Ethernet Transceiver Custom Implementation

MateoSegura413 — Fri, 15 Jul 2022 08:11:38 GMT

Context:

Platform: S32K3**

We are implementing our own EthTrcv MCAL driver for an Ethernet Transceiver. We are also using the MCAL Hardware Drivers. (SW32K344_RTD_4_4_2_0_0_D2203)

However, there’s also a stub file for EthTrcv, under the MCAL folder of the SDK path shown below:

This file only has the 2 following methods in it, and they’re undefined. I’m guessing these are the Read/Write methods for the transceiver using the MDIO bus...

Questions:

How should this stub file be implemented?

If I’ve understood things correctly, the GMAC_IP driver API must be used here to call the correct MDIO_Write/MDIO_Read methods. Is this a correct statement?
How can I Implement this in my own source code and not in the SDK folder under the S32DS location?
Are these methods used internally by the MCAL Eth Driver?

Thanks in advance for your time and help!

Re: Ethernet Transceiver Custom Implementation

namnguyenviet — Tue, 19 Jul 2022 04:45:45 GMT

Hello @MateoSegura413,

In fact, Eth_WriteMii/Eth_ReadMii are two functions which writes/reads a transceiver (physical layer driver) register, and EthTrcv_WriteMiiIndication/EthTrcv_ReadMiiIndication are two callback functions which are called by Eth_WriteMii/Eth_ReadMii to notify to EthTrcv the status of MII write/read. To implement these stubs, you can contact your local FAE to get the Eth transceiver driver package.

Regarding your questions:

1. Like below, EthTrcv_WriteMiiIndication/EthTrcv_ReadMiiIndication are just two callback functions to notify to EthTrcv the status of MII write/read, and Eth_WriteMii/Eth_ReadMii calls the correct MDIO_Write/MDIO_Read methods (throug Gmac_Ip).

2. and 3. These EthTrcv functions are stubs, so you can do whatever with these functions. Also, you can refer to the Eth Transceiver package provides by NXP. As far as I concern, you can even ignore the EthTrcv, since the Eth/Gmac_IP provides enough methods to writes/reads a transceiver (physical layer driver) register.

Hope it helps.

Best Regards,

Nam

topic Ethernet Transceiver Custom Implementation in S32K

Ethernet Transceiver Custom Implementation

Re: Ethernet Transceiver Custom Implementation