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Cortex M4 - Access Level

Hello,

In one of the arm cortex m4 processor based microcontroller, I've changed the access level to unprivilege, then when tried to access DEMCR, processor throwing exception.

I checked in arm cortex m4 user guide, there is no info related to DEMCR and its access level.

Then how to determine this register access level ?

Top replies

Ronan Synnott over 1 year ago +3 verified

Hello, All registers in the System Control Space (SCS), including the debug registers, can only be accessed in privileged state. https://developer.arm.com/documentation/ddi0403/d/System-Level-Architecture...
Sudhu145 over 1 year ago in reply to Ronan Synnott +3

Thanks for your reply, it really helped...
Annie over 1 year ago +1

Hi there, I have moved your question to the Architectures and Processors forum. Many thanks.

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0 Sudhu145 over 1 year ago in reply to Ronan Synnott

Thanks for your reply, it really helped...
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0 Sudhu145 over 1 year ago in reply to Ronan Synnott

Thanks for your reply, it really helped...
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