nRF52810 P0.14 out of control

RE: nRF52810 P0.14 out of control

ovrebekk — Wed, 02 Sep 2020 11:48:16 GMT

Good to hear you found the issue 🙂

That explains why the pin got set before the application could run ;)

RE: nRF52810 P0.14 out of control

Ryon_pan — Wed, 02 Sep 2020 10:04:07 GMT

very sorry,I pulled up these pins in the bootloader.

RE: nRF52810 P0.14 out of control

ovrebekk — Wed, 02 Sep 2020 08:45:17 GMT

I just tried it with an nRF52811 device, which is very similar to the nRF52810, and see no problems. I configure P0.14 as an output at the start of the application, and verify with a multimeter that the pin is low.

I ran the following simple code to test this:

int main(void)
{
    nrf_gpio_cfg_output(14);
    nrf_gpio_cfg_output(17);
    nrf_gpio_cfg_output(18);

    while (true)
    {
        nrf_delay_ms(500);
        nrf_gpio_pin_toggle(18);
    }
}

If you test the same code, will the issue remain?

To clarify, you're testing this on your own hardware?

Do you have more than one board to test with?

Best regards
Torbjørn

RE: nRF52810 P0.14 out of control

Ryon_pan — Tue, 01 Sep 2020 01:15:50 GMT

yes,the pins should default to low when configured as outputs,but pin 14(nRF52810) is high when configured as output,you can try.That's why I want to ask you.

My hardware is as follows：LED5 is pin 14.

Is the SDK set to high by default

RE: nRF52810 P0.14 out of control

ovrebekk — Mon, 31 Aug 2020 11:39:45 GMT

The pins should default to low when configured as outputs.

Can you check the state of the NRF_GPIO->OUT register after reset and see what it is configured to?

What kind of hardware board or module are you using?

Best regards
Torbjørn

RE: nRF52810 P0.14 out of control

SKR — Fri, 28 Aug 2020 12:26:55 GMT

Use "nrf_gpio_pin_clear(14);" after configuration to set pin 14 to low.

Configure unused pins as outputs and put them to low (good practice). If there is nothing attached to them to draw current, they will not consume power, no matter the state.