On Mon, Dec 12, 2016 at 12:15 PM, Sylvain <[email protected]> wrote: > Hello, > > I try to plug more than one FTDI Usb Serial Adapter on a BeagleBone Black. > > I tried several adapters and all work fine if plugged directly on the USB > Host port. > > But if I use an USB hub - I tried several - or a specific cape > (http://www.titan.tw/product/USB_2COM_BB.html), the ftdi driver complains: > >> [ 1544.135039] ftdi_sio ttyUSB0: ftdi_set_termios FAILED to set >> databits/stopbits/parity >> [ 1545.143074] ftdi_sio ttyUSB0: ftdi_set_termios urb failed to set >> baudrate >> [ 1550.151247] ftdi_sio ttyUSB0: urb failed to clear flow control > > > > Here comes the different cases: > > BBB Usb Host > USB Cape > Ftdi Usb Serial Adapter 1 > > Ftdi Usb Serial Adapter 2 > > BBB Usb Host > USB Hub > Ftdi Usb Serial Adapter 1 > > Ftdi Usb Serial Adapter 2 > > BBB Usb Host > USB Hub > USB Cape > Ftdi Usb Serial Adapter 1 > > Ftdi Usb Serial Adapter 2 > > --> fails > > > > BBB Usb Host > Ftdi Usb Serial Adapter 1 > BBB Usb Host > USB Cape > > --> works
how are you powering the hub? and BBB? Is it possible that you're running out of supply current? Try a powered hub---does it make a difference? -- 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]. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/CAC%3D1GgFy5_nM_5Z4D9qPEdSq34TMsyCzcDXdUGD6uuu-KXcoFQ%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
