Hallo Chris,

On 21/03/2020 07:45, Sebastian Huber wrote:

On 20/03/2020 22:23, Chris Johns wrote:


On 20 Mar 2020, at 4:49 pm, Sebastian Huber <sebastian.hu...@embedded-brains.de> wrote:

On 20/03/2020 05:15, Chris Johns wrote:

On 19/3/20 7:52 pm, Sebastian Huber wrote:
The ARMv7-M architecture has no CP-15.  The inline assembly for the
CP-15 access leads to assembler errors if compiled with -O0.
I would like to understand this one in detail to see why there is cp15 in the 
build.
In ARMv7-M the system registers are memory mapped.

If I compile a Cortex-M based BSP with -O0, then I get:

BSP?
For example the atsamv BSP.
could you please have a look at this. Being able to build with -O0 is quite helpful during BSP development.
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