Stack pointer is setup to incorrect alignment (STM32)
Technical Note 82023
Architectures:
ARM
Component:
debugger
Updated:
2015/11/6 11:10
Introduction
Programming an STM32 device fails with the message:
Warning: Stack pointer is setup to incorrect alignment. Stack addr=0xAAAAAAAA
Background
STM32 devices can be read protected. When read protection is enabled, bytes in flash memory will be read out as 0xAA
. When the Cortex-M device starts up, the bytes at 0x00
to 0x03
are read, as they hold the value of the stack pointer, and in that situation the value 0xAAAAAAAA
is regarded as invalid.
Solution
The flash of the STM32 device needs to be erased. With I-jet, unlock utilities for STM32 devices are provided as C-SPY macros found in the C-SPY Macro Quicklaunch window. With J-Link, arm\bin\JLinkSTM32.exe
can be used.
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