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 - Does this issue come from the Ftdi driver? - Is it a BBB hardware problem? (The issue is reproduced on all my four BBB) - Where can I send this report to the good guy? Thank you, Sylvain -- 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 beagleboard+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/a53c3db9-d531-491e-8f44-62c7163ba64a%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
