M52233DEMO FULL-DUPLEX DON´T WORK

[ReySinTrono]

Hi Mark,

I don´t get full duplex in M52233DEMO.  What do you think can be the reason?

Thanks.

[mark]

Hi

Full duplex operation can only be achieved between two directly connected devices (as far as I know).

If the board is connected directly to another board or to a PC (using cross-over cable) full duplex should be possible.
If you connect to anything else (switch / hub) then half-duplex is required.

I have to admit to not being an expert concerning the details here but I think that, if you set auto-negotiation and see what it achieved, it will inform what is possible - i.e. it will only set full-duplex if it can work.

Also check the auto-negotiation errata in the M5223X PHY (see note in the tutorial and some other threads here) to ensure that this is not the cause of any difficulties.

Regards

Mark

[ReySinTrono]

Hi Mark,

If I connect a PC to switch, the led full duplex is on. why if i connect a m52233demo to switch and the led full duplex is not on?.

Thanks in advance.

[mcosta]

Hi,

Did you check the "Full Duplex" and "autonegotiate" bug that Mark said?

My board has this bug and I have to disable the autonegotiate.

Regards,
Marcelo Costa