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Automotive Ethernet(NXP S32K344) Demonstration for networking (LwIP) and security(MbedTLS) application’s
Solution Overview
- This demonstration showcases Automotive Ethernet communication with security features, using:
S32K344 EVB: The main microcontroller board, responsible for networking and secure communication.
Media Converter: Converts 100BASE-T1 Automotive Ethernet to RJ45 Ethernet, allowing monitoring via PC.
LwIP: A lightweight TCP/IP stack for handling network communication.
MbedTLS: Provides encryption and security features for secure data transfer.
- The S32K344 EVB operates as the Automotive Ethernet node, transmitting and receiving packets over a 100BASE-T1 interface. A media converter translates these signals into a standard Ethernet format (RJ45), enabling real-time monitoring and debugging using a PC and tools like Wireshark or CMD Terminal.
Hardware Features
- NXP S32K344 EVB
- The S32K344 is a powerful automotive-grade microcontroller designed for real-time applications, functional safety, and secure communication. Key features include:
Dual Arm® Cortex®-M7 cores (up to 160 MHz).
Built-in 100BASE-T1 Ethernet MAC for Automotive Ethernet.
Hardware Security Module (HSM) for secure data communication.
Multiple automotive interfaces (CAN, LIN, FlexRay).
ASIL B safety compliance for automotive applications.
2. Media Converter (100BASE-T1 to RJ45 Ethernet)
- Since Automotive Ethernet (100BASE-T1) is not directly compatible with standard Ethernet, a media converter is used to:
Convert differential Automotive Ethernet signals to standard RJ45 Ethernet.
Enable monitoring of network packets via a PC.
Allow analysis of network traffic using debugging tools.
Software Features
1. LwIP for Networking
-> LwIP (Lightweight IP) is an open-source, lightweight TCP/IP stack designed for embedded systems. In this setup, LwIP is responsible for:
Managing TCP/UDP communication over Automotive Ethernet.
Supporting IPv4/IPv6 networking.
Providing a low-memory footprint, making it ideal for automotive applications.
2. MbedTLS for Security
-> MbedTLS is a cryptographic library that enables secure data transmission. This demonstration leverages MbedTLS for:
TLS/SSL encryption to protect data exchange.
Secure cryptographic algorithms (AES, SHA, RSA, ECC, etc.).
Embedded-friendly implementation, ensuring optimized performance for automotive environments.
-> By integrating MbedTLS, encrypted communication is established over Automotive Ethernet, ensuring data confidentiality, integrity, and authentication in the vehicle network.
