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Overview

Component Diagram

• Qt App: Qt-based application with GUI to control CAN devices easily.
• QtWiznetCanBus: A plug-in which use in Qt-based applications.
• W5100S: The main character of this project. For Ethernet.
• Gateway: Firmware running on WIZnet W5100S-Pico-EVB board to handle Ethernet packets, CAN packets and etc.
• User Interface: Hardware interfaces to use firmware on the board easily.

Hardware

• Link for hardware files

We determined the necessary hardware configuration from the diagram above, and designed and built a PCB/case for a more compact design and configuration.

PCB 3D model

Case 3D model

Software

• GitHub link for Firmware
• GitHub link for Qt Plug-ins

The software was used as a combination of WIZnet ioLibrary + pico + CMake to minimize platform dependence.

Cores

Since the PICO has dual core, roles of these cores are separated as shown below for smooth packet processing.

Shared Memory

We implemented queue buffers in shared memory between two cores to allow each manager (CAN, Ethernet) to operate non-blocking.

Event-Based Socket

In the case of Ethernet Socket, it was created based on Event, making it possible to operate differently depending on the OnWritable() and OnReadable() implementations.

However, due to the nature of the project's configuration, it is made to create only a single socket, so if you want to create multiple sockets, you need to modify the object more extensively.

QtCanBus Plug-in (Only UDP)

We referred to the Cannelloni Can Bus plug-in project, which used the Cannelloni protocol, and created a more general plug-in that could be used without Cannelloni.

Results

Development Notes (Korean)

• [WIZnet CAN] 프로젝트 시작 이야기
• [WIZnet CAN] W5100S-EVB-Pico OLED/DHCP 시험
• [WIZnet CAN] QtCanBus 플러그인 만들기
• [WIZnet CAN] 프로토타입 제작
• [WIZnet CAN] 통신 구현/PCB/케이스 디자인
• [WIZnet CAN] PCB 제작 및 조립
• [WIZnet CAN] 케이스 조립
• [WIZnet CAN] 펌웨어 빌드 및 다운로드 하기
• [WIZnet CAN] Qt 플러그인 빌드 및 실행
• [WIZnet CAN] CANdevStudio 빌드 및 실행

Step by Step Guide

Step 0. Get your parts

Step 1. Assembly parts

Pin Map

(method 1) Using Breadboard

(method 2) Circuit board

(method 2) PCB - more expensive but compact

• Link for schematics & gerber files

Step 2. (Optional) Housing

• Case modeling file link

Step 3. Build & Download Firmware (CMake based Project)

Installation

• Install VS Code
• Install git
• Install cmake
• Install python to download firmware
• Install ARM GCC compiler
• Install windows build tools (for only Windows)
• Install MinGW GCC (for only Windows)

Set environment

• VS Code path in your workspace or entire system (official manual)

- For ARM gcc compiler, (only Windows) windows build tools, MinGW GCC

# for linux -> env.linux
# for macOS -> env.osx
"terminal.integrated.env.windows": {
        "PATH": "${env:PATH};D:/tools/build_tools/xpack-windows-build-tools-4.2.1-2/bin;C:/fw/tools/xpack-arm-none-eabi-gcc-10.2.1-1.1/bin;D:/tools/mingw32/bin",
},

Clone code from repository

cd
git clone git@github.com:RRTstar/wiznet_can_gateway.git
cd wiznet_can_gateway
git submodule update --init
cd external\\pico-sdk
git submodule update --init

Build

cd wiznet_can_gateway
cmake -S . -B build -G "MinGW Makefiles" -DPICO_BOARD=pico
cmake --build build -j4

Download (Just Drag & Drop)

Step 4. Build Qt GUI Plug-in

Install Qt 5.15.2

• (Only for windows) CHECK MinGW 8.1.0 64bit for additional installation

Clone code

git clone git@github.com:RRTstar/QtWiznetCanBus.git

Open Project & Build

• Execute Qt Creator
• Select [File] → [Open File or Project] on top menu bar

• Select & Open [CMakeLists.txt] in the folder cloned above.

• Configure Project (depend on your environment)

- MinGW is for just only Windows

- Opened! Yeeeeeah!!

• Build

Crtl + B  # shortcut

Copy dll file to Qt plugins folder

Test Plug-in

• Open CAN Bus example (default by Qt)

• Build & Run

Crtl + B  # For build
Crtl + R  # For run

- Select wiznet_can

- Enter your devices IP Address:Port (Check your OLED on your device)

Step 5. Build CANdevStudio

Clone code

git clone --recursive git@github.com:GENIVI/CANdevStudio.git

Open Project & Build & Run

• Execute Qt Creator
• Select [File] → [Open File or Project] on top menu bar
• Select & Open [CMakeLists.txt] in the folder cloned above.
• Build & Run

Crtl + B  # For build
Crtl + R  # For run

• Select [New Project...]

• Enter your devices IP Address:Port (Check your OLED on your device)

• Add & connect [CanRawVeiw] component to view CAN messages received.

• Check operation status