npm1300 one button sample

[mej7000]

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I can't seem to get the one button sample to do anything... I get a steady ~1sec flash from HOST led on the npm1300, but I get nothing from pushing SHPHLD for any duration of time.

   ============  ============  =========================================================

   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

   ============  ============  =========================================================

I am unclear as to what the USB connections should be. I've tried

1. npm1300 J3 both connected and not connected.
2. npm1300 J4 not connected
3. nrf52840dk J2 connected and not connected

nothing seems to change the npm1300/nrf52840dk behavior, also it's unclear which **LED** the sample is referring to.

I get this from the nrf52840 Serial output:

*** Booting nRF Connect SDK v3.5.99-ncs1-1 ***
PMIC device ok
uart:~$

Not sure what I am missing here. No matter how long I push SHPHLD - Host continues to flash at a steady rate and no other LEDs activate...

I've included photos of my connections. I have an unrelated SPI Display connected, but unused.

The one button sample code is completely unmodified from the VSCode samples and all the jumpers on npm1300ek are as they came out of the box.

My Connections:

* - SDA nPM1300ek - P0.26 nrf52840dk
* - SCL nPM1300ek - P0.27 nrf52840dk

* - GPIO3 nPM1300ek - P0.22 nrf52840dk

* - VDDIO nPM1300ek - VDD nrf52840dk
* - GND nPM1300ek - GND nrf52840dk

[Andy Sinclair]

Hi.

The flashing Host LED shows that the communications between the host and the PMIC is working correctly.

Do you see a transition on GPIO3 with a scope?
I would expect to see a transition on this output when you press SHPHLD for the first time.
On a working system this output should remain high for about 1ms, before it is cleared by the host.

One problem I see in your setup is the use of VDDIO.
It should be connected to either the host, or a buck, not both.
Can you try removing the jumper on VDDIO REF?

Best regards
Andy

[mej7000]

I removed the jumper from VDDIO and VOUT2. Thanks!

This logic was not what I was expecting... The diagram shows what happens when

1. sw1 and sw2 are pushed
2. outputs on SHPHLD and GPIO3
3. the existing connections to the nrf52840dk

Does this look ok to you?

[Andy Sinclair]

Hi.

SW1 look good, but I am confused about SW2.
The samples uses GPIO3 as the interrupt output, but it does not have an associated button, it is only on the pin header.
If SW2 is connected to P0.22, that is GPIO0, not GPIO3

I get the following with this sample:

Best regards
Andy

[mej7000]

Thanks for looking at this... I hadn't notice this before, but regarding the VDDIO and VOUT2 jumper I get:

remove jumper:

*** Booting nRF Connect SDK v3.5.99-ncs1-1 ***
Error: led device is not ready
uart:~$

return jumper:

*** Booting nRF Connect SDK v3.5.99-ncs1-1 ***
PMIC device ok
uart:~$

Also, I put the Analyzer on all five GPIOs:

I was also looking more closely at the code... I don't get any LED flashing on the nrf52840dk, but it looks like one of them should be flashing all the time? When I add a printk statement I get the output, but no flashing on any nrf52840dk led...

    while (1) {

        printk("."); // added this, it does print, but I get no led flashing on the 53840dk. ever.

        led_on(leds, 2U);

        k_msleep(flash_time_ms);

        led_off(leds, 2U);

        k_msleep(flash_time_ms);

    }