Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/STMicroelectronics/STM32F3x8/CAN/MCR#0x0
master control register
INRQ
SLEEP
TXFP
RFLM
NART
AWUM
ABOM
TTCM
RESET
DBF
https://github.com/cmsis-svd/cmsis-svd-data