STM32F4 bootloader write

[ralf239955_st]

Posted on February 11, 2013 at 08:52

Hi all,

up to now I  used a MSWindows bootloader application (based on Dale Wheats code) for the STM32F1. Now I also use the STM32F4. I updated the bootloader due to the different erase commands (erase vs. extended erase). Now I can identify and erase the STM32. But if I want to write to the flash by issuing the 'Write Memory Command' (0x31) I always get back NACK. Read/write protection is disabled. It would be great I someone could point me in the right direction. Best regards Tom   #stm32f4-bootloader

[pradeepa]

Posted on September 09, 2013 at 09:01

Clive1, 

Is there an application note which has bootloader commands documented? I cannot find any.Thank you.I found the Application note. Sorry for the trouble. The application notes were mentioned in the AN2606.

[daekmoon32]

Posted on November 01, 2013 at 09:57

Hello clive1,

im having same issue as Tom. I noticed that the flash is erased after full erase command, but if i want write some data, i receive NACK. Is possible to write to memmory after mass erase or I have to restart board?? thank you for reply

[Tesla DeLorean]

Posted on November 01, 2013 at 15:59

Is possible to write to memory after mass erase or I have to restart board??

Depends, in normal operation yes, you can write to memory after doing a mass erase, the erase takes quite a while to complete. You may well need to restart if you have read protection enabled, as this state is latched in the part, and observed by the system loader.