Nice to meet you, Robert ! Could you teach me how to use your use-serial gadget ?（where to put it） I am a rookie... and I read your tutorial on eewiki for usb gadget, it says "Provides http access to beaglebone black over usb." I thought I didn't need http access, so I didn't handle it before.
Thanks. RobertCNelson於 2014年7月10日星期四UTC+8下午9時49分07秒寫道： > > On Thu, Jul 10, 2014 at 8:44 AM, <[email protected] <javascript:>> > wrote: > > Hi, I always used beaglebone white before, and I bought a new BBB one > week > > ago. > > I followed steps on > https://eewiki.net/display/linuxonarm/BeagleBone+Black > > to start with my BBB (so does Beaglebone white), > > However, my computer cannot detect ttyUSB0 through USB socket, but LEDs > on > > BBB can blink. It seems microSD works. > > I followed the steps on eewiki except "usb gadget", "HDMI", "eMMC", and > > "SGX" parts. > > > > I also followed steps for beaglebone white on eewiki and that works. > > (Debian, v3.8, my Ubuntu can detect ttyUSB0 correctly, so I guess that > is > > not problem of file system or kernel or my host PC.) > > > > I don't know what happened to my beaglebone black, I guess that the > problem > > comes from inittab or uEnv.txt, but I have no idea how to deal with it. > (my > > BBB is Rev.C). > > > > If I eject my microSD form BBB, my host PC can detect ttyACM0 (that is a > > system on eMMC), but I have to use a recompiled kernel rather than > Debian on > > eMMC. > > Your getting tricked by a little software trickery. On the original > BeagleBone, there was an ftdi based usb-serial chip connected to the > usb slave port to give your pc a raw "/dev/ttyUSB0" device. On the > BeagleBone Black this was removed to save $'s.. > > However, there is a usb-serial gadget, so we get the kernel to create > a usb-serial device (/dev/ttyACM0) in the default image. It's done > here: > > > https://github.com/RobertCNelson/boot-scripts/blob/master/boot/am335x_evm.sh#L76 > > > That "usb gadget" section on my eewiki.net page would have enabled > that usb-serial gadget too.. > > Regards, > > -- > Robert Nelson > http://www.rcn-ee.com/ > -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
