nrf_gpio_pin_read problem (always return 1)

[lyrics]

hi,all

I'm using nRF52833, s140.. pca10100.

I want to read my pcb's touch gpio..

If I touch it, it falls down to low. ( I checked it with scope..)

When viewed through nrf_gpio_pin_read, the value remains unchanged. (Continued high)

nrf_gpio_cfg_input(TOUCH_STATE, NRF_GPIO_PIN_PULLUP);

void touch_process(void)
{
    uint8_t touch;
    touch = nrf_gpio_pin_read(TOUCH_STATE);
    
    if(!touch)
    {
        TOUCH_TMR=1;
    }
    else
    {
        TOUCH_TMR=0;
    }
    TWI_TMR=1;
}

Is there anything I missed?

BR, lyrics

[Jørgen Holmefjord]

Hi,

Which GPIO pin number are you using for this input? Have you tried a different GPIO?

Some GPIOs are used for specific features both on chip-level and on the DKs.

Best regards,
Jørgen

[lyrics]

I fixed the problem.. I didn't define the gpio pin number correctly. 
Thanks to your advice, I was able to think about it one more time. Thank you.