Servo SAADC With nRF52832

RE: Servo SAADC With nRF52832

L.Baggio — Tue, 29 Jun 2021 07:00:46 GMT

thank you. I will try this

RE: Servo SAADC With nRF52832

haakonsh — Thu, 17 Jun 2021 10:59:55 GMT

I suggest you use the Limits event monitoring feature of the SAADC. This feature enables the SAADC to function similarly to a comparator.

You can set up the limits to correspond with a servo blocking state and start and stop continuous sampling on the PWM's EVENTS_SEQSTARTED and EVENTS_SEQEND events respectivly.
Then the SAADC will operate only when the PWM is running, and notify your application when the prest voltage limit has been reached.

RE: Servo SAADC With nRF52832

L.Baggio — Sat, 05 Jun 2021 19:21:54 GMT

I'am using MG996R, hobby servo 0-180 degrees.

I'm sending signal using pwm driver library with this function: nrfx_pwm_simple_playback(&m_pwm0, &seq0, 1, NRFX_PWM_FLAG_STOP);

I want to sample the adc while sending commands to servo or is there other method to check if shaft is blocked?

RE: Servo SAADC With nRF52832

haakonsh — Tue, 01 Jun 2021 09:16:24 GMT

That depends on your application.

The most omportant question is exactly WHEN do you want to sample the ADC?

What control signals do you send to the servo?

Is the servo just a DC motor, AC motor, stepper motor, or a regular hobby servo?

RE: Servo SAADC With nRF52832

L.Baggio — Wed, 26 May 2021 21:11:32 GMT

I mean how can I check if something is blocking the shaft of servo while rotating?

RE: Servo SAADC With nRF52832

haakonsh — Tue, 25 May 2021 08:37:19 GMT

[quote user=""]but don't know how to check voltage on every step.[/quote]

What do you mean by every step?

Can you share your code?