Re: [lwip-users] lwIP Packets are not received

[Jan Menzel]

Hi Arul!
        Enabling d-cache requires code changes wherever other hardware is
accessing ram because the cache might contain data not yet written back
to memory or old data that does not reflect the current memory content.
As most emacs use DMAs to send and receive you have to drain d-cache for
each received packet and flush d-cache for each packet to be
transmitted. You may also search the line archive as this topic was
discussed a few times in the past.

        Best regards
                Jan

On 23.06.2018 13:55, M S ARUL wrote:
> Hello All,
> I`m using sama5d3xek development board. I have integrated lwIP with
> embOS. It was working fine when D-Cache & I-Cache weren`t enabled. But
> no packets are received after enabling the Cache Unit. Also in IAR if I
> select SAMA5D35 as a device in options tab, no bytes are received. I had
> to select the device as None, then only stack was working. Can someone
> help me find the issue? Thanks in Advance.
> 
> Best Regards,
> ARUL PRAKASH M
> 
> 
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