RE: POF configuration when using soft device

Susheel Nuguru — Wed, 04 Jul 2018 07:21:17 GMT

Yes, latest softdevice versions supports it, so modifying library that uses softdevice API should support more values.

RE: POF configuration when using soft device

Lior Smila — Wed, 04 Jul 2018 05:36:52 GMT

Thanks, I saw that in the code, yet is this an official answer from Nordic? can I be positive that those values are supported?

In the code you can fine this note:

/* Currently when SD is enabled - the configuration can be changed
         * in very limited range.
         * It is the SoftDevice limitation.
         */

???

Regards,

Lior.

RE: POF configuration when using soft device

Susheel Nuguru — Tue, 03 Jul 2018 19:23:37 GMT

It looks like the underlying softdevice call sd_power_pof_threshold_set supports all the below thresholds as mentioned in nrf_soc.h file

/**@brief Power failure thresholds */
enum NRF_POWER_THRESHOLDS
{
  NRF_POWER_THRESHOLD_V17 = 4UL, /**< 1.7 Volts power failure threshold. */
  NRF_POWER_THRESHOLD_V18,       /**< 1.8 Volts power failure threshold. */
  NRF_POWER_THRESHOLD_V19,       /**< 1.9 Volts power failure threshold. */
  NRF_POWER_THRESHOLD_V20,       /**< 2.0 Volts power failure threshold. */
  NRF_POWER_THRESHOLD_V21,       /**< 2.1 Volts power failure threshold. */
  NRF_POWER_THRESHOLD_V22,       /**< 2.2 Volts power failure threshold. */
  NRF_POWER_THRESHOLD_V23,       /**< 2.3 Volts power failure threshold. */
  NRF_POWER_THRESHOLD_V24,       /**< 2.4 Volts power failure threshold. */
  NRF_POWER_THRESHOLD_V25,       /**< 2.5 Volts power failure threshold. */
  NRF_POWER_THRESHOLD_V26,       /**< 2.6 Volts power failure threshold. */
  NRF_POWER_THRESHOLD_V27,       /**< 2.7 Volts power failure threshold. */
  NRF_POWER_THRESHOLD_V28        /**< 2.8 Volts power failure threshold. */
};

So this can only mean that nrf_drv_power_pof_init has not implemented the rest of the thresholds. You can add them yourself as the thresholds are already defined in nrf_power.h file. It is just the matter of you extending the switch cases in the function nrf_drv_power_pof_init