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mwp · 2024-05-06

Hi all,I'm having issues getting ROP Level 1 setup on an STM32L412.Below is the code which is run pretty soon after every reset.After ROP has been set, and the system reset, ROP always reads back as 0xAA which leads to a boot loop of this function be...

mwp · 2024-01-11

Hello all,I wish to setup the MPU early in my firmware, then prevent changes to the MPU registers until next power-cycle/reboot.Is this possible without having the root secure services? The MCU im using is the STM32H7A3. Thanks in advance.

mwp · 2023-12-18

Greetings,I'm attempting to make use of the tamper backup registers.I am enabling the RTC and have using LSI as the clock source.ROP is not enabled, I am not using the TAMP input pins, and i am debugging via SWD.As it is at the moment, writing a valu...

mwp · 2023-12-17

Hi all, The STM32L412xx and RM0394 are quite clear about current use of the micro when in standby mode with LSI-RTC.One thing the docs are not so clear about is the effect of having combined VBATT and VDD pins on the low pin-count packages. With thes...

mwp · 2023-08-09

Hi all,I would like to blend a ARGB8888 image onto my RGB565 frame buffer. Is this possible?The code I'm currently testing (that does not work) is the following: //configure DMA2D options LL_DMA2D_SetMode(DMA2D, LL_DMA2D_MODE_M2M_BLEND); LL_DMA2D_...

mwp · 2024-05-08

Thank you, that's useful information.

mwp · 2024-01-14

@Pavel A. thanks for the reply. It looks like I have more studying to do.I'm aiming to create a bootloader residing in internal flash that does not allow 3rd party firmware to have any kind of access to the bootloader's firmware. I need to protect ke...

mwp · 2024-01-14

Yes, but is there a way to prevent modifications to MPU registers after initial configuration?

mwp · 2023-12-19

I just found the problem...RTC reg write protection needed to be disabled. >> LL_RTC_DisableWriteProtection(RTC); Thanks everyone for the help!

mwp · 2023-12-19

My application is using a L412KB, and the Nucleo im testing with at the moment is a genuine L412KB Nucleo.The L412KB package has VBAT internally connected to VDD.I do intend to use RTC for periodic wakeup from standby mode (this isn't enabled at the ...

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STM32L4 Read Out Protection setup issues

STM32H7 Prevent MPU re-configuration

STM32L4xx TAMP/BKP register use problems

STM32L412 Standby+RTC battery current use

DMA2D Blend ARGB8888 with RGB565

Re: STM32L4 Read Out Protection setup issues

Re: STM32H7 Prevent MPU re-configuration

Re: STM32H7 Prevent MPU re-configuration

Re: STM32L4xx TAMP/BKP register use problems

Re: STM32L4xx TAMP/BKP register use problems