ble_app_cli dies without battery_measurement_init()

[awneil]

If I just comment-out battery_measurement_init() in main():

/**@brief Function for application main entry.
 */
int main(void)

{
    bool erase_bonds;

    core_init();

    buttons_leds_init(&erase_bonds);

    ble_init();

    flashlog_init();

    //battery_measurement_init();            <<<< COMMENTED-OUT!

    APP_ERROR_CHECK(nrf_cli_ble_uart_service_init());

    NRF_LOG_INFO("BLE NUS CLI example started.");

    task_manager_start(idle_task, (void *)erase_bonds);
}

Advertising does not start, I see nothing on the UART CLI, and the RTT log just shows:

rtt_cli:~$ [00:00:00.000,000] <info> stack_guard: Stack Guard (128 bytes): 0x2000E000-0x2000E07F (total stack size: 8192 bytes, usable stack area: 8064 bytes)

[00:00:00.000,000] <info> pwr_mgmt: Init

[00:00:00.000,000] <info> task_manager: Task 0 created (name: 'rtt_cli:~$ ', stack: 0x20003F00-0x200042FF).

With battery_measurement_init() enabled, it all works fine; and the RTT log shows:

rtt_cli:~$ [00:00:00.000,000] <info> stack_guard: Stack Guard (128 bytes): 0x2000E000-0x2000E07F (total stack size: 8192 bytes, usable stack area: 8064 bytes)

rtt_cli:~$ [00:00:00.000,000] <info> pwr_mgmt: Init

rtt_cli:~$ [00:00:00.000,000] <info> task_manager: Task 0 created (name: 'rtt_cli:~$ ', stack: 0x20003F00-0x200042FF).

rtt_cli:~$ [00:00:00.000,000] <info> task_manager: Task 1 created (name: 'uart_cli:~$ ', stack: 0x20004400-0x200047FF).

rtt_cli:~$ [00:00:00.000,000] <info> app: BLE NUS CLI example started.

rtt_cli:~$ [00:00:00.000,000] <info> task_manager: Task 3 created (name: 'Idle Task', stack: 0x20004E00-0x200051FF).

rtt_cli:~$ [00:00:00.007,415] <info> app: Fast advertising.

rtt_cli:~$ 

So why does removing battery_measurement_init() break everything else?

I don't want the battery measurement (it's only a simulation, anyhow) - so what do I need to keep from battery_measurement_init() to make the rest of it work?

[awneil]

OK - found it:

The idle_task() calls battery_measurement_start(), which tries to start the timer created by battery_measurement_init()  - so, if battery_measurement_init() was not called, the timer doesn't exist and, therefore, can't be started.

So disabling the battery reporting requires removing both the battery_measurement_init() call from main() and the battery_measurement_start() call from idle_task().

Then it works.