Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/stm32/stm32f2/STM32F215/CRYP/CR#0x0
control register
Algorithm direction
Algorithm mode
Data type selection
Key size selection (AES mode only)
FIFO flush
Cryptographic processor enable
https://github.com/modm-io/cmsis-svd-stm32