I am trying to program a stm32l451cet6 microcontroller. My code works perfectly fine for 5-6 debug sessions. After a few debug sessions, this warning pops up with a different address for every hardware I use.When this break at address pops up, my code stops working. I tried debugging and found there was no break point at any line of the code. Why is this break even popping up?

You're in the system memory. Few possibilities:Is BOOT0 tied low?Is the vector table set correctly (look at SCB->VTOR)

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Break at address "0x1fff2f1e" with no debug information available

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I am trying to program a stm32l451cet6 microcontroller. My code works perfectly fine for 5-6 debug sessions. After a few debug sessions, this warning pops up with a different address for every hardware I use. Screenshot 2025-01-28 190427.png

When this break at address pops up, my code stops working. I tried debugging and found there was no break point at any line of the code. Why is this break even popping up?

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Tesla DeLoreanBest answer

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It can start in ROM if the FLASH is erased at some point in the reset, startup and erase cycle.

BOOT0 = LOW should be adequate to start viable FLASH code at power up.

Make sure SCB->VTOR points at the FLASH vector table, should be handled in SystemInit()

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TDK

You're in the system memory. Few possibilities:

Is BOOT0 tied low?
Is the vector table set correctly (look at SCB->VTOR)

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A

Akshat-hu-vroAuthor

Associate II

The BOOT0 pin is connected to GND. Is this a problem? Should I connect it to VCC or leave it hanging?

TDK

BOOT0 should be grounded or pulled to ground.