Solved Stm32f407 Wrong Flash Values Stmicroelectronics Community

By switzerlandersing On Sep 12, 2025

Solved: STM32F407 Wrong Flash Values - STMicroelectronics Community

Solved: STM32F407 Wrong Flash Values - STMicroelectronics Community Solved: hello, i have an issue with some stm32f407vg chips. values stored in flash are wrong, e.g. flash size at address 0x1fff7a22 is 0xffff instead. This article explores common problems encountered with the stm32f407igt6 bootloader and flashing process, providing step by step troubleshooting solutions to help developers fix and prevent these issues.

Solved: My STM32G473 Has Wrong Flash Size? How Do I Deal W... - STMicroelectronics Community

Solved: My STM32G473 Has Wrong Flash Size? How Do I Deal W... - STMicroelectronics Community I´m trying to save some data to flash memory on my stm32f407 board. before i can save them, i need to erase a memory sector. i chose 16 kbytes sector1 starting with address 0x08004000 and chose voltage range 2.1 2.7 v. i'm using hal library. Many developers and engineers face this issue when working with stm32 microcontrollers. this article dives into the common causes of boot issues, how to diagnose them, and practical steps you can take to get your board running again. The closest is their comments: any attempt to read the flash memory on stm32f4xx while it is being written or erased, causes the bus to stall. read operations are processed correctly once the program operation has completed. this means that code or data fetches cannot be performed while a write/erase operation is ongoing. It's a hardware limitation built on design choices. you'll need to live with it and adapt. use some of the 16kb sectors for storage, perhaps journalling to save time and wear from erase cycles. tips, buy me a coffee, or three paypal venmo. up vote any posts that you find helpful, it shows what's working 2024 06 24 10:43 pm.

STM32H733: Commissioning Of Flash Ends In Error. W... - STMicroelectronics Community

STM32H733: Commissioning Of Flash Ends In Error. W... - STMicroelectronics Community The closest is their comments: any attempt to read the flash memory on stm32f4xx while it is being written or erased, causes the bus to stall. read operations are processed correctly once the program operation has completed. this means that code or data fetches cannot be performed while a write/erase operation is ongoing. It's a hardware limitation built on design choices. you'll need to live with it and adapt. use some of the 16kb sectors for storage, perhaps journalling to save time and wear from erase cycles. tips, buy me a coffee, or three paypal venmo. up vote any posts that you find helpful, it shows what's working 2024 06 24 10:43 pm. When this happens, the pgperr (programming parallelism error trying to write the wrong width to flash) flag gets set in the flash status register. that's a flag i'd expect to go off every time if there was in fact a width mismatch, but it only happens occasionally!. During some maintenance operations, we need to save some configuration parameters in flash memory. even if we use the 16 kb sector, the erase time is greater than 2 ms and the iwdg make the mcu reset. To write to flash, you must unlock the flash, ensure the location you're writing to is erased, and then write the value. additionally, on the stm32g4 series, you must write 64 bits at a time, aligned. Posted on february 27, 2017 at 17:11 rm0410, rev.2 defines 0xf0ffaafd as default value for flash optcr. table 3.7.8 has a value of 0xffffaafd. this value does make more sense. please correct, if not yet already done.

Stm32f407 Dfu Bootloader Not Working And Got Wrong... - STMicroelectronics Community

Stm32f407 Dfu Bootloader Not Working And Got Wrong... - STMicroelectronics Community When this happens, the pgperr (programming parallelism error trying to write the wrong width to flash) flag gets set in the flash status register. that's a flag i'd expect to go off every time if there was in fact a width mismatch, but it only happens occasionally!. During some maintenance operations, we need to save some configuration parameters in flash memory. even if we use the 16 kb sector, the erase time is greater than 2 ms and the iwdg make the mcu reset. To write to flash, you must unlock the flash, ensure the location you're writing to is erased, and then write the value. additionally, on the stm32g4 series, you must write 64 bits at a time, aligned. Posted on february 27, 2017 at 17:11 rm0410, rev.2 defines 0xf0ffaafd as default value for flash optcr. table 3.7.8 has a value of 0xffffaafd. this value does make more sense. please correct, if not yet already done.