Re: [lwip-users] Establishing a link

[Leon Woestenberg]

Hello Robert,

Robert wrote:

> When interfacing to certain Ethernet devices, my board is not be able to 
> establish a link.  If there is a 10baseT hub in circuit, it works 
> every time, but if there is a direction connection between my board and 
> certain devices, the link will not come up, or will only come up if the 
> other device is power cycled.
>
> We came upon a Cirrus Logic app note #AN205 that speaks to clearing bit 9
> in the LineCTL register, but that bit is already cleared in my case.  We
> are guessing that the problem is related to auto negotiation.  Does anyone
> have any ideas or suggestions for solving this problem?
>
>  
I remember we have had the exact same experience, i.e. 100baseT to a 
10baseT cs8900 lwIP
host.  We also had to (re)start the "other" device after the lwIP host 
is alive.

I am not sure if we came up with a fix or other more practical 
workaround, but I will ask
my collegae. Maybe he is reading this as well.

Regards,

Leon.