W5300 칩을 사용하여 네트웍으로 사운드 데이터를 실시간으로 전달해서 스피커로 출력을 하고 IoT 제어를 위한 기능을 포함한 시스템이다.
COMPONENTSHardware components
WIZnet - W5300
x 1
PROJECT DESCRIPTION
Overview
WIZnet's W5300 chip is a hardware TCP/IP chip that supports a 16-bit bus and can transmit and receive data at high speed. Therefore, the WIZ-IOT-SPEAKER project takes full advantage of these features and uses the W5300 chip to transmit audio data as streaming on a PC for playback.
Project Goals
This is what you get at the end of the project so you can at least move on.
A system that uses the W5300 chip to transmit sound data to the network in real time and output it to the speaker.
Design and build boards using the W5300 and MCUs
Write circuit designs, artwork, firmware, and complete PC programs
Requirements
Organize the requirements to achieve the goal and define and schedule detailed tasks based on them.
Utilize the high-speed characteristics of the W5300 chip.
Be able to deliver audio data in real time.
It should be able to output data from the network to the speaker.
It should be possible to check necessary information such as IP using an information display device such as an LCD.
Build own board and share the data.
Audio data can be sent from a PC or to the same board.
The development environment must be multiplatform. (Windows/Mac/Linux)
W5300 Control reads datasheets and uses registers to build libraries by hand.
Considerations
As you progress through the project, feel free to draw out and reflect on things to consider.
I make my own boards and enjoy the process.
Create additional I/O on the board beyond the basic functions so that it can be utilized as a development board.
How do you want to send audio data from the PC?
If you're creating a PC program, should it be a GUI?
Do I need a microphone sensor, and if so, should I mount it on the board?
Can we send video data as well?
Could you send motion data to control a remote robot?
The board consists of two boards, the main board contains the MCU including the W5300 chip and the audio output function, and the extended IO connector implements functions such as LCD and rotary encoder.
Build Board
Main Board
Designing on four levels to reduce board size and increase artwork convenience
Circuit design and artwork
I/O Board
Circuit design and artwork
Assembling the Board
Main Board + I/O Board
Assembling a 3D Cube
Firmware Results
Memory Map
Separate the bootloader and firmware areas and securely update the firmware via external memory.
Apply the LittleFS PySystem to external memory to manage parameter storage.
Communication Packet Structure
When communicating with a PC, communication packets are defined for data exchange, and commands and data are delivered through them.
Bootloader Commands
Audio Streaming Commands
Safe Firmware Update Structure
The firmware update is designed to utilize additional memory to ensure that it can be recovered or not affected if something goes wrong in the middle.
Update Process
Download the firmware from the PC to the external memory.
The bootloader updates the firmware by copying the firmware from the external flash memory to the internal flash memory.
Run the updated firmware.
Firmware Update over UDP
The communication driver structure allows the firmware to be updated equally over UART and UDP.
UDP Update Log
The progress of the update is displayed on the LCD.
Audio Output Structure
Use a double buffering structure and DMA to ensure uninterrupted audio output.
Streaming Audio
Receives audio data blocks from the PC and buffers them before outputting the audio.
Software Results
Downloader Program
A PC program written in C++ that allows firmware updates over UART or UDP and tests audio streaming.
Audio Streaming GUI
It is a GUI program using PySide6 and transmits audio data to the WIZ-IOT-SPEAKER board in real time through socket communication.
Demo Video
Show audio spectrum
Update UDP Firmware
Audio streaming and OSD volume control
Configuring a GIT repository
Firmware
STM32CubeMX Project
Bootloader
Firmware
Hardware
Schematic, Gerber files, BOM
Software
PC Download Program
GUI Program
Youtube videos
Creating an IoT-Speaker #1 - Project Planning is Hard
For the past three months, I've been working on artwork all night, and it was not easy to proceed from project planning to hardware, firmware, and software, but by working together, I was able to implement the interconnected parts faster than I thought, and I think I experienced a lot of things, such as socket communication using Wiznet's W5300.
The project ends here, but we will continue to add features with this hardware. For reference, I think there are many things that can be done, such as updating the firmware with the GUI or interlocking with Home Assistant using MQTT.
Finally, I would like to thank everyone who has been interested in the project and provided feedback.
