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STM32L476QE Flash write and Erase API

Question asked by devKhan on Sep 10, 2015
Latest reply on Sep 23, 2015 by Clive One
We are using STM32LL476QE and as per reference manual , While executing a program code from bank 1, it is possible to perform a program operation on the bank 2.
Here we are into situation in which Our custom Bootloader will be executing from BANK1 and will be writing Application Binary on BANK1 itself at the time of update, will that work or we need to execute flash program and erase API's from RAM?
We are using GNU ARM tool-chain from
Can you please suggest some robust method to do this ?