Create PWM sequence using TIMER/GPIOTE/PPI

RE: Create PWM sequence using TIMER/GPIOTE/PPI

Ian — Wed, 14 Sep 2016 17:55:35 GMT

Hi Stefan,

The intermittent issues caused the PWM to jump to 100% occasionally when using the soft device. The issue was brought up with Martin and Ole previously.

I ended up using an app timer to do the PWM in a similar way as low_power_pwm does, as it did not need to be accurate. I was hoping to avoid using interrupts but current consumption of the LF clock is so low that this method is adequate.

Thanks for the help, Ian

RE: Create PWM sequence using TIMER/GPIOTE/PPI

Stefan Birnir Sverrisson — Wed, 10 Aug 2016 08:27:52 GMT

Hi Ian

What intermittent issues are you having with the PWM driver?

There are two pwm libraries available in the SDK, one is the pwm_library, which uses TIMER+GPIOTE+PPI. Another library is the low_power_pwm, which uses application timers and RTC1 in the background. It is therefore not very accurate but can control e.g. LEDs etc. There are examples in SDK 11.0.0 that use both those libraries.