nrf51 not waking up if sleep time exceed (5 hours)

RE: nrf51 not waking up if sleep time exceed (5 hours)

Susheel Nuguru — Tue, 23 Feb 2016 09:56:50 GMT

You set the prescaler value in APP_TIMER_INIT macro. Softdevice handler has nothing to do with app_timer configuration,

RE: nrf51 not waking up if sleep time exceed (5 hours)

makouda — Tue, 23 Feb 2016 09:55:44 GMT

as I understand : “The RTC will run off the LFCLK.” There are two RTC instances, RTC0 and RTC1. The app_timer APIs use RTC1. The BLE stack SD uses RTC0. I'm I right

RE: nrf51 not waking up if sleep time exceed (5 hours)

makouda — Tue, 23 Feb 2016 09:53:06 GMT

also im initialising the softdevice with SOFTDEVICE_HANDLER_INIT(NRF_CLOCK_LFCLKSRC_RC_250_PPM_4000MS_CALIBRATION, false);

RE: nrf51 not waking up if sleep time exceed (5 hours)

makouda — Tue, 23 Feb 2016 09:50:34 GMT

#define APP_TIMER_PRESCALER 0

RE: nrf51 not waking up if sleep time exceed (5 hours)

Susheel Nuguru — Tue, 23 Feb 2016 09:49:34 GMT

app timer runs when the chip is sleeping, what is the prescalar you are using?

RE: nrf51 not waking up if sleep time exceed (5 hours)

makouda — Tue, 23 Feb 2016 09:48:10 GMT

im using app_timer. but when the nrf is sleeping, does the timer run ??????????? I thought everyghing is sleeping

RE: nrf51 not waking up if sleep time exceed (5 hours)

Susheel Nuguru — Tue, 23 Feb 2016 09:16:44 GMT

What timer are you using TIMER1 or RTC1(app_timer)? And what prescaler are you using? Timer1 is a 16-bit module and RTC is 24-bit, so you need to select your prescaler right. If you increase your prescaler for the timer ticks of 5 hours to fit into CC register, then it should work fine.