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  • Case ID: 298582
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Disable UART1 of nrf52840 DK and re-configure pins as GPIOs at runtime

siwa

Hi,

we are currently using NCS 2.0.2 on nRF52840.

Is it possible to disable uart1 via pinctrl or another library during runtime and re-configure the rx/tx as gpios?

We need to set the two pins in low-state to allow another module enter its sleep mode while the nrf stays awake.

Regards,

Simon

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  • +1

    Hi Simon, 
    Which sleep mode are you looking at ? 
    If you are thinking of system OFF I do think that it's possible. You can suspend UART and then use the nrf_gpio_* library to access the pins and change the state. (see system_off sample) . The main point here is that if you are entering system OFF , it's not very important how they would work after the system OFF entered. The chip will reset and start from beginning when waking up anyway. 

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  • +1

    Hi Simon, 
    Which sleep mode are you looking at ? 
    If you are thinking of system OFF I do think that it's possible. You can suspend UART and then use the nrf_gpio_* library to access the pins and change the state. (see system_off sample) . The main point here is that if you are entering system OFF , it's not very important how they would work after the system OFF entered. The chip will reset and start from beginning when waking up anyway. 

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