Connect In-Circuit Debugger

Revision History

Version Description of Changes Date
1.0 Initial Version 12/12/2022




You need to have built the SDK by following the Getting Started Guide. If you installed the SDK at the default location in /opt/poky, we need the gdb binary from:


To build OpenOCD you can use this script, e.g.:

$ wget
$ chmod +x build_openocd
$ ./build_openocd

Connect to the Board


Power cycle the MistyCarrier board, with both switches, 1 & 2 on SW1 in the OFF position.


Start OpenOCD with the following command:
$ sudo bin/openocd -f share/openocd/scripts/interface/jlink.cfg -c "set SOC G2L" -f share/openocd/scripts/target/renesas_rz_g2.cfg

and you expect it to start with the following message:

Info : JTAG tap: r9a07g044l.cpu tap/device found: 0x6ba00477 (mfg: 0x23b (ARM Ltd), part: 0xba00, ver: 0x6)
Info : r9a07g044l.a55.0: hardware has 6 breakpoints, 4 watchpoints
Info : starting gdb server for r9a07g044l.a55.0 on 3333
Info : Listening on port 3333 for gdb connections
Info : starting gdb server for r9a07g044l.m33 on 3334
Info : Listening on port 3334 for gdb connections
Info : gdb port disabled

After it has started as seen above, open a new terminal window to launch the gdb binary indicated above under Requirements. In the new window launch gdb from the installed SDK:

$ /opt/poky/3.1.14/sysroots/x86_64-pokysdk-linux/usr/bin/aarch64-poky-linux/aarch64-poky-linux-gdb Flash_Writer_SCIF_RZV2L_SMARC_PMIC_DDR4_2GB_1PCS.mot

with the Flash_Writer binary that was compiled following the instructions about building the bootloaders. Upon execution of the above command, a screen similar to the below is expected:

GNU gdb (GDB) 9.1
Copyright (C) 2020 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.
Type "show copying" and "show warranty" for details.
This GDB was configured as "--host=x86_64-pokysdk-linux --target=aarch64-poky-linux".
Type "show configuration" for configuration details.
For bug reporting instructions, please see:
Find the GDB manual and other documentation resources online at:

For help, type "help".
Type "apropos word" to search for commands related to "word"...
Reading symbols from Flash_Writer_SCIF_RZV2L_SMARC_PMIC_DDR4_2GB_1PCS.mot...
(No debugging symbols found in Flash_Writer_SCIF_RZV2L_SMARC_PMIC_DDR4_2GB_1PCS.mot)

upon which a connection to the remote target can be established by entering:

(gdb) target remote localhost:3333

this should be acknowledged in the other window where openocd was started with

Info : accepting 'gdb' connection on tcp/3333
Info : New GDB Connection: 1, Target r9a07g044l.a55.0, state: halted

entering the command

gdb) monitor reset init

will reset the MPU which can be confirmed by watching the output on the serial console.
Follow info on Z-G/RZG2 Eclipse develop and debug to setup Eclipse with OCD for debugging Flash Writer.