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Using Xilinx Tools Forum serial converter disconnected automatically
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Related

serial converter disconnected automatically

Former Member
Former Member over 9 years ago

Hello everyone,

The serial converter disconnected automatically when I was trying to connect JTag port (J17) of ZedBoard.
I am using Ubuntu 12.04 operating system.
I could find hardware by using command "djtgcfg enum" (Thanks Sven Andersson), as follows:

--> djtgcfg enum
Found 1 device(s)
Device: Zed
    Product Name:   Digilent Zed
    User Name:      Zed
    Serial Number:  21024XXXXXXX



But the dmesg shows:
[24384.116118] usb 3-1: New USB device found, idVendor=0403, idProduct=6014
[24384.116132] usb 3-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[24384.116136] usb 3-1: Product: Digilent USB Device
[24384.116139] usb 3-1: Manufacturer: Digilent
[24384.116141] usb 3-1: SerialNumber: 21024XXXXXXX
[24384.118677] ftdi_sio 3-1:1.0: FTDI USB Serial Device converter detected
[24384.118714] usb 3-1: Detected FT232H
[24384.118717] usb 3-1: Number of endpoints 2
[24384.118719] usb 3-1: Endpoint 1 MaxPacketSize 512
[24384.118721] usb 3-1: Endpoint 2 MaxPacketSize 512
[24384.118723] usb 3-1: Setting MaxPacketSize 512
[24384.119026] usb 3-1: FTDI USB Serial Device converter now attached to ttyUSB0
[24384.130393] ftdi_sio ttyUSB0: FTDI USB Serial Device converter now disconnected from ttyUSB0
[24384.130428] ftdi_sio 3-1:1.0: device disconnected

I have already remove "brltty" from my system, but no help on such problem.

any help????

Thank you.

Regards,
P

P.S. ttyUSB0 works fine if connecting to J14 serial port.

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  • zedhed
    0 zedhed over 9 years ago

    Hi Pengcheng,

    I think that the USB Serial device converter is only one of the two endpoints found on the FTDI device connected to J17.

    Are you able to perform a "djtgcfg init -d Zed" according to Sven's instructions here and see the ZedBoard target on the scan chain?

    http://svenand.blogdrive.com/archive/172.html#.VkTUg7erSM8

    Regards,

    -Kevin

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  • Former Member
    0 Former Member over 9 years ago in reply to zedhed

    Hi K,

    Thank you very much for your comments.
    You r DEFINITELY CORRECT.

    The cable connected with J14 (UART) was not working for some reasons which I am not clear.
    What I have to do is unplug and plug J14 after powering on the board.

    Thank you very much again.

    R,

    P

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