I have a question about developing prototype board firmware.

[schosdas]

Hello.

I'm going to make a prototype board and use it soon.  I will make a prototype board with nrf52840 and use it soon.

It's my first time developing a prototype board because I've only used a development board.  So I have a question about this.

The prototype board has a button that turns power on/off.  If I want to turn it off after turning it on and then turn it off again, I need to send a signal for it to the board, do you have any examples and information about this?

And I'm testing with nrf52DK right now, can I use the code I just developed? Should I change a lot of things other than changing the pin number?

I don't know many things because it's my first time making a prototype.

I'd really appreciate your help.

[Simonr]

Hi

First off, I would like to point you towards These application notes and white papers that we have on PCB design and antenna tuning: nAN40 - Circuit Board Guidelines for aQFN packages, nWP015 - Crystal Oscillator Design Considerations, and nWP017 - Antenna Tuning. You should also check out our guides/blog posts here on DevZone regarding Hardware and layout.

The simplest way to create an ON/OFF button in HW would be to have one that just cuts the power to the chip. The nRF52840 is equipped with a Power-fail comparator that can be enabled in order to provide the CPU with an early warning of an impending power supply failure.

And I'm testing with nrf52DK right now, can I use the code I just developed? Should I change a lot of things other than changing the pin number?

By this, do you mean if there are any changes necessary to port a project developed for the nRF52840 to work on the nRF52832?

Best regards,

Simon