Multiple JTAG connections

Hi,

I am currently using Ubuntu 12.04.5 and Vivado 14.3 on Virtual box. Both Vivado and the SDK can program successfully to my zed board. However, I have noticed that If I make a serial connection (picocom, minicom, gtkterm) to the zynq device by using the JTAG cable, the SDK can no longer see or identify the zynq device. if I close the serial connection, the SDK can successfully find the devices again.
Furthermore, if I program the device by using SDK and then make the serial connection to listen to the UART output from c routine, the JTAG connection is lost, and I have to restart the board.

By the way, I have tried other versions of Ubuntu and Vivado and I get the same problem

Any help is appreciated.

0 Former Member over 9 years ago

On the ZedBoard there are two micro USB connections:

J17 which is the JTAG/Programming connector.
J14 which is the USB-UART connection.

Typically you connect J14 to your host PC to establish a serial connection to minicom, etc. and for that you need to load the drivers for the Cypress USB to UART device. You make a separate connection from J17 to your host PC to connect the Digilent JTAG interface embedded in the ZedBoard to Vivado/SDK. You will need to load the Digilent drivers for this connection.

So you need both cables connected between the ZedBoard to your host to perform these tasks.

-Gary
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0 Former Member over 9 years ago in reply to Former Member

Both cables are connected
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0 Former Member over 9 years ago

You might want to take a look at Sven Andersson's blog as he uses Ubuntu in a VM as well. This forum post references Sven's blog and issues another forum poster resolved: http://zedboard.org/content/cant-make-jtag-connect-zedboard-ctt-vivado-20142

-Gary
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0 Former Member over 9 years ago

Problem solved. When running on virtualbox, we need Oracle VM VirtualBox Extension Pack and Enable USB 2.0 (EHCI) Controller option checked. Full instructions here http://zedboard.org/content/windows-7-sdk-20142-cable-not-connected-erroruFEFF
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