Bryan O'Donoghue wrote:
I've actually transferred u-boot.bin over such a link via USB as part of my testing for usbdcore_mpc8xx, so if the transfer of files is what you are after perhaps just implementing usbdcore_au1100 yourself and using the higher layer usbtty.c would suffice, for your purposes.
Just reading what I said there, I'll expand a little bit.
Since you want to TFTP over the USB, from your point of view, there is no reason not to use CDC_ACM/g_serial and just do a kermit binary transfer and save yourself the effort of doing Ethernet over the USB.
All you'd really have to do is implement usbdcore_au1100 and just do a straight forward kermit binary transfer .. with the 8xx and both CDC_ACM and g_serial, it works well enough for me.
Still if you are going to do some of the ethernet side ... it would be a good excuse for me, to stay out of the pub !
Bryan