Texas Instruments Finland Oy, Porkkalankatu 22, 00180 Helsinki. Y-tunnus/Business ID: 0615521-4. Kotipaikka/Domicile: Helsinki On 16/09/17 19:36, g4@xxxxxxxxxxx wrote: > Greetings, > > I'm trying to find the simplest way to develop a bulk mode gadget that > exposes a standard userland IO interface. I've not been able to find > anything suitable but if such a beast does exist please do point me in the > right direction. Failing that please read on. You should use the serial (tty) interface for this (see f_serial.c / serial.c) > > The appliance collects data via video and other sensors. There is an > intermediate userland processing application that sources from video (V4L2), > SPI, etc. and would write its output to the host via USB. > > V4L2 on the target H3 SoC is only (currently) supported with a 3.4.X kernel. > Thus newer gadget FS options marked as experimental. This may be a > significant constraint, I am not yet sure. > > This is an embedded appliance and g_zero does work. Thus I am minded to > extend g_zero, adding fileops etc. so it appears as a standard character > mode driver in /dev. Read() and write() would simply be hooked in to the > source_sink_complete() handler. Does this sense? No. g_zero is meant only for testing purposes. > > Any comments/thought much appreciated. > > TAIA > > Jerry. > > -- > To unsubscribe from this list: send the line "unsubscribe linux-usb" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html > -- cheers, -roger -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
