STM32F429 MDIO

[volker]

Posted on December 03, 2014 at 09:47

Hi,

we have to manage a CFP Module via MDIO with STM32F429. Unfortunately the module requires MDIO according to 802.3 clause 45. I am right that the 429er supports only the older version (clause 22)?Is there another possibility to avoid writing a bit banging driver?Did a controller of family STM32F4 supports MDIO clause 45?Thanks for help!Volker

[waclawek.jan]

Posted on December 03, 2014 at 10:24

> I am right that the 429er supports only the older version (clause 22)?

Yes, the start and opcode bits appear to be ''hardwired'' to the cl.22 style.

> Is there another possibility to avoid writing a bit banging driver?

Maybe SPI could be abused in some inventive way, but that may turn out to be close to pure bit-banging. > Did a controller of family STM32F4 supports MDIO clause 45? AFAIK, no. JW