nRF52833 GPIO P1.00 mapping to pin number

[Neo Serdes]

P0.25 is accessible by below:

nrf_gpio_pin_set(25);

However, when I try to access P1.00: 

Neither this:

nrf_gpio_pin_set(1);


Nor this works:

nrf_gpio_pin_set(32);

How to find the mapping between GPIO numbers and pin names?

thanks,
Neo

[Jared]

Hi,

Can you specify what you mean by doesn't work, the pin isn't set to VDD?  Have you measured directly on the pin? Are you using a DK or a custom board? If you're using a custom board, could you share the board file that you're using. 

regards

Jared 

[Neo Serdes]

By not working, I mean when I connect LED to pin 25, LED will work. However, same code won't work on pin 1.00 or anything like P1.xx. 

[Jared]

Hi,

Are you using a custom board or a DK?

What do you measure on the pin when you try to toggle the signal?

regards

Jared 

[Neo Serdes]

It is a custom board from Taiyo and the schematic looks like this. I connected a LED + resistor to this pin and it doesn't light up as the I connect them to P0.xx GPIOs. 

www.yuden.co.jp/.../TY_BLE_EYSPBN_EVBManual_V0_8_20200821.pdf

[Jared]

But what voltage level do you see if you measure directly on the pin?

[Neo Serdes]

I measured 30 - 40mV no matter I set or clear this GPIO. 

#define led NRF_GPIO_PIN_MAP(1,9)

//nrf_gpio_pin_set(led);
nrf_gpio_pin_clear(led);

[Jared]

Hi,

P1.00 is at Port 1, Pin 0. Which mean that you should use #define led NRF_GPIO_PIN_MAP(1,0)