RTC0 AND RTC1

[anna]

hi , I have a question about rtc.In my project ,I use rtc1 for app timer and rct0 for low_power_pwm.The problem is that I dont't have any idear to enable rtc0 instead of rtc1 in the low_power_pwm .Thank you very much.And i use sdk 10.0 .

[Sigurd]

Hi,

The low_power_pwm library uses the app_timer (which in turn use RTC1). You can create multiple timers with the app_timer, so there is no need to use RTC0 for the low_power_pwm.

[anna]

Hi,Sigurd
I just want to use low_power_pwm to control three leds .I don't think it's a good choice that using app_timer to control three leds .Thank you very much.

[Sigurd]

The low-power PWM library is for applications where you don't need high frequency or accuracy. The low power pwm example should be suitable for LEDs, as LEDs usually do not require that high PWM frequency. But for peripherals that need a high accuracy, you should use the PWM library instead.

As the low-power PWM library use the apptimer, the configuration of the apptimer determines the frequency range supported by the low-power PWM library. The "period" in the low-power PWM library is in app_timer in ticks, which depend on the prescaler of the RTC1, which is set with when you call APP_TIMER_INIT() with APP_TIMER_PRESCALER.

[anna]

Hi,Sigurd Thank you very much .I learn something from your comment that I can use RTC1 for app timer and low -power pwm .And am I right ?

[Sigurd]

Yes, that is correct.