Hi,
ST25R3911B-DISCO is a ready-to-use kit with a PC GUI interacting with the embedded FW. The source code for the FW is available in STSW-ST25R002 (Firmware for ST25R3911B-DISCO kit (Source)) with a Keil µVision project. The support of STM32Cube is not provided.
If you are looking for a development board with FW package available for STM32Cube, I would rather recommand to use the X-NUCLEO-NFC05A1 board and the X-CUBE-NFC5 FW package.
Rgds
BT
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