nrf_sdh_enable_request() takes 500 ms

[John]

Using SDK 15.2.0, s132, nRF52-DK.

The logging facility in Segger Embedded Studio tells me that the call to nrf_sdh_enable_request() takes about 500 ms.  I have an interrupt-driven sensor, and it appears that interrupts are blocked during this time.  Searching indicated that switching the LF clock to RC would reduce this time, but it had no effect.

Is there any way to reduce this time, or to have other code running during the 500 ms?

[Susheel Nuguru]

Hi,

It looks like you were using XTAL (assuming, since this info is missing in the description) when nrf_sdh_enable_request is taking too long to finish. Are you measuring this in debug mode? Which NRF device version is it?, is there any way I can reproduce this on the DK?

[John]

I've worked around this by starting the LF oscillator manually before starting BLE.