Connection faild to remote JlinkGDBServer

[sinkyl]

Hi,

I am able to debug locally but not remotely.

SETUP

Board:

• Laird Pinnacle 100 dvk
• Nordic Cortex-M4F, nRF52840 mcu
• Sierra HL7800 (modem) mcu
• J-Link on board
• SWD

RTOS:

• Zephyr

Local setup:

• Ubuntu 18.04.5
• Vscode 1.50.1
• gcc-arm-none-eabi-9-2020-q2-update-x86_64-linux
• Segger 686d
• Nordic tools 10.10.0

Server setup:

• Raspberry pi 3b+
• Ubuntu 18.04.5 headless
• Board connected with USB, SWD

LAUNCH.JSON

Local connection settings (working):

        {
            "name": "Client Debug nRF52840 J-Link",
            "type": "cortex-debug",
            "request": "launch",
            "interface": "swd",
            "cwd": "${workspaceFolder}",
            "executable": "pinnacle-100/build/${input:test-bench}/zephyr/zephyr.elf",
            "svdFile": "${env:HOME}/zephyrproject/modules/hal/nordic/nrfx/mdk/nrf52840.svd",
            "servertype": "jlink",
            "device": "nRF52840_xxAA",
            "targetId": "nrf52",
            "armToolchainPath": "${env:HOME}/gcc-arm-none-eabi/bin",
            "gdbTarget": "/usr/bin/gdb-multiarch",
            "runToMain": true
        },

For the remote connection settings, I have at least the local connection settings but I tried other parameters to connect to the remote server and it didn't worked. Remote settings:

            "name": "Server Debug nRF52840 J-Link",
            "type": "cortex-debug",
            "request": "launch",
            "interface": "swd",
            "cwd": "${workspaceFolder}",
            "executable": "pinnacle-100/build/${input:test-bench}/zephyr/zephyr.elf",
            "svdFile": "${env:HOME}/zephyrproject/modules/hal/nordic/nrfx/mdk/nrf52840.svd",
            "servertype": "jlink",
            "device": "nRF52840_xxAA",
            "targetId": "nrf52",
            "armToolchainPath": "${env:HOME}/gcc-arm-none-eabi/bin",
            "gdbTarget": "/usr/bin/gdb-multiarch",
            "runToMain": true,
            "debuggerArgs": [
                "file",
                "/home/sinan/projects/pinnacle-100/build/${input:test-bench}/zephyr/zephyr.elf"
            ]

1. I select the Server debug

2. Debug Console shows

   Reading symbols from '/path/to/elfprojectr/zephyr.elf'
   Finished reading symbols
   Please check OUTPUT tab (Adapter Output) for output from JLinkGDBServer
   Launching server: "JLinkGDBServer" "-if" "swd" "-port" "50000" "-swoport" "50001" "-telnetport" "50002" "-device" "nRF52840_xxAA"

3. this shows

4. After filing the ip and the port in time, this shows

5. And the remote server shows

It connects to the server but don't keep it. I think it is waiting for some data as input but it doesn't get any then it close the socket.

I give a try with Native-Debug with the bellow settings, and it works, well not exactly the debug pointer was pointing in a thread. Better then nothing.

        {
            "type": "gdb",
            "request": "attach",
            "name": "Attach to gdbserver",
            "executable": "pinnacle-100/build/${input:test-bench}/zephyr/zephyr.elf",
            "target": "192.168.2.39:2331",
            "remote": true,
            "cwd": "${workspaceRoot}",
            "valuesFormatting": "parseText",
            "gdbpath": "${env:HOME}/gcc-arm-none-eabi/bin/arm-none-eabi-gdb"
        },

Any help to setup Cortex-Debug to connect remotely will be much appreciated. (lack of documentation)

[sinkyl]

Finally it did worked, there is no bug but lack of documentation. I am coming with a complete solution then I will close the "issue".