About Gpeti

Gpeti · 2024-07-22

Hello,Since several weeks I had program loading issues using Lauterbach Trace32 debugger on a STM32H753.It came out it is due to the issue described here: https://community.st.com/t5/missing-articles/faq-stm32h7-sram-backup-sram-content-is-not-preser...

Gpeti · 2024-04-30

I don't understand the goal of pin PDR_ON.From STM32H7 reference manual: I don't understand what "the power on/off reset function can be disabled" means. The product does not go to reset state even if the voltage goes below PDR threshold ?

Gpeti · 2024-03-26

Hello,I'm a bit confused about stack management on Cortex M7.In my SW I only use the MSP.I understood that the MSP can only be modified with a MSR instruction. However the SP can be modified with a "simple" LDR instruction.Does that mean that when I ...

Gpeti · 2024-03-11

The notion of group priority and subpriority is not very clear in the STM32H7 programming manual.First the manual states that: According to the value of the register AIRCR (0xFA050000) the splitting between group priority and subpriority for interrup...

Gpeti · 2024-02-09

We don't understand the bit SCUEN of STM32H7. The description is not very clear: Could you explain what SCUEN means and if the software is supposed to write or read this bit and why ?

Gpeti · 2024-07-23

"Try adding. = ALIGN(8);at the end of given section." That's exactly what I did. Doesn't change the size of the section (in the .map file at least), it only adds some zeros in between sections.I think it is better to do as suggested in the Ref manua...

Gpeti · 2024-07-22

I'm not sure it's so simple. With GCC even if you add a ". = ALIGN(8)" directive after a section, the size of the section is still not a multiple of 8 bytes. Is there a way to force the size of a section ? Also a debugger is usually loading a elf fil...

Gpeti · 2024-07-22

"Writing to SRAM, resetting, and then relying on that value is a relatively uncommon thing to do". indeed you're right. However load code directly in RAM in debug phase is not so uncommon. I will check with lauterbach why they suggest to work this wa...

Gpeti · 2024-03-11

Thank you, I was missing this table. Would be nice to put it in the reference manual or programming manualIt's a bit weird that the default value of PRIGROUP in AIRCR is not a valid value (even if I understood that it works fine with the 4 bits being...

Gpeti · 2024-02-11

It's in the technical reference manual, nothing exotic...Chapter 6 "PWR"

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About FAQ: STM32H7 SRAM/Backup SRAM content is not preserved after reset

STM32H7 PDR_ON signal

Clarify stack management on STM32H7 / cortex M7

Clarifications about STM32H7 interrupts group priorities and subpriorities

Bit SCUEN of PWR peripheral of STM32H7

Re: About FAQ: STM32H7 SRAM/Backup SRAM content is not preserved after reset

Re: About FAQ: STM32H7 SRAM/Backup SRAM content is not preserved after reset

Re: About FAQ: STM32H7 SRAM/Backup SRAM content is not preserved after reset

Re: Clarifications about STM32H7 interrupts group priorities and subpriorities

Re: Bit SCUEN of PWR peripheral of STM32H7