STM32 MCUs Products

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STM32U5 + HAL_FLASH_Program() + DCACHE?

Hi,I am currently developing a small application with a STM32U5 where I write a few bytes into flash using HAL_FLASH_Program(). All seems to work fine. Except I can only read the data back after I do a reset. I suspect that DCACHE is playing a trick ...

JE by Associate III
  • 740 Views
  • 6 replies
  • 0 kudos

DCMI priority versus SDMMC (STM32N6)

Good day folks,I have the DCMI camera interface on a STM32N6 streaming to the SDCard, and I am noticing that there are cases that the DCMI reports an Overrun when a SD access occurs at the same time that the Hsync interrupt was meant to occur.Digging...

cam-sdaccess.png
exarian by Associate III
  • 291 Views
  • 4 replies
  • 3 kudos

Resolved! STM32N655 BKPSRAM

Hello,In my project, I want to hold boot params in BKPSRAM so "Application project" can also write and read this section easily. If boot is needed, "Application project" will set boot params as required and after that it will use "NVIC_System_Reset"....

B.Kaya by Associate III
  • 927 Views
  • 5 replies
  • 0 kudos

Resolved! STM32H573V UCPD CC2 and PC9 interference

HI,I am working on a board using STM32H573V and have a working solution with UCPD detecting an inserted memory stick and running the MSC class. In an other part of the software I am using PC9 as an GPIO push-pull, low speed output and as soon as I se...

DirkH by Associate II
  • 607 Views
  • 4 replies
  • 4 kudos

Resolved! STM32H7 HSE not starting on some boards

Hello all,I've designed a board around a STM32H743 (LQFP-100) and am running into the following issue.On 2 boards out of 10, the HSE seems not to start properly. The HSE_RDY flag is never set after enabling HSE. I have checked it's not in bypass mode...

OpusOne by Associate III
  • 1054 Views
  • 20 replies
  • 3 kudos

Resolved! Question on VDD and VSS internal connection

Should each vdd pin of the stm32f407zgt6 read continuity like the blue pill on multimeter, are they internally connected within the chip or separated? Similary for all the vss pins are they also all connected vss inside stm32f407zgt6 Thanks

Resolved! OBD2 request frames rejection issues

I tried doing an OBD2 request via Car's OBD2 port.I am able to see the CAN BUS traffic using an oscilloscope , just my request frames are rejected by car. I am using STM32h735G-DK development board to send OBD2 requests. It consists of an inbuilt FDC...

MR17 by Associate II
  • 1375 Views
  • 20 replies
  • 10 kudos

STM32N6 timer misbehaviour on TIMPRE>=4

There is something strange happening with STM32N657x0HxQ MCU when HAL tick timer is not using SysTick, but a timer like TIM6, and TIMPRE is changed to 4 or 8 while timer is active. Observed it on DK and custom board.I created isolated test code with ...

timpre.png timpre_debug.png

Document error: RM0090 Rev 21

Hello,Document: RM0090 Reference Manual for STM32F405/415, STM32F407/417, STM32F427/437 andSTM32F429/439.https://www.st.com/resource/en/reference_manual/rm0090-stm32f405415-stm32f407417-stm32f427437-and-stm32f429439-advanced-armbased-32bit-mcus-stmic...