nRF52832 MPU TEX,S,B,C bits setup

[tkorsdal]

I am having problems getting the memory protection to work.

I have not found a clear definition on how to configure the TEX,S,C & B bits for the various memory regions in the nRF52832.

Anyone with sample code or information on this?

[tkorsdal]

The problem was incorrect setting of the size field.

For TEX,S,B and C bits I went with the suggestions in section B3.1 of the ARMv7-M architecture reference manual:

Code regions as WT (Write through) (TEX,S,B,C)=(110,1,1,0) RAM Data regions as WBWA (Write-back, write-allocate). (TEX,S,B,C)=(101,1,0,1)