No RTC pin signals with SparkFun nRF52832 Breakout

106 Views Asked by At

I'm using the SparkFun nRF52832 Breakout to use the RTC signal for a sensor pressure clock line.

Unfortunately, on the two RTC pins, there are no signals. To verify this point, I used an oscilloscope to read pins 0 and 1.

Besides, I also created a sketch on another pin to generate my own square signal close to 33.333kHz, and I saw it on the oscilloscope.

I understand according to this tutorial that I do not need to modify the hardware.

RTC-EN - Connect/Disconnect the 32.768kHz Crystal

The nRF52832 Breakout equips the chip with a 32.768kHz crystal – connected to GPIO pins 0 and 1. Unfortunately, those pins make up a quarter > of the available ADC inputs. So, if your application doesn’t require an RTC – and you need those pins to for another purpose – grab a hobby knife and cut the two traces between their pads to disconnect the crystal.

Maybe I need to init the RTC pin with a dedicated method, but which one? Could you provide me a link to any tutorial?

Any ideas what I'm missing here? What is my misunderstanding?

0

There are 0 best solutions below