rtc0 use "rtc_shell" can not set/get time?

[upupsky]

software: ncs 2.5.0, zephyr\samples\drivers\counter\alarm

hardware: nRF52840dk

Step1: main.c is not be revised!!!

Step2: prj.conf like this:

CONFIG_PRINTK=y
CONFIG_COUNTER=y
CONFIG_RTC=y
CONFIG_RTC_UPDATE=y
CONFIG_RTC_ALARM=n
CONFIG_SHELL=y
CONFIG_SHELL_BACKEND_SERIAL=y
CONFIG_RTC_SHELL=y

Step3: overlay file like this:

&rtc0 {
	status = "okay";
	label = "rtc0";
};

Step4: Connect USB into xshell , then build and reboot, output info like this:

*** Booting nRF Connect SDK v2.5.0 ***
Counter alarm sample

Set alarm in 2 sec (65536 ticks)


uart:~$ !!! Alarm !!!
Now: 2
Set alarm in 4 sec (131072 ticks)
!!! Alarm !!!
Now: 6
Set alarm in 8 sec (262144 ticks)
!!! Alarm !!!
Now: 14
Set alarm in 16 sec (524288 ticks)
rtc set rtc0 20!!! Alarm !!!
Now: 30
Set alarm in 32 sec (1048576 ticks)
12!!! Alarm !!!
Now: 62
Set alarm in 64 sec (2097152 ticks)

Error in argument format
uart:~$ 
uart:~$ 
uart:~$ 
uart:~$ rtc set rtc0 2012-10-15T22:15:15
uart:~$ 
uart:~$ rtc get rtc0
in RTC Shell Get
1900-47632-47627T536878248:31959:42760:000000
uart:~$ 
uart:~$ 
uart:~$ rtc get rtc0
in RTC Shell Get
1900-47632-47627T536878248:31959:42760:000000
uart:~$ 

Question:

1. in other project B(with ble adv), I can not "device_get_binding("rtc0")" , device can't fond. overlay rtc0 label is "rtc0",  how every this projcet(project A) is ok.

2. use shell to set time "rtc set rtc0 2012-10-15T22:15:15", there is no errors, but "rtc get rtc0", it is error like "1900-47632-47627T536878248:31959:42760:000000", it is a joke for me.

3. after a while, i shell "rtc get rtc0", it is still like "1900-47632-47627T536878248:31959:42760:000000", RTC is not runing? it is a joke for me again.

4. how to use rtc for calendar in my project A and B.

[Elfving]

Hello,

Just to start off, I want to say that this is a sample from Zephyr, and not directly made by us. Therefore there might be some things that do not work that well with our boards right out of the box, it might need some additional configuration.

If you find dts configurations confusing I would recommend having a look at the DevAcademy course on this.

What does project B consist of? 

Regards,

Elfving

[upupsky]

Please ignore my project B. How should project A be modified to enable RTC? This is the key to the problem. RTC is a commonly used peripheral. Do you have any other suggestions?

[upupsky]

finally, there is no rtc dirver in nordic driver, because rtc is used by softdevice, so we can simulate rtc, then "rtc get rtc_emul" can work well, overaly file like:

/{
	rtc_emul{
		status ="okay";
		compatible = "zephyr,rtc-emul";
		label = "rtc_emul";
		alarms-count = <2>;
	};
};

[Elfving]

Hello again, hope you've had a good week-end.

Am I understanding it correctly in that you've solved this? If so, great! And I am glad that you've included your solution as well, in case anyone else runs into the same issue in the future.

Regards,

Elfving