Request to Add J-Link and ST-Link Upload & Debug Support to RP2040 Pico

[zpm1066]

Currently, PlatformIO only seems to support cmsis-dap and raspberry-swd debug options. jlink and stlink do not appear to be supported.

SEGGER have updated their J-Link probe firmware to support Pico uploads (flash to QSPI) and debugging, see https://www.segger.com/products/debug-probes/j-link/ for Release Notes.

I've been able to debug a Pico using a combination of VSCODE + cmake + Picoprobe and the PlatformIO Debugger. In addition, a Pico elf can be debugged using a SEGGER Educ Mini probe & Ozone Debugger combination.

I'm not sure what changes are required in PlatformIO Debugger to work but the Raspberry Pico probe needed OpenOCD to be built with the Picoprobe driver, as detailed in the Raspberry Pi documentation at https://datasheets.raspberrypi.org/pico/getting-started-with-pico.pdf.

It would be highly productive if we can have an out-of-the-box jlink (and stlink) support for RP2040 Pico upload & debug.

I'm available to assist with any testing required to support this feature request.

Your efforts to provide a complete PlatformIO support for the RP2040 are much appreciated by all of us in the PlatformIO and Raspberry Pi communities. Thanks you.

[zpm1066]

Raspberry Pi Picoprobe seems to be using the rp2040_jlink forked branch of OpenOCD with jlink probe.
https://github.com/raspberrypi/openocd/tree/rp2040_jlink

[valeros]

Hi @zpm1066 ! J-Link should be available in the dev branch. Would be great if you could try the following configuration for both uploading and debugging:

[env:pico]
platform = raspberrypi
framework = arduino
board = pico

upload_protocol = jlink
debug_tool = jlink

As for ST-Link, it seems that it's not compatible with RP2040, at least now raspberrypi/openocd#13

[zpm1066]

Hi @valeros,

PlatformIO sees jlink as unknown debug tool. So, I tried a few different things.

Environment: macOS 11.3.1, VSCODE: 1.56.0, PlatformIO 2.3.2
Debug Probe: Segger Edu Mini with the latest firmware

Previously, I've successfully used the above Edu Mini to debug a Pico using VSCODE + Picoprobe + PlatformIO Debugger.

Would it be possible to provide a version of PlatformIO that recognizes jlink as a valid debug tool?

Regarding the error Writing target memory failed in Method #2, I'll raise it with the SEGGER online Support forum to see if they can assist.

I'm available for further testing as required. Thank you.

Method #1

I used the following platformio.ini, as per your suggestion.

[env:pico]
platform = raspberrypi
framework = arduino
board = pico
upload_protocol = jlink
debug_tool = jlink
debug_init_break = tbreak main

I got the following output, with error Unknown debug tool jlink and unable to build successfully.

> Executing task in folder tiny2040_blink: platformio run <

Processing pico (platform: raspberrypi; framework: arduino; board: pico)
-------------------------------------------------------------------------------------------------------------------------------------------------
Verbose mode can be enabled via `-v, --verbose` option
**DebugInvalidOptionsError: Unknown debug tool `jlink`. Please use one of `cmsis-dap, raspberrypi-swd` or `custom`:**
  File "/Users/quark11/.platformio/penv/lib/python3.9/site-packages/platformio/builder/main.py", line 177:
    env.SConscript("$BUILD_SCRIPT")
  File "/Users/quark11/.platformio/packages/tool-scons/scons-local-4.1.0/SCons/Script/SConscript.py", line 591:
    return _SConscript(self.fs, *files, **subst_kw)
  File "/Users/quark11/.platformio/packages/tool-scons/scons-local-4.1.0/SCons/Script/SConscript.py", line 280:
    exec(compile(scriptdata, scriptname, 'exec'), call_stack[-1].globals)
  File "/Users/quark11/.platformio/platforms/raspberrypi/builder/main.py", line 121:
    target_elf = env.BuildProgram()
  File "/Users/quark11/.platformio/packages/tool-scons/scons-local-4.1.0/SCons/Util.py", line 658:
    return self.method(*nargs, **kwargs)
  File "/Users/quark11/.platformio/penv/lib/python3.9/site-packages/platformio/builder/tools/platformio.py", line 61:
    env.ProcessProgramDeps()
  File "/Users/quark11/.platformio/packages/tool-scons/scons-local-4.1.0/SCons/Util.py", line 658:
    return self.method(*nargs, **kwargs)
  File "/Users/quark11/.platformio/penv/lib/python3.9/site-packages/platformio/builder/tools/platformio.py", line 113:
    env.PrintConfiguration()
  File "/Users/quark11/.platformio/packages/tool-scons/scons-local-4.1.0/SCons/Util.py", line 658:
    return self.method(*nargs, **kwargs)
  File "/Users/quark11/.platformio/penv/lib/python3.9/site-packages/platformio/builder/tools/pioplatform.py", line 234:
    _get_debug_data(),
  File "/Users/quark11/.platformio/penv/lib/python3.9/site-packages/platformio/builder/tools/pioplatform.py", line 198:
    % board_config.get_debug_tool_name(env.GetProjectOption("debug_tool")),
  File "/Users/quark11/.platformio/penv/lib/python3.9/site-packages/platformio/platform/board.py", line 139:
    raise DebugInvalidOptionsError(

Method #2

Used debug tool custom but kept jlink as the upload_protocol, as in below. I was able to build a simple blink sketch fine but the jlink upload failed with error Writing target memory failed.

[env:pico]
platform = raspberrypi
framework = arduino
board = pico
upload_protocol = jlink
debug_tool = custom
debug_init_break = tbreak main

> Executing task in folder tiny2040_blink: platformio run --target upload <

Processing pico (platform: raspberrypi; framework: arduino; board: pico)
-------------------------------------------------------------------------------------------------------------------------------------------------
Verbose mode can be enabled via `-v, --verbose` option
CONFIGURATION: https://docs.platformio.org/page/boards/raspberrypi/pico.html
PLATFORM: Raspberry Pi RP2040 (1.0.0+sha.6916058) > Raspberry Pi Pico
HARDWARE: RP2040 133MHz, 264KB RAM, 2MB Flash
DEBUG: Current (custom) External (cmsis-dap, raspberrypi-swd)
PACKAGES: 
 - framework-arduino-mbed 2.0.0 
 - tool-jlink 1.72000.0 (7.20.0) 
 - tool-openocd-raspberrypi 2.1100.0 (11.0) 
 - tool-rp2040tools 1.0.2 
 - toolchain-gccarmnoneeabi 1.90201.191206 (9.2.1)
LDF: Library Dependency Finder -> http://bit.ly/configure-pio-ldf
LDF Modes: Finder ~ chain, Compatibility ~ soft
Found 26 compatible libraries
Scanning dependencies...
No dependencies
Building in release mode
Checking size .pio/build/pico/firmware.elf
Advanced Memory Usage is available via "PlatformIO Home > Project Inspect"
RAM:   [==        ]  18.7% (used 50500 bytes from 270336 bytes)
Flash: [          ]   3.5% (used 73320 bytes from 2097152 bytes)
Configuring upload protocol...
AVAILABLE: cmsis-dap, jlink, picotool, raspberrypi-swd
CURRENT: upload_protocol = jlink
Uploading .pio/build/pico/firmware.bin
SEGGER J-Link Commander V7.20 (Compiled Apr 28 2021 17:34:16)
DLL version V7.20, compiled Apr 28 2021 17:34:09


J-Link Command File read successfully.
Processing script file...

J-Link connection not established yet but required for command.
Connecting to J-Link via USB...O.K.
Firmware: J-Link EDU Mini V1 compiled Feb 18 2021 11:25:23
Hardware version: V1.00

License(s): FlashBP, GDB
VTref=3.294V
Target connection not established yet but required for command.
Device "RP2040_M0_0" selected.

Connecting to target via SWD
ConfigTargetSettings() start
J-Link script: ConfigTargetSettings()
ConfigTargetSettings() end
InitTarget() start
InitTarget() end
Found SW-DP with ID 0x0BC12477
DPIDR: 0x0BC12477
Scanning AP map to find all available APs
AP[1]: Stopped AP scan as end of AP map has been reached
AP[0]: AHB-AP (IDR: 0x04770031)
Iterating through AP map to find AHB-AP to use
AP[0]: Core found
AP[0]: AHB-AP ROM base: 0xE00FF000
CPUID register: 0x410CC601. Implementer code: 0x41 (ARM)
Found Cortex-M0 r0p1, Little endian.
FPUnit: 4 code (BP) slots and 0 literal slots
CoreSight components:
ROMTbl[0] @ E00FF000
ROMTbl[0][0]: E000E000, CID: B105E00D, PID: 000BB008 SCS
ROMTbl[0][1]: E0001000, CID: B105E00D, PID: 000BB00A DWT
ROMTbl[0][2]: E0002000, CID: B105E00D, PID: 000BB00B FPB
Cortex-M0 identified.
PC = 000020F0, CycleCnt = 00000000
R0 = 501008B0, R1 = 00000000, R2 = 00003ECC, R3 = 00000000
R4 = 50100E84, R5 = 00000000, R6 = 00000000, R7 = 50100EAC
R8 = FFFFFFFF, R9 = FFFFFFFF, R10= FFFFFFFF, R11= FFFFFFFF
R12= 50100000
SP(R13)= 50100898, MSP= 50100898, PSP= FFFFFFFC, R14(LR) = 000002B3
XPSR = 61000000: APSR = nZCvq, EPSR = 01000000, IPSR = 000 (NoException)
CFBP = 00000000, CONTROL = 00, FAULTMASK = 00, BASEPRI = 00, PRIMASK = 00
FPU regs: FPU not enabled / not implemented on connected CPU.

Downloading file [.pio/build/pico/firmware.bin]...
Writing target memory failed.

Reset delay: 0 ms
Reset type NORMAL: Resets core & peripherals via SYSRESETREQ & VECTRESET bit.
Reset: Halt core after reset via DEMCR.VC_CORERESET.
Reset: Reset device via AIRCR.SYSRESETREQ.


Script processing completed.

========================================================== [SUCCESS] Took 1.60 seconds ==========================================================

Terminal will be reused by tasks, press any key to close it.

[valeros]

My bad, sorry, you need this config:

[env:pico]
platform = https://github.com/platformio/platform-raspberrypi.git
framework = arduino
board = pico

upload_protocol = jlink
debug_tool = jlink

[zpm1066]

With the following config, I still get Error: Unknown debug tool jlink.

[env:pico]
platform = https://github.com/platformio/platform-raspberrypi.git
framework = arduino
board = pico

upload_protocol = jlink
debug_tool = jlink
debug_init_break = tbreak main

> Executing task in folder tiny2040_blink: platformio run <

Processing pico (platform: https://github.com/platformio/platform-raspberrypi.git; framework: arduino; board: pico)
-------------------------------------------------------------------------------------------------------------------------------------------------
Verbose mode can be enabled via `-v, --verbose` option
DebugInvalidOptionsError: Unknown debug tool `jlink`. Please use one of `cmsis-dap, raspberrypi-swd` or `custom`:
  File "/Users/quark11/.platformio/penv/lib/python3.9/site-packages/platformio/builder/main.py", line 177:
    env.SConscript("$BUILD_SCRIPT")
  File "/Users/quark11/.platformio/packages/tool-scons/scons-local-4.1.0/SCons/Script/SConscript.py", line 591:
    return _SConscript(self.fs, *files, **subst_kw)
  File "/Users/quark11/.platformio/packages/tool-scons/scons-local-4.1.0/SCons/Script/SConscript.py", line 280:
    exec(compile(scriptdata, scriptname, 'exec'), call_stack[-1].globals)
  File "/Users/quark11/.platformio/platforms/raspberrypi/builder/main.py", line 121:
    target_elf = env.BuildProgram()
  File "/Users/quark11/.platformio/packages/tool-scons/scons-local-4.1.0/SCons/Util.py", line 658:
    return self.method(*nargs, **kwargs)
  File "/Users/quark11/.platformio/penv/lib/python3.9/site-packages/platformio/builder/tools/platformio.py", line 61:
    env.ProcessProgramDeps()
  File "/Users/quark11/.platformio/packages/tool-scons/scons-local-4.1.0/SCons/Util.py", line 658:
    return self.method(*nargs, **kwargs)
  File "/Users/quark11/.platformio/penv/lib/python3.9/site-packages/platformio/builder/tools/platformio.py", line 113:
    env.PrintConfiguration()
  File "/Users/quark11/.platformio/packages/tool-scons/scons-local-4.1.0/SCons/Util.py", line 658:
    return self.method(*nargs, **kwargs)
  File "/Users/quark11/.platformio/penv/lib/python3.9/site-packages/platformio/builder/tools/pioplatform.py", line 234:
    _get_debug_data(),
  File "/Users/quark11/.platformio/penv/lib/python3.9/site-packages/platformio/builder/tools/pioplatform.py", line 198:
    % board_config.get_debug_tool_name(env.GetProjectOption("debug_tool")),
  File "/Users/quark11/.platformio/penv/lib/python3.9/site-packages/platformio/platform/board.py", line 139:
    raise DebugInvalidOptionsError(
========================================================== [FAILED] Took 0.56 seconds ==========================================================
The terminal process "platformio 'run'" terminated with exit code: 1.

Terminal will be reused by tasks, press any key to close it.

[valeros]

Hmm, is there any chance you have two instances of the raspberrypi platform installed? What is the output of pio platform show raspberrypi?

[zpm1066]

Here's the requested output.

quark11:tiny2040_blink quark11$ pio platform show raspberrypi
raspberrypi ~ Raspberry Pi RP2040
=================================
RP2040 is a low-cost, high-performance microcontroller device with with a large on-chip memory, symmetric dual-core processor complex, and rich peripheral.

Version: 1.0.0+sha.6916058
Home: https://www.raspberrypi.org/documentation/rp2040/getting-started/
Repository: https://github.com/platformio/platform-raspberrypi.git
Vendor: https://www.raspberrypi.org/documentation/rp2040/getting-started/
License: Apache-2.0
Frameworks: arduino

Packages
--------

Package toolchain-gccarmnoneeabi
--------------------------------
Type: toolchain
Requirements: ~1.90201.0
Installed: Yes
Version: 1.90201.191206
Original version: 9.2.1
Description: GNU toolchain for Arm Cortex-M and Cortex-R processors

Package framework-arduino-mbed
------------------------------
Type: framework
Requirements: ~2.0.0
Installed: Yes
Version: 2.0.0
Original version: None
Description: Arduino framework supporting mbed-enabled boards

Package tool-rp2040tools
------------------------
Type: uploader
Requirements: ~1.0.2
Installed: Yes
Version: 1.0.2
Original version: None
Description: Tools for interacting with a RP2040 device in BOOTSEL mode or with a RP2040 binary

Package tool-openocd-raspberrypi
--------------------------------
Type: uploader
Requirements: ~2.1100.0
Installed: Yes
Version: 2.1100.0
Original version: 11.0
Description: Open On-Chip Debugger for Raspberry Pi MCUs

Package tool-jlink
------------------
Type: uploader
Requirements: ~1.72000.0
Installed: Yes
Version: 1.72000.0
Original version: 7.20.0
Description: Software and Documentation Pack for SEGGER J-Link debug probes

Boards
------
ID                 MCU     Frequency    Flash    RAM    Name
-----------------  ------  -----------  -------  -----  ---------------------------
nanorp2040connect  RP2040  133MHz       2MB      264KB  Arduino Nano RP2040 Connect
pico               RP2040  133MHz       2MB      264KB  Raspberry Pi Pico

[valeros]

As I thought, you have the dev platform installed from this repository, but it's outdated. Please run pio platform update raspberrypi and try again.

[zpm1066]

OK. I've updated the platform.

Here's the output:

> Executing task in folder tiny2040_blink: platformio run --target upload <

Processing pico (platform: https://github.com/platformio/platform-raspberrypi.git; framework: arduino; board: pico)
-------------------------------------------------------------------------------------------------------------------------------------------------
Verbose mode can be enabled via `-v, --verbose` option
CONFIGURATION: https://docs.platformio.org/page/boards/raspberrypi/pico.html
PLATFORM: Raspberry Pi RP2040 (1.0.0+sha.5271d82) > Raspberry Pi Pico
HARDWARE: RP2040 133MHz, 264KB RAM, 2MB Flash
DEBUG: Current (jlink) External (cmsis-dap, jlink, raspberrypi-swd)
PACKAGES: 
 - framework-arduino-mbed 2.0.0 
 - tool-jlink 1.72000.0 (7.20.0) 
 - tool-openocd-raspberrypi 2.1100.0 (11.0) 
 - tool-rp2040tools 1.0.2 
 - toolchain-gccarmnoneeabi 1.90201.191206 (9.2.1)
LDF: Library Dependency Finder -> http://bit.ly/configure-pio-ldf
LDF Modes: Finder ~ chain, Compatibility ~ soft
Found 26 compatible libraries
Scanning dependencies...
No dependencies
Building in release mode
Compiling .pio/build/pico/src/main.cpp.o
Compiling .pio/build/pico/FrameworkArduinoVariant/double_tap_usb_boot.c.o
Compiling .pio/build/pico/FrameworkArduinoVariant/variant.cpp.o
Compiling .pio/build/pico/FrameworkArduino/Interrupts.cpp.o
Compiling .pio/build/pico/FrameworkArduino/Serial.cpp.o
Compiling .pio/build/pico/FrameworkArduino/Tone.cpp.o
Archiving .pio/build/pico/libFrameworkArduinoVariant.a
Compiling .pio/build/pico/FrameworkArduino/USB/PluggableUSBDevice.cpp.o
Indexing .pio/build/pico/libFrameworkArduinoVariant.a
Compiling .pio/build/pico/FrameworkArduino/USB/USBCDC.cpp.o
Compiling .pio/build/pico/FrameworkArduino/USB/USBSerial.cpp.o
Compiling .pio/build/pico/FrameworkArduino/WMath.cpp.o
Compiling .pio/build/pico/FrameworkArduino/abi.cpp.o
Compiling .pio/build/pico/FrameworkArduino/api/Common.cpp.o
Compiling .pio/build/pico/FrameworkArduino/api/IPAddress.cpp.o
Compiling .pio/build/pico/FrameworkArduino/api/PluggableUSB.cpp.o
Compiling .pio/build/pico/FrameworkArduino/api/Print.cpp.o
Compiling .pio/build/pico/FrameworkArduino/api/Stream.cpp.o
Compiling .pio/build/pico/FrameworkArduino/api/String.cpp.o
Compiling .pio/build/pico/FrameworkArduino/itoa.c.o
Compiling .pio/build/pico/FrameworkArduino/main.cpp.o
Compiling .pio/build/pico/FrameworkArduino/mbed/platform/cxxsupport/mstd_mutex.cpp.o
Compiling .pio/build/pico/FrameworkArduino/pinToIndex.cpp.o
Compiling .pio/build/pico/FrameworkArduino/wiring.cpp.o
Compiling .pio/build/pico/FrameworkArduino/wiring_analog.cpp.o
Compiling .pio/build/pico/FrameworkArduino/wiring_digital.cpp.o
Compiling .pio/build/pico/FrameworkArduino/wiring_pulse.cpp.o
Compiling .pio/build/pico/FrameworkArduino/wiring_shift.cpp.o
Archiving .pio/build/pico/libFrameworkArduino.a
Indexing .pio/build/pico/libFrameworkArduino.a
Linking .pio/build/pico/firmware.elf
Generating UF2 image
/Users/quark11/.platformio/packages/tool-rp2040tools/elf2uf2 ".pio/build/pico/firmware.elf" ".pio/build/pico/firmware.uf2"
Checking size .pio/build/pico/firmware.elf
Advanced Memory Usage is available via "PlatformIO Home > Project Inspect"
RAM:   [==        ]  18.7% (used 50500 bytes from 270336 bytes)
Flash: [          ]   3.5% (used 73320 bytes from 2097152 bytes)
Building .pio/build/pico/firmware.bin
Configuring upload protocol...
AVAILABLE: cmsis-dap, jlink, picotool, raspberrypi-swd
CURRENT: upload_protocol = jlink
Uploading .pio/build/pico/firmware.bin
SEGGER J-Link Commander V7.20 (Compiled Apr 28 2021 17:34:16)
DLL version V7.20, compiled Apr 28 2021 17:34:09


J-Link Command File read successfully.
Processing script file...

J-Link connection not established yet but required for command.
Connecting to J-Link via USB...O.K.
Firmware: J-Link EDU Mini V1 compiled Feb 18 2021 11:25:23
Hardware version: V1.00

License(s): FlashBP, GDB
VTref=3.297V
Target connection not established yet but required for command.
Device "RP2040_M0_0" selected.


Connecting to target via SWD
ConfigTargetSettings() start
J-Link script: ConfigTargetSettings()
ConfigTargetSettings() end
InitTarget() start
InitTarget() end
Found SW-DP with ID 0x0BC12477
DPIDR: 0x0BC12477
Scanning AP map to find all available APs
AP[1]: Stopped AP scan as end of AP map has been reached
AP[0]: AHB-AP (IDR: 0x04770031)
Iterating through AP map to find AHB-AP to use
AP[0]: Core found
AP[0]: AHB-AP ROM base: 0xE00FF000
CPUID register: 0x410CC601. Implementer code: 0x41 (ARM)
Found Cortex-M0 r0p1, Little endian.
FPUnit: 4 code (BP) slots and 0 literal slots
CoreSight components:
ROMTbl[0] @ E00FF000
ROMTbl[0][0]: E000E000, CID: B105E00D, PID: 000BB008 SCS
ROMTbl[0][1]: E0001000, CID: B105E00D, PID: 000BB00A DWT
ROMTbl[0][2]: E0002000, CID: B105E00D, PID: 000BB00B FPB
Cortex-M0 identified.
PC = 10009B50, CycleCnt = 00000000
R0 = 0003D090, R1 = 01734736, R2 = 40054000, R3 = 0000BD21
R4 = 0003D090, R5 = 00000000, R6 = 00000003, R7 = 00000000
R8 = 00000000, R9 = 00000000, R10= 00000000, R11= 00000000
R12= 000000FA
SP(R13)= 2000AD00, MSP= 2003FFC0, PSP= 2000AD00, R14(LR) = 100092C7
XPSR = 81000000: APSR = Nzcvq, EPSR = 01000000, IPSR = 000 (NoException)
CFBP = 02000000, CONTROL = 02, FAULTMASK = 00, BASEPRI = 00, PRIMASK = 00
FPU regs: FPU not enabled / not implemented on connected CPU.

**Downloading file [.pio/build/pico/firmware.bin]...
Writing target memory failed.**

Reset delay: 0 ms
Reset type NORMAL: Resets core & peripherals via SYSRESETREQ & VECTRESET bit.
Reset: Halt core after reset via DEMCR.VC_CORERESET.
Reset: Reset device via AIRCR.SYSRESETREQ.


Script processing completed.

========================================================= [SUCCESS] Took 11.07 seconds =========================================================

Terminal will be reused by tasks, press any key to close it.

[valeros]

Debugging doesn't work as well, right?

[zpm1066]

Good news! Debug seems to work. Thank you.

[zpm1066]

I'm able to single step through the blink sketch (RGB version of blink) on my Pimoroni Tiny2040 which has a RGB neopixel.

Processing pico (platform: https://github.com/platformio/platform-raspberrypi.git; framework: arduino; board: pico)
--------------------------------------------------------------------------------
Verbose mode can be enabled via `-v, --verbose` option
CONFIGURATION: https://docs.platformio.org/page/boards/raspberrypi/pico.html
PLATFORM: Raspberry Pi RP2040 (1.0.0+sha.5271d82) > Raspberry Pi Pico
HARDWARE: RP2040 133MHz, 264KB RAM, 2MB Flash
DEBUG: Current (jlink) External (cmsis-dap, jlink, raspberrypi-swd)
PACKAGES: 
 - framework-arduino-mbed 2.0.0 
 - toolchain-gccarmnoneeabi 1.90201.191206 (9.2.1)
LDF: Library Dependency Finder -> http://bit.ly/configure-pio-ldf
LDF Modes: Finder ~ chain, Compatibility ~ soft
Found 26 compatible libraries
Scanning dependencies...
No dependencies
Building in debug mode
Checking size .pio/build/pico/firmware.elf
Advanced Memory Usage is available via "PlatformIO Home > Project Inspect"
RAM:   [==        ]  18.7% (used 50500 bytes from 270336 bytes)
Flash: [          ]   3.6% (used 75192 bytes from 2097152 bytes)
========================= [SUCCESS] Took 1.06 seconds =========================
SEGGER J-Link GDB Server V7.20 Command Line Version

JLinkARM.dll V7.20 (DLL compiled Apr 28 2021 17:34:09)

Command line: -singlerun -if SWD -select USB -device RP2040_M0_0 -port 2331
-----GDB Server start settings-----
GDBInit file:                  none
GDB Server Listening port:     2331
SWO raw output listening port: 2332
Terminal I/O port:             2333
Accept remote connection:      yes
Generate logfile:              off
Verify download:               off
Init regs on start:            off
Silent mode:                   off
Single run mode:               on
Target connection timeout:     0 ms
------J-Link related settings------
J-Link Host interface:         USB
J-Link script:                 none
J-Link settings file:          none
------Target related settings------
Target device:                 RP2040_M0_0
Target interface:              SWD
Target interface speed:        4000kHz
Target endian:                 little

Connecting to J-Link...
J-Link is connected.
Firmware: J-Link EDU Mini V1 compiled Feb 18 2021 11:25:23
Hardware: V1.00

Feature(s): FlashBP, GDB
Checking target voltage...
Target voltage: 3.30 V
Listening on TCP/IP port 2331
Connecting to target...
Connected to target
Waiting for GDB connection...
Reading symbols from /Users/quark11/Documents/PlatformIO/CompletedProjects/pico_arduino/tiny2040_blink/.pio/build/pico/firmware.elf...
PlatformIO Unified Debugger -> http://bit.ly/pio-debug
PlatformIO: debug_tool = jlink
PlatformIO: Initializing remote target...
Connected to 127.0.0.1
Reading all registers
Read 4 bytes @ address 0x10009B50 (Data = 0xBD10D3FB)
Read 2 bytes @ address 0x10009B50 (Data = 0xD3FB)
0x10009b50 in busy_wait_us_32 ()
Reading 64 bytes @ address 0x10009B40
Received monitor command: clrbp
Received monitor command: speed auto
Select auto target interface speed (2000 kHz)
Select auto target interface speed (2000 kHz)
Received monitor command: reset
Resetting target
Resetting target
Received monitor command: halt
Halting target CPU...
...Target halted (PC = 0x000000EE)
Loading section .boot2, size 0x100 lma 0x10000000
Downloading 256 bytes @ address 0x10000000
Loading section .text, size 0xd6e8 lma 0x10000100
Downloading 15984 bytes @ address 0x10000100
Downloading 15920 bytes @ address 0x10003F70
Downloading 15920 bytes @ address 0x10007DA0
Downloading 7192 bytes @ address 0x1000BBD0
Loading section .rodata, size 0x225c lma 0x1000d7e8
Downloading 8796 bytes @ address 0x1000D7E8
Loading section .ARM.exidx, size 0x8 lma 0x1000fa44
Downloading 8 bytes @ address 0x1000FA44
Loading section .data, size 0x2c6c lma 0x1000fa4c
Downloading 11372 bytes @ address 0x1000FA4C
Loading section .uninitialized_ram.magic_location, size 0xc lma 0x100126b8
Downloading 12 bytes @ address 0x100126B8
Start address 0x100001d4, load size 75460
Writing register (PC = 0x100001d4)
Transfer rate: 9211 KB/sec, 8384 bytes/write.
Read 4 bytes @ address 0x100001D4 (Data = 0x49202000)
Read 2 bytes @ address 0x100001D4 (Data = 0x2000)
Reading 64 bytes @ address 0x10002380
Read 2 bytes @ address 0x100023AA (Data = 0xF000)
Temporary breakpoint 1 at 0x100023aa: file /Users/quark11/.platformio/packages/framework-arduino-mbed/cores/arduino/main.cpp, line 36.
PlatformIO: Initialization completed
Reading 64 bytes @ address 0x10000300
Read 2 bytes @ address 0x1000032C (Data = 0x2101)
Reading 64 bytes @ address 0x10000340
Read 2 bytes @ address 0x10000360 (Data = 0x2103)
PlatformIO: Resume the execution to `debug_init_break = tbreak main`
PlatformIO: More configuration options -> http://bit.ly/pio-debug
Setting breakpoint @ address 0x1000032C, Size = 2, BPHandle = 0x0001
Setting breakpoint @ address 0x10000360, Size = 2, BPHandle = 0x0002
Setting breakpoint @ address 0x100023AA, Size = 2, BPHandle = 0x0003
Starting target CPU...
...Breakpoint reached @ address 0x1000032C
Reading all registers
Removing breakpoint @ address 0x1000032C, Size = 2
Removing breakpoint @ address 0x10000360, Size = 2
Removing breakpoint @ address 0x100023AA, Size = 2
Read 4 bytes @ address 0x1000032C (Data = 0x20132101)
Reading 64 bytes @ address 0x20041F00
WARNING: Failed to read memory @ address 0x60984388

Breakpoint 2, blink (led=-1, n=-1) at src/main.cpp:19
19	        digitalWrite(LED_GREEN_PIN, HIGH);
WARNING: Failed to read memory @ address 0x60984388

[zpm1066]

Odd that the release upload doesn't work but debug look fine so far.

Here are a few photos.

[vorosj]

Is it possible to use the Segger tools instead of the openocd? Something like this:
debug_server =
/full/path/to/JLinkGDBServerCL
And a custom upload protocol pointing to J-Flash Lite?