I found the reason for this error:
"No service available" is displayed when the STM32 extension cannot start the "cmsis-scanner". This is a command-line tool automatically installed by the bundle-manager of the extension. Essentially the extension tries to run this command:
& "$env:LocalAppData\stm32cube\bundles\cube-wrapper\0.8.3\bin\cube.exe" cmsis-scanner --launch-service
When the command fails for whatever reason, the extension displays the message "No service available".
To find the root cause:
- Exit VS Code
- Use task manager to ensure no "cube.exe" process is running
- Run the above command manually on the powershell.
In my case, the error was:
CLIENT: Failed to bind 127.0.0.1:32125: Os { code: 10013, kind: PermissionDenied, message: "An attempt was made to access a socket in a way forbidden by its access permissions." }, assuming our service is already running
i.e. the tool can't open the TCP port 32125. Apparently a common cause for blocked ports on Windows is Hyper-V or Winnat.
Here is a solution for reserving this port for regular applications, such that Winnat/Hyper-V don't occupy it.
I solved the issue by running:
netsh interface ipv4 show excludedportrange protocol=tcp
net stop winnat
netsh interface ipv4 show excludedportrange protocol=tcp
netsh int ipv4 add excludedportrange protocol=tcp startport=32125 numberofports=1
net start winnat
Hope this helps anyone stuck on this issue.
