Unable to access Calibration Words with STM32H503RBT

[M_Deloizy]

I try to read VREFINT_CAL word :

 

 

uint16_t *VREFINT_CAL=(uint16_t *)(0x08FFF810);
uint16_t v = *VREFINT_CAL;

 

 

When running, Hard fault interrupt is called.

Memory protect seems not active (MPU not used, GTZC not enabled).

What can be the problem ?

Thanks.

[mƎALLEm]

Hello,

This behavior is observed when the ICACHE is enabled and when RO and OTP regions are accessed. So you need to use the MPU.

Please refer to this article: https://community.st.com/t5/stm32-mcus/how-to-avoid-a-hardfault-when-icache-is-enabled-on-the-stm32h5/ta-p/630085

 

 

[M_Deloizy]

Thanks very much. It's now Ok !