Hi Ralph, Thanks for taking the time to respond. However I am not clear how based on the build o/p that I can separate the Application hex file or just generate a hex file that contains only the application from the resulting build. Are there any compile options or any build options so I can control the resulting build o/p?

Thanks, Yogesh

Hi Ralph,

I saw this piece of configuration that you can add to the target overrides, in mbed_app.json file. I am building my application and the version of the mbed os is 5.85. By adding this can I ensure the build doesn't contain the softdevice in the resulting build? However I get a compilation error cannot parse mbed_app.json file. Any thoughts?

{ "target_overrides": { "*": { "target.bootloader_img": null } } }

Thanks, Ajay

Hi Ajay,

Thanks for re-wording your question. We now understand that you are simply trying to remove the softdevice from the build - is that correct? To do this, you are on the right trail. In the mbed_app.json file you will want to remove the softdevice COMMON and FULL references and add one defined NONE. Please try this in your file:

{
    "target_overrides": {
        "NRF52_DK": {
            "target.extra_labels_remove": ["SOFTDEVICE_COMMON", "SOFTDEVICE_S132_FULL"],
            "target.extra_labels_add": ["SOFTDEVICE_NONE"]
        },
        "NRF52840_DK": {
            "target.extra_labels_remove": ["SOFTDEVICE_COMMON", "SOFTDEVICE_S140_FULL"],
            "target.extra_labels_add": ["SOFTDEVICE_NONE"]
        }
    }
}

We've included both Nordic DK targets as the softdevices are different. You should now see a single hex file generated in the BUILD folder.

This is documened in the readme here:

• https://github.com/ARMmbed/mbed-os/tree/master/targets/TARGET_NORDIC/TARGET_NRF5x

Hi Ralph, Does this target_overrides work with mbed os 5.8.5. Even though I have the mbed_app.json included in the root folder, yet the softdevice is included in the build.

Elf2Bin: mOrsatFuelTankSensor-5.8.5 [DEBUG] FromELF: arm-none-eabi-objcopy -O ihex .\BUILD\NRF52_DK\GCC_ARM\mOrsatFuelTankSensor-5.8.5.elf .\BUILD\NRF52_DK\GCC_ARM\mOrsatFuelTankSensor-5.8.5.hex [DEBUG] Return: 0 [DEBUG] SoftDevice file found s132_nrf52_2.0.0_softdevice.hex. [DEBUG] Merge SoftDevice file s132_nrf52_2.0.0_softdevice.hex +-------+--+-+-+

+-------+--+-+-+

+-------+--+-+-+ Total Static RAM memory (data + bss): 13152 bytes Total Flash memory (text + data): 140150 bytes

Thanks, Ajay

Hi Ralph, Thanks for your inputs. I figured it out. The changes you mentioned is relevant from 5.9.x and so for versions prior to that i had to update the targets.json to prevent the softdevice from being merged into the resulting build.

Thanks, Ajay