Disabling Softdevice stops the sampling of saadc

RE: Disabling Softdevice stops the sampling of saadc

AIRAM — Tue, 19 Sep 2023 06:09:24 GMT

Do you mean that you get the error when running debugging, without setting any breakpoints?

yes,

For the time being I just left it because in normal running it doesn't create a problem and we will be running this normally without debugger

RE: Disabling Softdevice stops the sampling of saadc

Jørgen Holmefjord — Mon, 18 Sep 2023 10:36:37 GMT

This code is part of the SoftDevice Handler library, where events are polled from the SoftDevice. There should not be any error codes generated by this.

Do you have the logger module in your application? Can you see any error codes on UART/RTT logger?

[quote userid="124874" url="~/f/nordic-q-a/103704/disabling-softdevice-stops-the-sampling-of-saadc/446330"] i have not set any breakpoints in my code[/quote]

Do you mean that you get the error when running debugging, without setting any breakpoints?

RE: Disabling Softdevice stops the sampling of saadc

AIRAM — Fri, 15 Sep 2023 14:54:08 GMT

Hi Jørgen Holmefjord in this part of code error is shown and i have not set any breakpoints in my code

RE: Disabling Softdevice stops the sampling of saadc

Jørgen Holmefjord — Fri, 15 Sep 2023 12:01:03 GMT

Hi,

Can you check the output on the logger? This should indicate the location and error code of the failure (you might have to build the application in "Debug" configuration if you are not doing this already).

[quote user="Maryamaria"]And this behavior is seen while debugging only.[/quote]

Do you set any breakpoints or similar in the application when debugging? Note that while the softdevice is enabled, it is not possible to resume execution from a breakpoint, as stopping at a breakpoint will halt the CPU and mess up the timing of the softdevice operations.

Best regards,
Jørgen

RE: Disabling Softdevice stops the sampling of saadc

AIRAM — Thu, 14 Sep 2023 06:45:03 GMT

Hi Jørgen Holmefjord

Thank you for your assistance so far; it has been helpful.

However, I'm encountering an issue when attempting to reinitialize the soft device only sometimes. Could you please review the relevant portion of my code to ensure that it adequately handles the soft device reinitialization process, restarting advertising, and enabling reconnection to the mobile application?

And this behavior is seen while debugging only.

......

ble_stack_init();
uint32_t err_code = ble_advertising_start(&m_advertising, BLE_ADV_MODE_FAST);
APP_ERROR_CHECK(err_code);
// Register a handler for BLE events.
NRF_SDH_BLE_OBSERVER(m_ble_observer, APP_BLE_OBSERVER_PRIO, ble_evt_handler, NULL);
uint16_t len = sprintf(data, "0C11");
ble_nus_data_send(&m_nus, data, &len, m_conn_handle);

RE: Disabling Softdevice stops the sampling of saadc

Jørgen Holmefjord — Wed, 13 Sep 2023 17:09:35 GMT

Simply make sure you call the following before ble_stack_init() in the start of your main():

ret_code_t err_code = nrf_drv_clock_init();
APP_ERROR_CHECK(err_code);
nrf_drv_clock_lfclk_request(NULL);

You can find more details about how to integrate and configure the clock driver in your application in the nRF5 SDK Application Timer Tutorial.

RE: Disabling Softdevice stops the sampling of saadc

AIRAM — Wed, 13 Sep 2023 16:58:43 GMT

Hi Jorgen,

Thank you

Can you please let me an example with such functionality or any helping material through which i can implement this in my code

RE: Disabling Softdevice stops the sampling of saadc

Jørgen Holmefjord — Wed, 13 Sep 2023 13:42:25 GMT

Hi,

When the SoftDevice is enabled, the LFCLK will be turned on all the time. The LFCLK is also required for the RTC/app_timer used in your application to run. If you do not explicitly start the LFCLK in your application after disabling the SoftDevice, any RTC based timers will stop running.

This can be resolved by using the clock driver to request the LFCLK before enabling the SoftDevice the first time, using the nrf_drv_clock_lfclk_request() API. The clock driver should then make sure that the LFCLK keeps running if the SoftDevice is disabled.

Best regards,
Jørgen