nrf52832 RTC example not working for RTC1

[Pavithra]

In nrf52_SDK/examples/peripherals/rtc we tried adding the UART prints and verified. It was working fine for RTC0 but fails to do for RTC1. Could you please give any hint on this?

[tesc]

• In what way does it not work?
• What have you done to change from RTC0 to RTC1?

[Pavithra]

I changed the following for using RTC1,

1. const nrf_drv_rtc_t rtc = NRF_DRV_RTC_INSTANCE(0); to const nrf_drv_rtc_t rtc = NRF_DRV_RTC_INSTANCE(1);
2. RTC0_CONFIG_FREQUENCY to RTC1_CONFIG_FREQUENCY
3. enabled RTC1 in nrf_drv_config.h file.

As per the example, LED0 should blink for every ticks and LED 1 should be ON after 3 seconds. This happened for RTC0 and RTC2. But this did not happened for RTC1.

[tesc]

Hi,

For the particular example, you will see that RTC0 is configured like this, in examples\peripheral\rtc\config\rtc_pca10036\nrf_drv_config.h (or the equivalent for your SDK version and board):

#define RTC0_CONFIG_FREQUENCY    8

This means to get the same behaviour (the same blinking frequency) when using RTC1, you must set RTC1_CONFIG_FREQUENCY to 8:

#define RTC1_CONFIG_FREQUENCY    8

For other examples, as well as in the default nrf_drv_config.h file, there is an error on line 104:

#define RTC1_CONFIG_FREQUENCY    32678

It should rather be:

#define RTC1_CONFIG_FREQUENCY    32768

This was a typo in the SDK. It does not however apply for the peripheral\rtc\ example, and it may be correctly set for some of the other examples as well.

Regards, Terje

[Pavithra]

sorry, I forgot to mention. I did the above change too.

[tesc]

Ok,

• What board (pca100??) and board version are you using?
• Are the LEDs constantly off, or do you see any LED behaviour?
• What particular SDK version are you using?