For the evaluation of a J1939 ECU on the STMicroelectronics STM32L5 microcontroller,
emotas offers an example project for the STM32CubeIDE.

The STM32L552E-EV is used as the evaluation board.
Detailed information on the board can found here: Link

The contained emotas J1939 evaluation library
includes the following features:

• • BAM Support
  • CMDT Support
  • PGN Request Support
  • Proprietary Support

The following limitations apply:

• Run time of approximately 60 minutes
• 5 PGNs total

Download: J1939 STM32L5 example