the qspi flash memory device S25FL512S here https://github.com/STMicroelectronics/stm32-s25fl512s Is there any low level driver code for risc-v or other cpu ?

[Tesla DeLorean]

Expect you'll need to port to your own platforms

https://github.com/STMicroelectronics/STM32CubeF4/blob/master/Drivers/BSP/STM32469I_EVAL/stm32469i_eval_qspi.c

https://github.com/STMicroelectronics/STM32CubeF4/blob/master/Drivers/BSP/STM32469I_EVAL/stm32469i_eval_qspi.c#L443