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sandeepmistry / arduino-nRF5

Arduino Core for Nordic Semiconductor nRF5 based boards
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Does the library support timers or watchdog? #121

Closed XaviLC closed 7 years ago

XaviLC commented 7 years ago

Hello

I've been looking through the repo looking for something similar to arduino RTCTimer or RTCZero libraries, is there a way that I can use similar libraries or functions? I would like to set up some timers that might make my nrf52 be woken up after certain amount of time.

Thanks in advance,

XaviLC commented 7 years ago

Hi @sandeepmistry or @dlabun could you tell me if the current status of this lib support the nordic drivers such as RTC driver or the watchdog driver ?

Thanks

d00616 commented 7 years ago

@XaviLC If you need some watchdog code, you can use my implementation of avr/wdt.h from https://github.com/sandeepmistry/arduino-nRF5/pull/55.

dlabun commented 7 years ago

There is no real time clock on nRF chips like the Arduino Zero has. As far as I know support for the Nordic watchdog has not been implemented yet.

carlosperate commented 7 years ago

There is no real time clock on nRF chips like the Arduino Zero has.

I'm not familiar with the Arduino Zero RTC capabilities, but the nRF micros do have a Real Time counter and if RTC oscillator is not included it can "synthesise" a 32.768 kHz clock from the HFCLK. Is there something else required that is missing?

dlabun commented 7 years ago

The Arduino Zero libraries you mention are for time keeping using the internal real time clock. There really isn't anything similar for the nRF.

carlosperate commented 7 years ago

Just to clarify that I wasn't implying there are is RTC library for the nRF51/2 available at the moment, just that these microcontrollers do have a Real Time Counter that could be used for this purpose (I though you were implying otherwise in your previous message, but I might have misinterpreted it). Even if this counter is already in use to provide the millis() and micros() functions, it could be configured to do both, no?

sandeepmistry commented 7 years ago

@XaviLC

could you tell me if the current status of this lib support the nordic drivers such as RTC driver or the watchdog driver ?

Nothing is present currently, pull requests welcome.

@carlosperate

Even if this counter is already in use to provide the millis() and micros() functions, it could be configured to do both, no?

Right, RTC1 is fixed for 1ms ticks, RTC0 is reserved for the soft device

Regular timers could be based on Paul's TimerOne library: https://github.com/PaulStoffregen/TimerOne - the CurieTimerOne library for the 101 was based on this.

I'm going to close this for now, as the original question was answered.