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Sonsivri > Electronics > General Electronics (Moderators: o2, pickit2) > how to unlock the chip
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lynee
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« on: April 10, 2023, 09:42:16 09:42 »
hello,

we used STM32F407VET6 to design circuit,
in the process of burning program,
the computer can connect to the board but fail to burn it by st link,
then we detected the chip and found it is locked.
so how can i deal with it?
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rtm
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a.k.a. klug
« Reply #1 on: April 10, 2023, 11:10:01 11:10 »
Seems, your stm32 chip is locking itself when its program is started. You need to connect while the chip is not running. Use "Connect under reset" option of ST-Link for this.
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lynee
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« Reply #2 on: April 10, 2023, 02:16:20 14:16 »
tks, i will try.
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