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 10 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
Cancel
Vote Up 0 Vote Down

Sign in to reply

Verify Answer

Cancel
0 Former Member over 10 years ago in reply to Former Member

Both cables are connected
Cancel
Vote Up 0 Vote Down

Sign in to reply

Verify Answer

Cancel
0 Former Member over 10 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
Cancel
Vote Up 0 Vote Down

Sign in to reply

Verify Answer

Cancel
0 Former Member over 10 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
Cancel
Vote Up 0 Vote Down

Sign in to reply

Verify Answer

Cancel