Verdin Mini Dahlia Jtag Debugging with OpenOCD


I would like to debug Verdin on Dahlia with on board FTDI JTAG interface with openOCD. There is no script to support the board OpenOCD v0.11.0-1. Also there is no documentation specific to Verdin on here on Toradex website. Please share if you have.

Thanks in advance.

any comment ?

The openOCD start with following CFG and report as CPU examination failed

The Output

xPack OpenOCD, x86_64 Open On-Chip Debugger 0.11.0-00155-ge392e485e (2021-03-15-16:43)
Licensed under GNU GPL v2
For bug reports, read
Info : Listening on port 6666 for tcl connections
Info : Listening on port 4444 for telnet connections
Info : clock speed 1000 kHz
Info : JTAG tap: imx8mm.cpu tap/device found: 0x5ba00477 (mfg: 0x23b (ARM Ltd), part: 0xba00, ver: 0x5)
Info : DAP transaction stalled (WAIT) - slowing down
Error: imx8mm.a53.0: examination failed

Warn : target imx8mm.a53.0 examination failed
Info : starting gdb server for imx8mm.a53.0 on 3333
Info : Listening on port 3333 for gdb connections
Info : starting gdb server for imx8mm.m4 on 3334
Info : Listening on port 3334 for gdb connections

The Config

# configuration file for Toradex Verdin Mini Dahlia carrier board
# Board includes FTDI-based JTAG adapter

adapter driver ftdi
ftdi_vid_pid 0x0403 0x6011
ftdi_channel 1
ftdi_layout_init 0x0008 0x000b

#  ftdi_layout_signal nSRST -data 0x0020 -oe 0x0020

transport select jtag
adapter speed 1000
reset_config srst_only
adapter srst delay 100

set CHIPNAME imx8mm

source [find target/imx8m.cfg]

Hi @ierturk

Thanks for writing to the Toradex Community!

Could you describe your application? What are you using JTAG for on the SoM Verdin iMX8MM?

Best regards,

It is described in environment section of the post as following

Verdin iMX8mm Q 2GB WB IT V1.1A
Dahlia V1.0.C 

I would like to debug an application on M4 core.

Hi @ierturk

Thanks for this information.

Unfortunately the feature M4 is not supported on Verdin iMX8MM yet and won’t be supported in near Future. I am sorry to not providing you a better answer.

Best regards,

Hi @jaski.tx,

Thanks for the reply. There is hardware support on the carrier board and the SOM. What is the reason that you don’t support the JTAG debugging. Is the reason related Linux or U-Boot ? There is iMX8m EVK boards from NXP that support JTAG.


Actually JTAG is used for debugging the M4 and currently nobody tested this since we don’t support M4. I am really sorry.

Best regards,