STM32 MCUs Embedded software

Why would FLASH_FLAG_PGPERR and FLASH_FLAG_PGSERR be set after a successful flash write, and at power-up before any flash write operations?

I've written a flash-based bootloader for the STM32F4 using the latest STM32CubeMX tool and its HAL libraries. I've avoided all the usual pitfalls (it's not my first bootloader), and my code works reliably. I'm not erasing my bootloader segment, writ...

Resolved! CFGBSY bit of FLASH SR register is SR is set it is not reset again in stm32g0b1cet6 controller #stm32g0 series

Hi everyone,i am using the stm32g0b1cet6 controller. in which I am working with flash memory. I am using the FLASH_WaitForLastOperation function. In that function, one flash SR register's CFGBSY bit is not reset, and due to that all other flash write...

Resolved! What is the best and easy way to verify a firmware in FOTA?

I am almost running out of limitations in my STM32L0 MCU as flash is divided into three sections.bootloader+user application+ota firmware. I have implemented a successful OTA at the moment. I am verifying the size of the OTA but I need to know if the...

Resolved! Erasing flash during RTOS task execution on STM32F4

Hi .. I am using this function to erase some sectors on the flash bool FLASH_EraseSectors(uint32_t starting_sector , uint8_t number_of_sectors) { FLASH_EraseInitTypeDef erase_init; uint32_t page_error; /* Erase the user Flash area */ erase_...

Resolved! How to read/write to STM32L071B flash memory using LL/Registers ?

Hello, I am trying to find LL functions parallel to those in HAL library that support Flash programming and it looks like there is not support in LL for r/w flash. As HAL library is not an option for me, I am wondering if it is possible <writing dire...

Resolved! flash_erase error: can not erase certain flash pages without error, however it is possible while debugging and stepping into every function

Hello,I am currently writing a program that will delete the bootloader, which is stored in 24 flash pages (Bootloader begins at 0x08000000, the program itself begins at 0x800C000).Pages 1-11 & 13-23 can be easily erased. Now the problem is, the page ...

L4 Flash erase issue

MCU is STM32L4R9 with 1MB. I'm having trouble getting the device to erase the upper half of the flash programmatically. Apparently the device ships with opt bytes set for dual bank.I connected the device to the STM32 programmer through USB and turn...

HAL_RCC_OscConfig function takes too much space

Posted on November 15, 2017 at 11:09Hello After I face some fitting to flash problem I saw my largest function is HAL_RCC_OscConfig.I thouht a function that writes static variables to registers should be smaller. Am I doing something wrong or is the...

Resolved! First write to Flash using EEPROM Emulator fails.

I am adding EEPROM emulation using the x-cube-eeprom package. On program startup I am calling EE_Init and I have traced the code through the checks for the flash to be used being erased, which it is. However, when the first element is written, the fl...

Place const at specific flash location

Hi everyone,I am developing a custom bootloader and before flash the new application image, the bootloader must ensure that the image corresponds to the board, so I think a simple way to do it is to store a specific value (constant uint32_t) into a s...