Zephyr RTC build issue.

Question

Greetings, 
 In the process of adding the RTC driver to the project I am encountering a build error when I try to setup a device pointer. The offending line is: 
 const struct device *rtc_ptr = DEVICE_DT_GET(DT_NODELABEL(rtc0)); 
 In prj.conf I have added: 
 
 CONFIG_RTC =y 
 CONFIG_NRFX_RTC0 =y 
 CONFIG_COUNTER =y 
 
 The build error message is:

C:/ncs/v2.9.0/zephyr/include/zephyr/device.h:92:41: error: ' __device_dts_ord_82' undeclared here (not in a function) ; did you mean '__device_dts_ord_2'? 
 92 | #define DEVICE_NAME_GET(dev_id) _CONCAT(__device_, dev_id) 
 It appears that the device driver is not being compiled based on this error message. I am using V2.9.0 of the Zephyr SDK and building on a Windows PC with VS Code. 
 The configuration board target is nrf52dk/nrf52832 
 Are additional Kconfig options required to be enabled? 
 I am able to compile calls to RTC functions that don't require the device pointer such as: 
 rtc_time_to_tm( struct rtc_time *); 
 Thanks for any help with this issue!, 
 Best regards, 
 Mark

Mark P Clark · Accepted Answer

Greetings and thanks for the additional input! 
 Initially I tried changing the nrf52dk_nrf52832.overlay file which gave me the same build error. Revisiting the l3_e2 tutorial; I used the DeviceTree Visual Editor and under SOC I could see that the rtc0/1/2 were not enabled. after enabling rtc0 it updated app.overlay file at the same level as the /src directory. This added: 
 &rtc0 { status = "okay"; }; 
 After that I am able to build successfully and setup the device pointer as follows: 
 
 const struct device * rtc_ptr = DEVICE_DT_GET ( DT_NODELABEL (rtc0)); 
 
 I would have expected the overlay file in /boards to have the same effect, evidently the app.overlay file takes precedence. 
 
 Thanks much for your help with this issue! 
 
 Best regards, 
 
 Mark

Zephyr RTC build issue.

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