Why does each example project contain blank/mbr/slxxx folders?

[cpeng]

Hi i'm very new in using Nordic nRF52840. Got 2 questions:

1.Why does each example project contain blank/mbr/slxxx folders? in these folders they all have a copy of the same project.

Does that mean the project in blank does not contain an mbr? if so how does the code boot on DK?

2. In segger, there's solution hierachy and there's project hierachy. What are the relationships between "solution' and "project"? Why the right-click options show differenct settings when you clicked on "solution" vs "projects"?

For example the section placement macros are blank if you right clicked options on "solutions",  but when you right clicked options on "project" hierachy it's poplutated with the following settings:

FLASH_PH_START=0x0

FLASH_PH_SIZE=0x100000

RAM_PH_START=0x20000000

RAM_PH_SIZE=0x40000

FLASH_START=0xec000

FLASH_SIZE=0x12000

RAM_START=0x20000008

RAM_SIZE=0x3fff8

3. the options page contain 'common', 'release' and 'debug'. what are they and why are they grouped under "public configurations" and "private configurations"?

Thanks.

[Amanda Hsieh]

Hi, 

Q1.  Why does each example project contain blank/mbr/slxxx folders? in these folders they all have a copy of the same project. Does that mean the project in blank does not contain an mbr? if so how does the code boot on DK?

A: The MBR - Master Boot Record is used to allow safe update of bootloader on the chip. The MBR is included on the nRF52840 Dongle, as this device contains a bootloader to allow programming applications through the USB port. Please see this tutorial for more details. Blank directory is used for devices that does not require a MBR/bootloader, for instance the nRF52 DK and nRF52840 DK. BLE examples require a softdevice, and the directories will be named s1xx/s2xx/s3xx, depending on which chip is used and which protocols are supported in the example.

Q2. In segger, there's solution hierachy and there's project hierachy. What are the relationships between "solution' and "project"? Why the right-click options show differenct settings when you clicked on "solution" vs "projects"?

A: Please see https://studio.segger.com/index.htm?https://studio.segger.com/ide_project_system_overview.htm

Q3. the options page contain 'common', 'release' and 'debug'. what are they and why are they grouped under "public configurations" and "private configurations"?

A: Please see https://studio.segger.com/index.htm?https://studio.segger.com/ide_project_configurations_and_property_values.htm

If you have further questions regarding Segger, please request support on https://forum.segger.com/

-Amanda H.