Wiznet makers

github link : https://github.com/aimee0000/W55RP20_CAN_to_ETH/tree/main

RP2040 PIO CAN code link : https://github.com/KevinOConnor/can2040

CAN protocol?

1.Overview

The Controller Area Network (CAN) is a serial communication protocol used primarily for communication between microcontrollers and devices within a vehicle. It was developed for real-time data exchange and provides high reliability with robust error detection.

2.Key Features

• Multi-master, message-based communication: Priority-based message transmission between nodes
• High-speed data transfer: Up to 1Mbps (CAN FD supports up to 5–8Mbps)
• Strong error detection: Ensures reliability with CRC, ACK, and error frames
• Cost-effective: Simple 2-wire bus (CAN_H, CAN_L) for easy maintenance

3.Message Frame

• SOF (Start of Frame): Indicates the beginning of a frame
• Identifier (ID): Unique identifier that determines message priority (11-bit or 29-bit)
• Control Field: Contains data length information (DLC)
• Data Field: Actual transmitted data (0–8 bytes, up to 64 bytes in CAN FD)
• CRC (Cyclic Redundancy Check): Checksum for error detection
• ACK (Acknowledge): Indicates successful reception by other nodes
• EOF (End of Frame): Marks the end of the frame

Where CAN to Ethernet converter need?

1.PC to CAN Communication
PCs and servers typically lack CAN interfaces, so a converter bridges Ethernet and CAN.

2.Remote Monitoring & Control
Ethernet enables long-distance access to CAN networks for diagnostics or control.

3.Integration of Mixed Networks
In smart factories, devices with Ethernet and CAN need to communicate seamlessly.

4.Development & Testing Environments
Developers can simulate or test CAN communication over Ethernet when native CAN is unavailable.

How to test CAN to Ethernet?

Please refer to ReadMe on this page.

https://github.com/aimee0000/W55RP20_CAN_to_ETH/tree/main