GPIO1.01 Pin Unresponsive on nRF5340 After Upgrading from NCS 2.4 to NCS v3.0.1

[szhaulai]

Hardware Setup:

• Board: custom board using nrf5340dk_nrf5340_cpuapp

• NCS Version: v3.0.1 (upgraded from v2.4 where it was working)

Problem Description:After upgrading from NCS v2.4 to v3.0.1, GPIO1.01 has become completely unresponsive to gpio_pin_set_dt() commands from the application core. The pin appears to be "stuck" at a fixed state regardless of attempts to change it programmatically.What Was Working (NCS v2.4):

• GPIO1.01 could be controlled normally using gpio_pin_set_dt()

Current Behavior (NCS v3.0.1):

• gpio_pin_set_dt(&lowpower, 1) and gpio_pin_set_dt(&lowpower, 0) have no effect on pin state

• Pin remains at a fixed logical state regardless of commands

[Ben_M]

Hi szhaulai,

did you solve this issue? I encountered the same problem as yours: GPIO1 doesn't work by using gpio_pin_set_dt() when upgraded from ncs2.6.0 to ncs2.9.0.

I would be grateful if you could give me some tips.

Best Regards!

Ben

[Ben_M]

Hi all，

Simply disabling UART in the device tree was not sufficient, because the forwarder node was still holding these pins.

The solution was to explicitly delete the UART node under gpio_fwd as follows:

&gpio_fwd
{ 
    /delete-node/ uart; 
};

This successfully released the pins, and they now work as expected.

I post this resolution in case it helps others who face similar issues.

Best regards,

Ben