PWM Frequency

[Mike Zumbrunnen]

Hello, I've looked at the forum response for

devzone.nordicsemi.com/.../is-there-an-example-code-for-using-pwm-on-the-nrf51822-with-a-softdevice

I am unable to implement because, I think, I don't have access to all of the libraries included nor could I find. I'm using the nRF51822 in an RFDuino application running a pump and I need to get the PWM pin upwards of 5 kHz. I know I need to change pin designations but can't get that far yet.

Could use help on getting the libraries so I can examine and try to change correctly.

THX. Mike

[Mike Zumbrunnen]

Hello Ruben,

Thanks for the reply and links. I'll need to look at them and the SDK mentioned in the reply above yours.

What I did to get the project moving was implemented a work around. I haven't gotten back to solving the correct way which is adjusting the frequency in the RFDuino.

My work around was to use a Tiny85 as the PWM higher frequency generator. Basically, the low PWM signal from the RFDuino goes through a low pass filter so it looks like an analog out signal. The new analog signal is read by the Tiny85 and re-transmitted out of it as a higher PWM frequency to my pump motor. All is good.

This added about a buck to my project but got me moving on. Some day I'll return and do it right.

Hope this helps.

Mike

[Ruben]

Hi Mike,

thanks for your quick reply. Sounds like a good hack, but unfortunately that could not work for me. Mainly due to size restrictions, I still hope I manage to find a way to increase the PWM on the RFduino itself. I can't imagine that it would not be possible to do this.

I hope I'll find a solution soon :S

Cheers

R.