MCUboot DIRECT_XIP

Question

Hi, 
 I was able to get the DFU system working by CONFIG_BOOTLOADER_MCUBOOT =y. I notice that the default mcuboot update methode is using the scratch partition. According to the documentation of MCUboot, an alternative is direct-xip mode. The problem of flashing the image into the right (not used) slot is been taken care of. How do I select the direct-xip mode? I tried setting 
 
 CONFIG_BOOT_BUILD_DIRECT_XIP_VARIANT in the prj.conf file of my sample application, but with CONFIG_BOOTLOADER_MCUBOOT=y and CONFIG_BOOT_BUILD_DIRECT_XIP_VARIANT=y, the application will not build. Do I need to re-build the bootloader itself with some setting to use direct-xip mode?

BvdP4Celsius · Answer

Thanks Sigurd, this seems to do the trick! 
 b.t.w., I ignored the error: 
 CMake Warning (dev) at ....\build_1\image_preload.cmake:8 (set): Syntax error in cmake code at ....\build_1\image_preload.cmake:8 when parsing string ...	oolchains\v2.0.0\opt\bin\python.exe Invalid escape sequence \U Policy CMP0010 is not set: Bad variable reference syntax is an error. Run "cmake --help-policy CMP0010" for policy details. Use the cmake_policy command to set the policy and suppress this warning. This warning is for project developers. Use -Wno-dev to suppress it.