RE: nRF52 PWM frequency question

Susheel Nuguru — Mon, 01 Feb 2016 09:47:32 GMT

Hi Nevill,

By the way, nRF52 do have PWM peripheral, why the example still using timer and PPI for PWM function? Is there any example to show how to use the real PWM peripheral?

This is because the SDK did not still implement the PWM hardware driver, it probably will come in the next release, I hope.

Also, can this pwm library been use with SD? I can't get PWM out put if I try to config it in beacon example (set before the SD is init)

Yes This library should work along side with SD, that was one of the main purpose of this driver.

Is there any way to get more higher frequency than 1MHz?

Its possible, You need to modify app_pwm macros and functions for this , so that they interpret the period_us values like you want.

pwm_calculate_timer_frequency
nrf_drv_timer_us_to_ticks

I do not recommend this last step as I do not know the side effect of it. After changing those you are on your own.

Good luck