NRF Connect SDK, build elf with Softdevice

RE: NRF Connect SDK, build elf with Softdevice

rexxdad — Fri, 13 Feb 2026 14:25:57 GMT

or, Qorvo found another way, create a c file for the softdevice binary, compile to obj, with a linker placement label and use the linker script (.ld) to position this label.. builds elf, and produces hex without merghex..

RE: NRF Connect SDK, build elf with Softdevice

rexxdad — Tue, 22 Jul 2025 14:00:44 GMT

So, the net for the original question, use mergehex to merge the hex files and use that to program the device in runtime enviroment.. use debugger the load the elf and softdevice hex while developing under debugger

RE: NRF Connect SDK, build elf with Softdevice

rexxdad — Mon, 21 Jul 2025 16:46:00 GMT

I see

```

// Notify observers about SoftDevice enable request.

nrf_sdh.c

if (sdh_request_observer_notify(NRF_SDH_EVT_ENABLE_REQUEST) == NRF_ERROR_BUSY)

{

// Enable process was stopped.

return NRF_SUCCESS;

}

```

in nrf_sdh_enable_request();

how can it return success, when the observer notify failed?

RE: NRF Connect SDK, build elf with Softdevice

rexxdad — Mon, 21 Jul 2025 16:15:33 GMT

i stepped into nrf_sdh_ble_enable(), and the call to

ret_code_t ret_code = sd_ble_enable(p_app_ram_start);

returns rc=2.

I made the ram usage size extra large

RAM (rwx) : ORIGIN = 0x200054F8, LENGTH = 0x3AB08

no change.

RE: NRF Connect SDK, build elf with Softdevice

rexxdad — Mon, 21 Jul 2025 13:59:21 GMT

rc 2 is

#define NRF_ERROR_SOFTDEVICE_NOT_ENABLED (NRF_ERROR_BASE_NUM + 2) ///< SoftDevice has not been enabled

RE: NRF Connect SDK, build elf with Softdevice

rexxdad — Mon, 21 Jul 2025 13:24:36 GMT

I should have added, using the above startup in Ozone, my application is launched correctly at Reset_Handler, and proceeds to my main function as expected. so whatever the softdevice boot manager invokes did that part correctly

RE: NRF Connect SDK, build elf with Softdevice

rexxdad — Mon, 21 Jul 2025 01:27:25 GMT

I think Softdevice was at lesat initialized at boot,

the Ozone startup gets the info from address 0 in flash

Target.LoadMemory ("/home/sam/Downloads/DW3_QM33_SDK_1.0.2.new/SDK/Firmware/SDK_BSP/Nordic/NORDIC_SDK_17_1_0/components/softdevice/s140/hex/s140_nrf52_7.2.0_softdevice.hex", 0x00000000);
J-Link: Flash download: Bank 0 @ 0x00000000: Skipped. Contents already match
Target.ReadU32 (0x00000000); // returns 0x4, data is 0x20000400
Target.SetReg ("SP", 0x20000400);
Target.ReadU32 (0x00000004); // returns 0x4, data is 0xA81

Target.SetReg ("PC", 0xA81);

the app startup addresses are different(at 0x27000)

RE: NRF Connect SDK, build elf with Softdevice

rexxdad — Sun, 20 Jul 2025 22:14:57 GMT

I havent solved the elf build issue, but using the Ozone startup script I can get both loaded..

now I am trying to figure out what rc=2 means

I copied the startup code from the SDK_BSP/Nordic/NORDIC_SDK_17_1_0/examples/ble_central_and_peripheral/experimental/ble_app_multirole_lesc/main.c

using this layout from the ld file

MEMORY
{
FLASH (rwx) : ORIGIN = 0x00027000, LENGTH = 1M - 156K - 4K - 4K
CALIB_SHA (rw) : ORIGIN = 0x000FE000, LENGTH = 4K
CALIB (rw) : ORIGIN = 0x000FF000, LENGTH = 4K
RAM (rwx) : ORIGIN = 0x20002ae8, LENGTH = 0x3d518
}

```

/**@brief Function for initializing the BLE stack.

* @details Initializes the SoftDevice and the BLE event interrupts.

static void ble_stack_init(void)

{

ret_code_t err_code;

err_code = nrf_sdh_enable_request();

APP_ERROR_CHECK(err_code);

// Configure the BLE stack by using the default settings.

// Fetch the start address of the application RAM.

uint32_t app_ram_base = 0;

err_code = nrf_sdh_ble_default_cfg_set(APP_BLE_CONN_CFG_TAG, &app_ram_base);

// this got the value from the RAM stmt in the ld file.

0x20002AE8

APP_ERROR_CHECK(err_code);

// Enable BLE stack.

err_code = nrf_sdh_ble_enable(&app_ram_base);

APP_ERROR_CHECK(err_code); <---------- (my code below)

// Register a handler for BLE events.

NRF_SDH_BLE_OBSERVER(m_ble_observer, APP_BLE_OBSERVER_PRIO, ble_evt_handler, NULL);

}

```

and get to here

app_ram_base = 0x20002ea8;

err_code = nrf_sdh_ble_enable(&app_ram_base);

APP_ERROR_CHECK(err_code);

and err_code = 2