How to debug hikey960 via JTAG?

Products Support HiKey 960
#1

Dear all,

I see some materials about JTAG debug for hikey960:

Solder a JTAG connector to the pcb is easy, I’m wondering what else need to do if I want to debug hikey960 with DS-5?

Or more specifically,
Is JTAG debug still doable and popular?
Must I buy a DSTREAM-ST? Is ULINK OK for 960? Difference between Ulink and Dstream-st?
DSTREAM and ULINK are rare nowadays (if I’m correct…) are they still on sale? Any other hardware debugger which are compatible?

Any ideas should be helpful! Thank you, guys!

#2

This is the first time I remember seeing anyone talk about using JTAG. Most are content debugging over UART.

Good luck!

#3

huh! Thx your reply anyway. UART cannot debug as deep as JTAG, dont you guys think so? :laughing:

#4

JTAG definitely can debug a lot deeper than a UART… but that only matters in circumstances where a developer has to debug a problem and the UART does not see far enough.

If you are working on a problem where JTAG is required then have JTAG debugging can be a huge time saver but unfortunately there’s not a lot of community experience with JTAG on the forum. There is some however:

There has also been code contributed to openocd to enable hikey960 support (together with a clear indication that it works with a BusBlaster v3):
http://openocd.zylin.com/gitweb?p=openocd.git;a=commitdiff;h=e255a7f7bfa2331f346029154c8328324eb2491e

#5

danielt, what would be the prefered toolchain for debugging on Windows? I will need to debug code that runs on a Tensilica HiFi co-processor which is on the hikey960 board. How do I shoot some example code there and possibly debug? It’s going to be very low level, fixed-point code that I will need to debug.

But also I would like to debug Arm A53 cores too.

#6

Thx, the infromation about the plan with busblaster v3c is really helpful!

Will update if something works!

#7

Thank you, guys! Busblaster v3c with OpenOCD can actually work!

This link gives you the description of hikey960 board for OpenOCD

This is the CPLD image for busblaster I use

Btw, OpenOCD for Hikey (not 960!) may also help you understand that!