embassy/embassy-net-adin1110/README.md

SPE ADIN1110 embassy-net integration

embassy-net integration for the Analog ADIN1110 SPI SPE ethernet chips.

What is SPE or Single Pair Ethernet / 10 BASE-T1L

SPE is Single Pair Ethernet, what the names implies, it uses a single twisted/differancial pair (only 2 wires) to transmit ethernet packet in full-duplex. SPE is still ethernet, only the phissical layer is different.

SPE also supports PoDL(Power over Data Line), power delivery from 0.5 up to 50 Watts, similair to PoE, but additional hardware and handshake protocol is needed.

SPE has many link speeds but only 10 BASE-T1L is able to reach cable length up to 1000 meters in 2.4 Vpp transmit amplitude. Currently in 2023, none of the standards are compatiable with eachother. So 10 BASE-T1L don't work with a 10 BASE-T1S or 100 BASE-T1.

In the industry SPE is also called APL(Advanced Physical Layer), it is based on the 10 BASE-T1L standard.

APL can be use in intrinsic safety applications/explosion hazardous areas which has it's own name and standard 2-WISE(2-wire intrinsically safe ethernet) IEC TS 60079-47:2021.

10 BASE-T1L and ADIN1110 are designed to support intrinsic safety applications. The power supply energy is fixed and PDoL is not supported.

Supported SPI modes

ADIN1110 supports two SPI modes. Generic and OPEN Alliance 10BASE-T1x MAC-PHY serial interface

Both modes support with and without additional CRC. Currently only Generic SPI with or without CRC is supported.

NOTE: SPI Mode is selected by the hardware pins SPI_CFG0 and SPI_CFG1. Software can't detect nor change the mode.

Hardware

• Testen on Analog Devices EVAL-ADIN1110EBZ with a STM32L4S5QII3P, see spe_adin1110_http_server example.
• SparkFun MicroMod Single Pair Ethernet Function Board or SparkFun MicroMod Single Pair Ethernet Kit, the kit supports multiple microcontrollers, please check if get the right microcontroller that is supported by Embassy!

Other SPE chips

• Analog ADIN2111 2 Port SPI version. Can work with this driver.
• Analog ADIN1100 RGMII version.

Testing

ADIN1110 library can tested on the host with a mock SPI driver

$ cargo test --target x86_64-unknown-linux-gnu

License

This work is licensed under either of

• Apache License, Version 2.0 (LICENSE-APACHE or http://www.apache.org/licenses/LICENSE-2.0)
• MIT license (LICENSE-MIT or http://opensource.org/licenses/MIT)

at your option.