nPM1300: One button

The One button sample demonstrates how to support wake-up, shutdown and user interactions through a single button connected to the nPM1300.

Requirements

The sample supports the following development kits:

Hardware platforms

PCA

Board name

Build target

nRF9160 DK

PCA10090

nrf9160dk_nrf9160

nrf9160dk_nrf9160

nRF5340 DK

PCA10095

nrf5340dk_nrf5340

nrf5340dk_nrf5340_cpuapp

nRF52 DK

PCA10040

nrf52dk_nrf52832

nrf52dk_nrf52832

nRF52840 DK

PCA10056

nrf52840dk_nrf52840

nrf52840dk_nrf52840

The sample also requires an nPM1300 EK.

Overview

The nPM1300 SHPHLD/RESET button controls the device state. The sample controls an LED, load switch and nPM1300 power mode based on button press duration.

The nPM1300 GPIO3 pin is configured as an interrupt output, and is used to signal button press and USB detection events to the host.

Wiring

  1. Make the following connections on the nPM1300 EK:

    • Remove all existing connections.

    • On the P1 pin header, connect VBATIN and VBAT pins with a jumper.

    • On the P13 pin header, connect RSET1 and VSET1 pins with a jumper.

    • On the P14 pin header, connect RSET2 and VSET2 pins with a jumper.

    • On the P15 pin header, connect VOUT1 and LSIN1 pins with a jumper.

    • On the P17 pin header, connect HOST and LED2 pins with a jumper.

    • Connect a suitable battery to the J2 connector.

  2. Connect the chosen DK to the nPM1300 EK as in the following table:

    nPM1300 EK connections.

    nPM1300 EK pins

    nRF52 DK pins

    nRF52840 DK pins

    nRF5340 DK pins

    nRF9160 DK pins

    SDA

    P0.26

    P0.26

    P1.02

    P0.30

    SCL

    P0.27

    P0.27

    P1.03

    P0.31

    GPIO3

    P0.22

    P0.22

    P1.12

    P0.10

    VDDIO

    VDD

    VDD

    VDD

    VDD

    GND

    GND

    GND

    GND

    GND

Building and running

This sample can be found under samples/pmic/native/npm1300_one_button in the nRF Connect SDK folder structure.

To build the sample with Visual Studio Code, follow the steps listed on the How to build an application page in the nRF Connect for VS Code extension documentation. See Configuring and building an application for other building scenarios, Programming an application for programming steps, and Testing and optimization for general information about testing and debugging in the nRF Connect SDK.

Testing

After programming the sample to your development kit, complete the following steps to test it:

  1. Connect the kit to the computer using a USB cable. The kit is assigned a COM port (Windows) or ttyACM device (Linux), which is visible in the Device Manager.

  2. Connect to the kit with a terminal emulator (for example, nRF Connect Serial Terminal). See Testing and optimization for the required settings and steps.

If the initialization was successful, the terminal displays the following message with status information:

PMIC device ok

Different length button presses:

Duration

Log output

Outcome

< 1 sec

Short press

Sample flashes LED at 5 Hz, LDSW 1 enabled

1 - 5 sec

Medium press

Sample flashes LED at 1 Hz, LDSW 1 disabled

5 - 10 sec

Long press

nPM1300 enters ship mode provided J3 is not connected

> 10 sec

None

nPM1300 long press reset activates

Ship mode is the lowest power state of the nPM1300. To exit ship mode, press the SHPHLD button or attach a USB cable to J3. In a production design, this will power off any device that is powered from an nPM1300 output.

The long press reset performs a full power cycle of the nPM1300 and resets all setting to powerup defaults. In a production design, this will reset any device that is powered from an nPM1300 output.

When using a separately powered development kit, you must restart the application to reconfigure the nPM1300 after exiting ship mode or long press reset.

Dependencies

The sample uses the following Zephyr libraries: