''active write protected STM32 device detected''

[Merav Stassberg]

Posted on February 14, 2017 at 14:07

Hi, I am working on ST STM32L151VB-A, I burned a loader which already worked for me, and since then I get ''active write protected STM32 device detected'' also on other application that worked fine.

 when I try to connect via J-Link commander I get ''cannot connect to target''.

 as I understand from:

https://community.st.com/external-link.jspa?url=https%3A%2F%2Fwiki.segger.com%2Findex.php%3Ftitle%3DJ-Link_can%2527t_connect_to_the_CPU%3A

''This can have different reasons as for example the application does disable the debug interface, re-configures the debug pins, enters some kind of low-power-mode or the security of the device is activated. In order to prevent such situations during the development process''

is this reversible at all? What can be done?

Thank you!

[danilo239955 · Accepted solution]

Posted on February 15, 2017 at 11:45

Hi,

If pin BOOT0 is not directly connected to GND you can connect it to VCC in order to  change the boot mode (see reference manual).

BR.

Danilo

[Merav Stassberg]

Posted on February 15, 2017 at 14:34

Hi,

It worked!!! thank you so much!

[chill.11]

I meet same question when using STM32F401RET6, using this way and can programming, but this Application don't run. please help it. thanks.