On Mon, Jan 28, 2019 at 04:54:12PM +0100, nicolas lantz wrote:
Hi,
I am working on a demo using Ethernet Over USB on the nrf52840.
In subsys/usb/class/netusb/
I saw a misalignement probleme between the : .wMaxSegmentSize = sys_cpu_to_le16(1514), declared in function_ecm.c and the : #define NETUSB_MTU 1500 declared in netusb.h
As rx_buf & tx_buf are defined with a NETUSB_MTU size, this cause that the frames over 1500 bytes can not be received and are discarded.
Secondly, as fragmentation is not supported (for UDP and TCP datagram), I suggest to increase the NETUSB_MTU to the maximum of the possible ethernet frame size :1522
These modifications give : in netusb.h : #define NETUSB_MTU 1522 in function_ecm.c : .wMaxSegmentSize = sys_cpu_to_le16(NETUSB_MTU),
Attached a patch.
Could you make a proper commit and send Pull Request on github?
