Use of RTC1 in nRF52805

RE: Use of RTC1 in nRF52805

WesC — Mon, 19 Sep 2022 15:50:00 GMT

Thanks; it took that second pair of eyes. I thought i had commented out the sleep_mode_enter(). but it was not.

I fixed that and it works. I appreciate your help

RE: Use of RTC1 in nRF52805

Kenneth — Wed, 14 Sep 2022 12:16:44 GMT

I searched throught the project, I could not see that you actually checking any error codes when calling app_timer_*() api?

Also, make sure you don't call sleep_mode_enter() sometime here, this will put the chip in system off mode, which stop all clocks.

Kenneth

RE: Use of RTC1 in nRF52805

WesC — Wed, 14 Sep 2022 11:33:28 GMT

I dont see an error. I will look at the terminal window to verify this, but it does not seem to enter the handler for the timer since i do not see the LED toggle.

RE: Use of RTC1 in nRF52805

Kenneth — Tue, 13 Sep 2022 20:38:30 GMT

Any error codes from the app_timer?

Kenneth

RE: Use of RTC1 in nRF52805

WesC — Tue, 13 Sep 2022 19:27:59 GMT

My original code was for a 52840 and used RTC2. Since this is targeted at the nRF52805 i changed it to RTC1, but that wasn't working. So I have modified my code to just use the app_timer. my intent is to advertise for a period of time then when advertising stops, start the timer. when the timer is triggered (i set it to 5 Seconds) i want it to wake and advertise again. i also want to start the timer on a disconnect. my code compiles, but does not run. Can you look at the attached code and let me know if you see why it does not seem to trigger the timer. devzone.nordicsemi.com/.../ble_5F00_app_5F00_uart_5F00_52805.zip

RE: Use of RTC1 in nRF52805

Kenneth — Tue, 13 Sep 2022 11:17:11 GMT

Hello,

It's not clear to me what you are trying to achieve here. The app_timer module use RTC1 and is intende to be used to execute a callback at given interval or execute a single shot callback some time in the future. It ensure low power operation and can for instance be used to wakeup the chip after a period of time, the library documentation and looking at some of the ble examples should be good starting point, e.g.:
https://infocenter.nordicsemi.com/topic/sdk_nrf5_v17.0.2/lib_timer.html

It's not clear to me why you are in parallell trying to use the RTC1 directly, it seems like you want to re-invent something that the app_timer already do excellent. It would be very problematic to have many software modules relying on app_timer, and then you try to go bare metal (without any obvious pros since the current is the same) using the same RTC1.

Kenneth