mbed nRF51 Real Time Clock

RE: mbed nRF51 Real Time Clock

Amy — Thu, 29 Jun 2017 07:12:20 GMT

Hi, Rajneesh, Do you modify the divider to get 1Hz successfully? If yes, can you share how to set the divider to get 1Hz? I tried many ways, the lowest frequency just get 8Hz as example.

Thanks.

RE: mbed nRF51 Real Time Clock

Rajneesh — Fri, 07 Apr 2017 18:17:48 GMT

I will do it by my self.

Many thanks.

RE: mbed nRF51 Real Time Clock

Hung Bui — Tue, 04 Apr 2017 13:27:21 GMT

We don't have example for real time clock with date and time. You need to implement that on your own. What you see in the RTC example fjonsson pointed to was a TICK event at 8Hz , you can modify the divider to get to 1Hz and then you have TICK every second. You would need to do the counting for date and time on your own. But I guess there is lots of example codes of doing that on the net.

RE: mbed nRF51 Real Time Clock

Rajneesh — Mon, 03 Apr 2017 16:36:13 GMT

@Hung Bui: I am working on nRF51 and sensors are interface. I wants to save sensors data into flash with current timeStamp. I test with mbed real time clock which is updating UNIX time every second. I wants that kind of thing here.

If you can look into above link in mbed real time clock there are used one API call "attach" which is register interrupt for 1 second.

Thanks in advance if you can help me to implement same kind of thing by using Real Time Counter as above suggested link.

Thanks Rajneesh

RE: mbed nRF51 Real Time Clock

Hung Bui — Mon, 03 Apr 2017 13:45:35 GMT

@Rajneesh: What exactly do you want to do with the RTC ? In the example that fjonsson pointed to we use the RTC to toggle and LED on TICK event at 8Hz and a compare event after counting TICK event to 3.

It's a good example on how to use the RTC.

RE: mbed nRF51 Real Time Clock

Rajneesh — Mon, 03 Apr 2017 12:03:38 GMT

I have already read your mentioned link which says Real Time Counter is enable Real Time Clock. How?

But I think you forget the questions what I asked?

First read my question and come back with specific solution or suggestion. So other developer can take help from this thread.

Thanks, Rajneesh

RE: mbed nRF51 Real Time Clock

fjonsson — Mon, 03 Apr 2017 07:58:58 GMT

If you continue to read the first sentence in the example link I sent you it says "The Real Time Counter Example enables the real-time clock (RTC)...". The link you provided seems to do the same. I suggest you try these examples and return if you have more specific questions.

RE: mbed nRF51 Real Time Clock

Rajneesh — Mon, 03 Apr 2017 07:08:13 GMT

Do you know how to implement real Time Clock for nRF51 with support of Nordic SDk

Thanks Rajneesh

RE: mbed nRF51 Real Time Clock

Rajneesh — Mon, 03 Apr 2017 07:06:33 GMT

I forget to mention link. Please find below link:

developer.mbed.org/.../

In this link there are implemented Real Time Clock for nRf51.

Also Above RTC example link is "Real Time Counter" not Real Time Clock.

RE: mbed nRF51 Real Time Clock

fjonsson — Sun, 02 Apr 2017 15:38:36 GMT

You didn't provide any link in you question...

But there is a RTC example in the Infocenter.