W dniu 09.12.2014 o 04:47, ivo welch pisze:
dear usb experts---per request in the readme file, I am asking the question here. I am trying to get a ptp-gadget device-side implementation of the Picture Transfer Protocol to work on a beaglebone black (AM335x), running debian 7.7. the hosts to use my beaglebone-black device will only be desktop linux computers, so I won't have to worry about obsolete windows bugs. my USB mass storage and USB networking are running on the same gadget USB client port, so I know I have connection and no power issues. There is already a "simple" ptp implementation from denx that does what I need. I want my device to listen (and/or take over) my USB port, answer connections, allow file transfers, and allow disconnections. that's it. (If there is a more solid standard implementation, please let me know. I only need the minimum ptp functions, but I would like them to be as fast and robust as possible.) after downloading the ptp-gadget git, an autoconf complains that AM_MAINTAINER_MODE, AC_PROG_LIBTOOL and AM_INIT_AUTOMAKE are undefined. probably not surprisingly, the resulting "./configure" script then does not work, complaining that it cannot find install-sh, install.sh, or shtool. this couldn't stop me. ;-). ptp.c is just one file, I just created my own Makefile. I had to -I/usr/include/grlib-2.0 and -I/usr/lib/arm-linux-gnueabihf/glib-2.0/include in the first stage and -lglib-2.0 in the second stage. the source seems fairly clean, except for two warnings that could lead to a segfault, based on bad formats %llx on long unsigned int's (instead of long long unsigned int). starting the program, either with "ptp" or with "ptp -v" or with "ptp -v /var/cache/ptp/" (which I created and made user rwx, as well as its thumb directory below it), tells me that I am running Linux PTP Gadget v1.1 (good) and then that it can't chdir to /dev/ptp (no such file or directory). this confuses me. what is supposed to have created /dev/ptp? I am
Not "what" but "who" in this case: yourself? I don't know if Michael's implementation is "by denx". You can have a look at these implementations: http://www.spinics.net/lists/linux-usb/msg41962.html http://www.spinics.net/lists/linux-usb/msg87093.html They use FunctionFS. AP -- 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
