Choosing a specific device in JTAG chain

[Visques]

Hi,

I can't seem to find the launch configuration setting to specify a device in the JTAG chain by its position and IRpre length. I'm using a J-link programmer and I can usually do this from the command line by passing the -jtagconf x,y argument to the J-link executable. However, the debug console in VScode shows that the debug launch config called the Segger J-link GDB server without this argument. I can't seem to find how to make the debug config to append this to the J-link server call

 

Is this supported by the STM32Cube extension?

Thanks

[Florent V]

Hi Visques,

The attribute serverJtagCfg will be available in the next delivery (planned for the end of November).

In the meantime, you can use the generic debug configuration to pass the -jtagconf argument in the serverParameters attribute.

Ex: 

 {
 "type": "stgdbtarget",
 "request": "launch",
 "name": "STM32Cube: STM32 Launch Generic GDB Server",
 "origin": "snippet",
 "cwd": "${workspaceFolder}",
 "preBuild": "${command:st-stm32-ide-debug-launch.build}",
 "program": "${command:st-stm32-ide-debug-launch.get-projects-binary-from-context1}",
 "gdb": "${command:st-stm32-ide-debug-launch.get-gdb-executable}",
 "serverExe": "JLinkGDBServerCL",
 "serverParameters": ["-s", "-if", "jtag", "-device", "STM32H723ZG", "-speed", "4000", "-endian", "little", "-novd", "-jtagconf", "9,2"],
 "serverHost": "localhost",
 "serverPort": "2331",
 "serverCwd": "<Path to your JLink installation>",
 "runEntry": "main",
 "imagesAndSymbols": [
 {
 "imageFileName": "${command:st-stm32-ide-debug-launch.get-projects-binary-from-context1}",
 "imageOffset": "",
 "symbolFileName": "${command:st-stm32-ide-debug-launch.get-projects-binary-from-context1}",
 "symbolOffset": ""
 }
 ],
 "verbose": true
 },

 
(Note: Update the serverCwd attribute with your path)

Best Regards,
Flo

[Visques]

Thanks for your quick reply. I'll wait until the next update then

[Florent V]

Hi @Visques ,

Thanks to the latest 3.7.0 release, the attribute for JTAG configuration is now available.

"serverJtagCfg": "<IRPre>,<DRPre>",

With the tooltip:

 

Regards,
Flo

 

 

 

[Visques]

Thanks so much! 

 

Btw: Not sure if the information box should say TDO instead of TDI? Usually IRPre and DRPre are counted from TDO

[Visques]

One more thing: How can I attach to a running STM32 target by using its specific JTAG address? If I select "attach" in "request" the "serverJtagCfg" option becomes invalid. 

Thanks