Software JTAG Probe for Xilinz Zynq SoC

[Flemming_Christensen]

We are currently investigating how to deploy and debug code on the Sundance board.
We will use JTAG to do so.
What JTAG probe do you advise to use?
We're looking for something that is compatible with OpenOCD (http://openocd.org/), at least in the first stages of development.

Best regards,


Antonio Paolillo
HIPPEROS S.A. Senior Developer
antonio.paolillo@hipperos.com

[Flemming_Christensen]

- and I noticed that a Xilinx Zynq was NOT on the supported devices, so not sure that OpenOCD is the route forward. Sundance mainly uses the JTAG from debug of the hardware/fabric part of the Zynq.

Anybody got anything to add?


Flemming

[Antonio.Paolillo]

It looks like Zynq-7000 is supported by OpenOCD, as a simple search in the binary folder of openocd shows:

Code: Select all

antonio@AntoUlbLab:/opt/openocd-0.10.0_20160324_b6c4a5db3e/share$ grep -rin "zynq"
openocd/scripts/board/adapteva_parallella1.cfg:7:source [find target/zynq_7000.cfg]
openocd/scripts/board/digilent_zedboard.cfg:2:# Digilent Zedboard Rev.C, Rev.D with Xilinx Zynq chip
openocd/scripts/board/digilent_zedboard.cfg:11:source [find target/zynq_7000.cfg]
openocd/scripts/target/zynq_7000.cfg:2:# Xilinx Zynq-7000 All Programmable SoC
openocd/scripts/target/zynq_7000.cfg:4:# http://www.xilinx.com/products/silicon-devices/soc/zynq-7000/index.htm
openocd/scripts/target/zynq_7000.cfg:7:set _CHIPNAME zynq
openocd/scripts/target/zynq_7000.cfg:10:jtag newtap zynq_pl bs -irlen 6 -ircapture 0x1 -irmask 0x03 \

Also, Google gives encouraging results too:
https://devel.rtems.org/wiki/Debugging/ ... ilinx_Zynq
https://sourceforge.net/p/openocd/mailm ... /32130201/
https://github.com/arduino/OpenOCD/blob ... q_7000.cfg
https://github.com/arduino/OpenOCD/blob ... q_7000.cfg

[Timoteo]

Hi,

What we've always used is Uart. Use Uart0 in MIO pins 14-15, you can "activate" them in the Zynq processor system IP block in IP Integrator, in "MIO Configuration"

I will have a look for JTAG.
Regards,

Timoteo

[Timoteo]

Hi again,

Maybe you find this useful:

https://forums.xilinx.com/t5/Zynq-All-Programmable-SoC/JTAG-for-ZYNQ/td-p/399745

As one of the users in that thread says, read the chapter 27 of the Zynq document

http://www.xilinx.com/support/documentation/user_guides/ug585-Zynq-7000-TRM.pdf

I hope that's helpful.

As Ive never used JTAG to debug, I don't know. When I tried to take advantage in SDK from the Xilinx code examples, every time I wanted to import new application projects, a UART unit is needed for it as far as I remember, at least to create a "Hello World" project.

Regards,

Timoteo

[Antonio.Paolillo]

Good news!
We managed to debug the EMC2/Trenz board with the lauterbach tools
It was not working previously because of the space between the trenz and the sundance board, but now that we properly connected them together, the debugging tool was working directly
(Therefore with this space the JTAG pins weren't properly connected before)

We are now pursuing investigation to make OpenOCD works too, to support more affordable tools.

Regards,
Antonio