Change in the PWM frequency at higher frequency

[Shikamaru]

Hi team,

            Currently am working on PWM example from SDK i.e. (Nordic SDK v1.8.0), am testing the pwm example from the sample i'e v (1.8.0\zephyr\samples\basic\blinky_pwm), blinky pwm example in BL653 board. In that example what am observing for higher frequency we are not getting the expected output , there is some alteration in output signal because of this is altering the period and so Duty cycle. But for smaller frequencies it is working fine . May i know the reason ...or is there any way to resolve this.

[Sigurd]

Hi,

What frequency are you trying to set?

[Shikamaru]

we tried on 500KHz, 450 Khz, 400 Khz as well as 600 kHz

[Sigurd]

You could try to use the nrfx driver directly instead. Here is an example that sets an 500 kHz, 50% duty signal:

nrfx_pwm.rar