It makes sense. We use the DP83848 in full duplex mode on several products (thankfully) with no problems.
Out of curiosity what are you working on? (if you are able to share) Regards, -Jason White -----Original Message----- From: lwip-users <[email protected]> On Behalf Of stevestrong Sent: Friday, January 4, 2019 3:15 PM To: [email protected] Subject: Re: [lwip-users] Randomly delayed frame (STM32070 package including LwIP v1.4.1) Jason, thanks for your comment. I saw that no Rx packets were ever lost, no Rx/TX buffer over- or under-flow ever occurred. That finally made me think on DMA and PHY. I realized that currently my PHY works in 100Mbp half-duplex mode, and that could eventually be a problem, when many packets arrive and the PHY tries to send some data in the same time (although the PHY should probably manage this). Then I found on Internet a site which offers a solution for DP83848, a patch for MBED ETH lib, to work in full-duplex mode. I implemented it, and ... voila: no more lost packets in 100 tries! No more delayed packets. Success! So I can conclude that the issue was most probably due to the heavy traffic when PHY is working in half-duplex mode. Does this make sense? Anyway, thank you all for the invested time and effort, I really appreciate it. Steve _______________________________________________ lwip-users mailing list [email protected] https://lists.nongnu.org/mailman/listinfo/lwip-users
