About bramble

bramble · 2025-02-16

Hi All,I have a problem on H755 Nucleo which is that the M4's tick doesn't seem to be advancing.Digging a little deeper I can see that uwTickFreq is zero, but I can't see why that's happened. There must be something wrong in my .ioc file since I've h...

bramble · 2025-02-13

Hi folks,I have SDMMC1 working on CM7 on my H755 Nucleo. Now I want to migrate FAT-FS and the uSD to CM4, in which case I think I should switch to the SDMMC2 peripheral since it's in D2 domain along with CM4.I have a some questions about this and wou...

bramble · 2025-02-07

Hi,I've been trying to get a MicroSD card working with my H755 Nucleo for the last week. Tricky, isn't it?!I started with a SPI SD-card interface but gave up on that after about several days of pain. My focus now is on interfacing via SDIO, using the...

bramble · 2025-01-31

Hi,I'm using the CMSIS-DSP library for FFT calculation, using build-time configurable FFT lengths in the range 64 - 1024. The CMSIS-DSP documentation recommends that, when the FFT length is known, using an appropriate initialisation function such as ...

bramble · 2025-01-09

Hi, According to mb1363 for the H755 Nucleo, in order to change from the default SMPS to internal LDO supply, to enable 480 MHz clock, I need to change C54/C58 from 100 nF to 2.2 uF. However it appears that there are no capacitors installed on my boa...

bramble · 2025-02-16

Further update, a look at the CM7.list file reveals where the problem arises:Clearly the HSEM is using address 0x30004000, which is where CM4 has been told it can start using SRAM1, and CM7 as been told that it can't access any more than 16 kB runnin...

bramble · 2025-02-16

Hi @TDK , ah - good point! I'm single stepping though, in fact the LEDs aren't enabled on M4, so that's a bit of rotten code, sorry to say.I think I've confirmed that my ADCs on M7 are trampling over M4's memory though. I saw that uwTickFreq was zer...

bramble · 2025-02-16

Hi @TDK ,Thank you for your advice. I'm calling from a very simple RTOS task - I originally saw this issue in my SDMMC driver on M4, where I suspected a problem with priorities. However I've stripped out that code and gone back to a much simpler way ...

bramble · 2025-02-15

Hi @Khouloud OTHMAN , a lot of people have asked the same question about the way that AN5200 mentions explanation of the MDMA configuration, but there's nothing provided other than a screenshot showing the start of this procedure. Please can this be ...

bramble · 2025-02-08

Hi @dharanik_1399 , I ran into the same problem very recently (on STM32H755). There could be several reasons for the problem you report but I suggest that you check this: https://community.st.com/t5/stm32-mcus-embedded-software/sdcard-with-sdmmc-on-s...

User statistics

User Activity

STM32H755 CM4's HAL_Delay() never returns

SDMMC2 on STM32H755 Nucleo PB14 Reserved

SDCard with SDMMC on STM32H755ZI Nucleo

ARM CMSIS-DSP arm_rfft_init_<len>_q15 for FFT initialisation

C54/C58 For LDO Supply on NUCLEO-H755

Re: STM32H755 CM4's HAL_Delay() never returns

Re: STM32H755 CM4's HAL_Delay() never returns

Re: STM32H755 CM4's HAL_Delay() never returns

Re: [STM32H7] How to use SDMMC with MDMA

Re: Error mounting SD Card in 4-bit mode in stm32f756zg