I was able to get paddles working great with Recalbox Atari 2600 games using iCode retro plus USB Adapter. Checkout this video for a walkthrough on how:  https://youtu.be/hAiFOSPVE2E

RetroPie and Windows Retroarch have core download access so you can download Stella2014 within the system. Emuelec or Batocera don't have core download access so steps are similar to Recalbox as shown in the video, but you may need a different file based on your hardware below.

For ARM S922X based systems like Odroid N2+/N2L, you can use the following if your platform does not have core downloads access: stella2014_libretro_ARM_S9xx.zip

For Odroid XU4: stella2014_libretro_xu4.zip