . $ ./ndp10x_micro_app -l uilib-logs/alexa_spi.bin -P alexa.raw Loading log from uilib-logs/alexa_spi.bin butest passed Polling for keyword indefinitely 2021-08-26 14:53:13 match -> alexa $ ``` This will watch for Alexa from the pdm0 microphone for 30 seconds recording the PCM audio to `alexa_watch30.raw` and create a WAV format file `alexa_watch30.wav` using the `sox` command: ``` $ ndp10x_micro_app -l alexa_spi.bin,spi_to_pdm0.bin -p alexa_watch30.raw -D 30 Loading log from alexa_spi.bin Loading log from spi_to_pdm0.bin butest passed Watching for keyword for the next 30 seconds 2021-08-27 09:38:41 match -> alexa 2021-08-27 09:38:45 match -> alexa 2021-08-27 09:38:48 match -> alexa $ sox -r 16k -b 16 -e signed-integer -c 1 alexa_watch30.raw alexa_watch30.wav ```