Firmware needs to use three RTCs while nRF52810 has only two RTCs

Hello, I developed a custom PCB that uses the nRF52810 microchip, and I wrote a firmware that needs to use three RTCs.

The program is supposed to wake up the CPU by an RTC, and using the Soft Device S112, so the firmware needs to use three RTCs: one RTC to wake up the CPU, another RTC for the soft device, and a third RTC for the app_timer. However, I found out later that the nRF58210 microchip has only two RTCs. So, can you help with this issue? Is there a way to rewrite the firmware so that it only uses two RTCs? Please let me know if you need more information.

Parents

0 user6207 over 4 years ago

Why do you need an extra RTC to wakeup the CPU? You can use the same app_timer to configure this timer to wake the CPU. Any timer expiry will generate an interrupt that wakes the CPU from sleep states.
Cancel
Vote Up 0 Vote Down

Sign in to reply

Verify Answer

Cancel

Reply

0 user6207 over 4 years ago

Why do you need an extra RTC to wakeup the CPU? You can use the same app_timer to configure this timer to wake the CPU. Any timer expiry will generate an interrupt that wakes the CPU from sleep states.
Cancel
Vote Up 0 Vote Down

Sign in to reply

Verify Answer

Cancel

Children

0 user114723 over 4 years ago in reply to user6207

I don't completely understand the app_timer, so can you please tell me how to implement that? Thank you!
Cancel
Vote Up 0 Vote Down

Sign in to reply

Verify Answer

Cancel
0 user6207 over 4 years ago in reply to user114723

You need to understand the app_timer to be able to use it in the firmware. This app_timer library is one of the heaviest used and well documented libraries. Most of our examples are using app_timer for low accuracy/ lower power timer functionality.

You said that you already need to use the app_timer in your firmware. You just create an additional timer with the callback timeout that you need to wake the CPU.
Cancel
Vote Up 0 Vote Down

Sign in to reply

Verify Answer

Cancel