[OpenOCD-user] OpenOCD JTAG Debugging with iMX8M Mini AMP and FTDI.

[Hiago F. <hia...@gm...>]

Hello all!

I'm new to OpenOCD, so I'm sorry if I make some mistakes here.

I have an iMX8M Mini and it has 4x Cortex A73 and 1x Cortex M4F. I'm trying
to debug the auxiliary core, the Cortex M4. The JTAG is connected to
channel 1 of FT4232 chip.
Below is the code I've been trying to run:





















*adapter driver ftdiftdi vid_pid 0x0403 0x6011ftdi channel 1ftdi
layout_init 0x00f8 0x000b#ftdi layout_signal RESET_B     -data 0x0010 -oe
0x0010#ftdi layout_signal nSRST       -data 0x0020 -oe 0x0020#ftdi
layout_signal IO_nRST     -data 0x0040 -oe 0x0040#ftdi layout_signal
ONOFF_B     -data 0x0080 -oe 0x0080transport select jtagadapter speed 1000#
board has i.MX8MM with 4 Cortex-A53 coresset CHIPNAME imx8mmset CHIPCORES
4# Source SOC Configurationsource [find imx8m.cfg]*

I also changed the file *imx8m.cfg*, and changed the *-defer-examine*:












*# declare the auxiliary Cortex-M4 core on AP #4#target create
${_CHIPNAME}.m4 cortex_m -dap ${_CHIPNAME}.dap -ap-num 4 \#
-defer-examine# AHB-AP for direct access to soc bustarget create
${_CHIPNAME}.ahb mem_ap -dap ${_CHIPNAME}.dap -ap-num 0# default target is
A53 core 0targets $_TARGETNAME.0# declare the auxiliary Cortex-M4 core on
AP #4target create ${_CHIPNAME}.m4 cortex_m -dap ${_CHIPNAME}.dap -ap-num 4*

I tried to set the default target and also to uncomment the* ftdi layout.*

I can see openocd detects it:








*> targets     TargetName         Type       Endian TapName
 State       --  ------------------ ---------- ------ ------------------
------------ 0  imx8mm.a53.0       aarch64    little imx8mm.cpu
running 1  imx8mm.a53.1       aarch64    little imx8mm.cpu         examine
deferred 2  imx8mm.a53.2       aarch64    little imx8mm.cpu         examine
deferred 3  imx8mm.a53.3       aarch64    little imx8mm.cpu         examine
deferred 4  imx8mm.ahb         mem_ap     little imx8mm.cpu
running 5* imx8mm.m4          cortex_m   little imx8mm.cpu         reset*

I keep getting this error:







*Info : accepting 'gdb' connection on tcp/3334Error: timed out while
waiting for target haltedError executing event gdb-attach on target
imx8mm.m4:Info : New GDB Connection: 1, Target imx8mm.m4, state: resetWarn
: GDB connection 1 on target imx8mm.m4 not haltedInfo : Halt timed out,
wake up GDB.*

And from the arm-none-eabi-gdb side:





*Reading symbols from hello_world.elf...(gdb) target extended-remote
localhost:3334Remote debugging using localhost:33340x00000000 in ?? ()(gdb)*


Does anyone know how to solve it or have any comments that could help me
with that?

Thanks in advance!