Thanks a lot.
Meanwhile I am able to get always a link to Rtl8211. But very often sending of first message (dhcp_discover) after reset is not really working.
The function runs well, but no output of data (monitoring network with Wireshark).
Seems to be a timing or initializing issue of Rtl8211 or GETH/DMA.
If I try much times, it works. Then everything works fine for hours (without resetting the board).
In case of failing, DMA is copying the first message in TX Buffer and starts the transfer but nothing happens, but no data comes out.
So the SW runs in timeout.
Meanwhile I am able to get always a link to Rtl8211. But very often sending of first message (dhcp_discover) after reset is not really working.
The function runs well, but no output of data (monitoring network with Wireshark).
Seems to be a timing or initializing issue of Rtl8211 or GETH/DMA.
If I try much times, it works. Then everything works fine for hours (without resetting the board).
In case of failing, DMA is copying the first message in TX Buffer and starts the transfer but nothing happens, but no data comes out.
So the SW runs in timeout.