Do I have to use STM32 HAL for Keil uvision Run Time Environment ( Device start up File

[AElah.1]

I am Using STM32L152 with Keil uvision5 and for setup Run Time Environment must selct STM32cube HAL library, do I have to use HAL or I can use only device start up

[FBL]

Hello @AElah.1​,

Indeed, it is possible to use device's startup file. However, It is recommended to use HAL for ease of use and functionalities.