How to access UID_BASE from non-secure app in STM32H573?

H5 has Secure Manager provisioned, and got exception when trying to access UID_BASE to retrieve device ID.

#define UID_BASE (0x08FFF800UL) /*!< Unique device ID register base address */

Best answer by Jocelyn RICARD

Hello @Thatseasy

To be able to read into system flash you need to disable the cache associated to this area.

This can be done by setting non cacheable attribute this this region.

You have an example for accessing this UID in the STM32CubeH5 here:

STM32Cube_FW_H5_V1.3.0\Projects\NUCLEO-H563ZI\Examples_LL\UTILS\UTILS_ReadDeviceInfo\

Best regards

Jocelyn

ST Employee