wifi芯片乐鑫ESP32-LyraT-Mini V1.2开发板入门指南

wifi芯片乐鑫ESP32-LyraT-Mini V1.2开发板入门指南

This guide provides users with functional descriptions, configuration options for ESP32-LyraT-Mini V1.2 audio development board, as well as how to get started with the ESP32-LyraT board.
本文档为用户提供 wifi芯片乐鑫ESP32-LyraT-Mini v1.2 音频开发板的功能描述、配置选项以及如何快速入门使用 ESP32-LyraT 开发板。

The ESP32-LyraT is a hardware platform designed for the dual-core ESP32 audio applications, e.g., Wi-Fi or BT audio speakers, speech-based remote controllers, connected smart-home appliances with one or more audio functionality, etc.
ESP32-LyraT 是一个基于双核 ESP32 用于开发音频应用程序的硬件平台，例如 Wi-Fi音箱、蓝牙音箱、语音遥控器以及有一个或多个音频功能的智能家居应用等。

The ESP32-LyraT-Mini is a mono audio board. If you are looking for a stereo audio board, check ESP32-LyraT V4.3 Getting Started Guide.
ESP32-LyraT-Mini 是单声道音频开发板，如需立体声音频开发板，请前往 ESP32-LyraT V4.3 入门指南。

What You Need
ESP32-LyraT-Mini V1.2 board
Speaker or headphones with a 3.5 mm jack. If you use a speaker, it is recommended to choose one no more than 3 watts, and JST PH 2.0 2-Pin plugs are needed. In case you do not have this type of plug it is also fine to use Dupont female jumper wires during development.
Two Micro-USB 2.0 cables, Type A to Micro B
PC loaded with Windows, Linux or Mac OS
准备工作
wifi芯片乐鑫ESP32-LyraT-Mini V1.2 开发板
扬声器或 3.5 mm 的耳机（若使用扬声器，建议功率不超过 3 瓦特，另外需要接口为 JST PH 2.0 毫米 2 针的插头，若没有此插头，开发过程中可替换为杜邦母跳线）
两个 Micro-USB 2.0 数据线（Type A 到 Micro B）
PC（Windows、Linux 或 Mac OS）

Optional components
可选组件

Micro SD-card
Li-ion Battery
Micro SD 卡
锂电池

Overview
The ESP32-LyraT-Mini V1.2 is an audio development board produced by Espressif built around ESP32. It is intended for audio applications, by providing hardware for audio processing and additional RAM on top of what is already on-board of the ESP32 chip. The specific hardware includes:

ESP32-WROVER-B module
Audio codec chip
ADC chip
Microphone on board
Audio output
1 x 3-watt speaker output
MicroSD card slot (1 line)
Eight keys
Two system LEDs
JTAG and UART test points
Integrated USB-UART Bridge Chip
Li-ion Battery-Charge Management
概述
ESP32-LyraT-Mini 1.2 是基于wifi芯片乐鑫 ESP32 专为音频应用市场打造的音频开发板。其主要包括了音频编解码芯片，外置扩展 RAM 和双核 ESP32 芯片。 硬件具体包括：
ESP32-WROVER-B 模组
音频编解码芯片
ADC 芯片
麦克风
音频输出
1 x 3 瓦特扬声器 输出
MicroSD 卡 槽（一线模式）
八个键
两个系统指示灯
JTAG 和 UART 测试点
集成 USB-UART 桥接芯片
锂 电池充电管理

The block diagram below presents main components of the ESP32-LyraT-Mini and interconnections between components.
下图所示的是 ESP32-LyraT-Mini 的主要组件以及组件之间的连接方式。

ESP32-LyraT-Mini 框图

Components
组件
The following list and figure describe key components, interfaces and controls of the ESP32-LyraT-Mini used in this guide. For detailed technical documentation of this board, please refer to ESP32-LyraT-Mini V1.2 Hardware Reference and ESP32-LyraT-Mini V1.2 schematic (PDF). The list below provides description starting from the picture’s top right corner and going clockwise.
本指南涉及到的 wifi芯片乐鑫ESP32-LyraT-Mini 开发板的主要组件、接口及控制方式见下。详细技术文档请参阅 ESP32-LyraT-Mini V1.2 Hardware Reference 和 ESP32-LyraT-Mini V1.2 原理图 (PDF)。ESP32-LyraT-Mini 开发板各组件的详细描述见下表（从右上角起顺时针顺序）。

Audio Codec Chip
The audio codec chip, ES8311, is a low power mono audio codec. It consists of 1-channel ADC, 1-channel DAC, low noise pre-amplifier, headphone driver, digital sound effects, analog mixing and gain functions. It is interfaced with ESP32-WROVER-B Module over I2S and I2C buses to provide audio processing in hardware independently from the audio application.
音频编解码芯片
音频编解码芯片 ES8311 是一款低功耗单声道音频编解码器。它由单通道 ADC、单通道 DAC、低噪声前置放大器、耳机驱动程序、数字音效处理器、模拟混音器和增益函数组成。该芯片通过 I2S 和 I2C 总线与 ESP32-WROVER-B 模组 连接提供硬件音频处理功能。

Audio Output
Output socket to connect headphones with a 3.5 mm stereo jack. (Please note that the board outputs a mono signal)
音频输出
音频输出插槽，可连接 3.5 mm 立体声耳机。（请注意，此开发板输出单声道信号）

Speaker Output
Output socket to connect a speaker. The 4-ohm and 3-watt speaker is recommended. The pins have a 2.00 mm / 0.08” pitch.
扬声器输出
音频输出插槽，采用 2.00 mm / 0.08” 排针间距，建议连接 4 欧姆 3 瓦特扬声器。

ESP32 LyraT-Mini V1.2 开发板布局概览

USB-UART Port
Functions as the communication interface between a PC and the ESP32.
USB-UART 接口
作为 PC 与 ESP32 之间的通信接口。

USB Power Port
Provides the power supply for the board.
USB 充电端口
可用作开发板的供电电源。

Standby / Charging LEDs
The Standby green LED indicates that power has been applied to the USB Power Port. The Charging red LED indicates that a battery connected to the Battery Socket is being charged.
待机/充电指示灯
绿色 待机 指示灯亮起表示电源已接入 USB 充电端口。红色 充电 指示灯亮起表示 电池座 上的电池正在充电。

Power On Switch
Power on/off knob: toggling it to the top powers the board on; toggling it to the down powers the board off.
电源开关
电源开/关按钮：向上拨动按钮则开发板电源开启；向下拨动则电源关闭。

Power On LED
Red LED indicating that Power On Switch is turned on.
电源指示灯
红色指示灯亮起表示 电源开关 已开启。

ESP32-WROVER-B Module
The ESP32-WROVER-B module contains ESP32 chip to provide Wi-Fi / BT connectivity and data processing power as well as integrates 32 Mbit SPI flash and 64 Mbit PSRAM for flexible data storage.
ESP32-WROVER-B 模组
ESP32-WROVER-B 模组中包含 ESP32 芯片，可提供 Wi-Fi/蓝牙连接和数字处理能力，同时集成了 32 Mbit SPI flash 与 64 Mbit PSRAM，可实现灵活的数据存储。

Start Application Development
Before powering up the ESP32-LyraT-Mini, please make sure that the board has been received in good condition with no obvious signs of damage.
应用程序开发
ESP32-LyraT-Mini 上电之前，请先确认开发板完好无损。

Initial Setup
Prepare the board for loading of the first sample application:
Connect speaker to the Speaker Output. Connecting headphones to the Audio Output is an option.
Plug in the Micro-USB cables to the PC and to both USB ports of the ESP32-LyraT-Mini.
The Standby LED (green) should turn on. Assuming that a battery is not connected, the Charging LED (red) will blink every couple of seconds.
Toggle top the Power On Switch.
The red Power On LED should turn on.
初始设置
设置开发板，运行一个示例应用程序：
连接扬声器到 扬声器输出。也可选择连接耳机到 音频输出。
使用 Micro-USB 数据线将 ESP32-LyraT-Mini 开发板的 两个 USB 端口 均与 PC 相连。
此时，绿色 待机指示灯 应亮起。假设电池未连接，那么红色 充电指示灯 将每隔几秒闪烁一次。
向上拨动 电源开关。
此时，红色 电源指示灯 应亮起。