W5100 Sn_SR undocumented misfeature / bug - Page 2 — Parallax Forums

W5100 Sn_SR undocumented misfeature / bug

kuisma · 2011-02-11 12:13:03

When sending UDP, it is necessary to make sure the socket is in SOCK_UDP before actually transmitting the data by checking the Sn_SR register. Sometimes after a transmit, it may change from SOCK_UDP (0x22) to the undocumented status 0x01. I guess this occurs during ARP requests, but it is not documented, so any guess is as…

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