STM32 F7 HAL_FLASH_Program() on sector 0

mailmail9114 · ‎2016-08-24

Posted on August 24, 2016 at 11:20

hi,

ive problems to write some flash areas.

using HAL_FLASH_Program() at higher sectors is working correctly. but if i want to

write at the end of flash sector 0 it doesnt work. the value value is still 0xFFFF FFFF after writing. the program code is only using about the first 50% of sector 0.

i checked the FLASH_OPTCR register nWRP[7:0] bits - all value 1

HAL_FLASH_Unlock(); is also done before writing to flash.

thanks for help

slimen · ‎2016-08-24

Posted on August 24, 2016 at 13:15

Hi,

May be you can check if bootloader is used for section 0.

Regards

mailmail9114 · ‎2016-08-24

Posted on August 24, 2016 at 14:34

Hi,

i dont use any bootloader :

MEMORY

{

FLASH (rx) : ORIGIN = 0x08000000, LENGTH = 1024K

RAM (xrw) : ORIGIN = 0x20000000, LENGTH = 320K

}

regards

mailmail9114 · ‎2016-08-30

Posted on August 30, 2016 at 15:25

any ideas?

thanks!

waclawek.jan · ‎2016-08-30

Posted on August 30, 2016 at 15:34

Without attempting to gain real understanding: caching issue?

JW

mailmail9114 · ‎2016-09-06

Posted on September 06, 2016 at 09:36

Hi,

Problem was caused by Segger j-link .

Debugging with ST Link works as excepted.

regards