[OpenOCD-user] how to use with EFM32 STK

[Peter A. B. <pa...@pa...>]

I see that support for EFM32 was added back in 0.7.0, but I'm unable to 
figure out how to use it with the on-board STLink on my EFM32GG-STK3700 
Giant Gecko eval board.  I can find no board files (like 
board/ek-tm4c123gxl.cfg which I use for Tiva), but only 
target/efm32_stlink.cfg.  Substituting that results in a "Debug adapter 
doesn't support any transports?" error.  (I am able to use JLinkExe and 
JLinkGDBServer so the board is functional.)

 From searching I think this means I'm missing interface/board scripts, 
but I can't find them and have no clue how to write them.

Is it possible to connect to the built-in stlink debugger on EFM32 kits 
with openocd (and if so, how), or is the new interface only for external 
STLink hardware?

Thanks.

Peter