Detecting presence of nRF52 DC-DC circuitry

[Gordon]

Hi,

I'm developing some firmware that will hopefully run on a few different kinds of nRF52 device.

Is there a way of detecting if the DC-DC converter's inductor/capacitor is present when my software is initialising, so that I can call sd_power_dcdc_mode_set(NRF_POWER_DCDC_ENABLE) if it is?

Something like:

DCDCEN=1;
int timeout = 100000;
while (!DCDCREADY && --timeout);
bool ok = DCDCREADY;
DCDCEN=0;
if (ok) sd_power_dcdc_mode_set(NRF_POWER_DCDC_MODE_AUTOMATIC)

I can't seem to find a 'ready' register though, and I'm not 100% sure if I can do this with the softdevice either?

thanks!

[Øyvind Karlsen]

Hi,

There's no way to detect the DCDC filter in hardware. I would add a small table containing the boards you wish to use along with a true/false state for filters and then decide the DCDCREADY state depending on that.

Best regards,

Øyvind

[Gordon]

Ok, thanks for the speedy response.