Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/stm32/stm32f3/STM32F302/TIM2/CNT#0x0
counter
Low counter value
High counter value
if IUFREMAP=0 than CNT with read write access else UIFCPY with read only access
https://github.com/modm-io/cmsis-svd-stm32