This single processor demo application shows how to do the TrustZone Partitioning. It is split into a secure and non-secure part. Using CMSIS-Zone, it generates:

A header file that contains #defines to control the various linker scatter files (and might be used in other parts of the application).
The SystemIsolation_Config.c header file that contains memory protection controller (MPC) and peripheral protection controller (PPC) and related interrupt setup.
The partition_gen.h header file that contains the secure attribution unit (SAU) setup and the NVIC configuration for secure/non-secure.

The application itself shows how to implement calls between the secure and the non-secure part.

Using the CMSIS-Zone project

Import the project "Examples\SAML11\Zone" into the CMSIS-Zone utility
Open the SAML11.azone file
Generate the related output files

The SAML11.azone file of that project has the following configuration settings:

Added the zones sApp and nsApp
Created the memory regions APP_NS, APP_S, APP_NSC, DATA_NS, DATA_S, RAM_NS, and RAM_NS
Selected various memory regions and peripherals for using in the different zones:

The zones use different Flash and SRAM regions for code and data. To generate the output, click on the Generate button in the Zone Editor tool bar. This creates the following files in the ftl_gen directory:

Template File	Generated File	Description
dump_fzone.txt.ftl	dump_fzone.txt	Contains the complete model
flash.dbgconf.ftl	flash.dbgconf	Flash algorithm configuration for security settings
flash.dbgconf.lst.ftl	flash.dbgconf.lst	Flash algorithm configuration for security settings
helper.ftlinc	N/A	Helper template file with FTL functions.
scatter_ns.sct.ftl	scatter_ns.sct	Example scatter file for non-secure zone.
scatter_s.sct.ftl	scatter_s.sct	Example scatter file for secure zone.

These files can be used in any IDE to create the final application. In the following, the usage in Arm Keil MDK is described.

Using the MDK project

The example project can be loaded, built and debugged in µVision by performing the following steps:

Navigate to Examples/SAML11/MDK
Open the multi-project workspace NoRTOS.uvmpw
Run the batch build in MDK. Both projects, sApp and nsApp need to be compiled in order.