How do I use the GPIO pin on nrf52 devices?

[Mitch996]

Hello, just a few quick short questions regarding nrf52 devices:

1. Do I have to configure and initialize them before using?

2. Which function should I use? I'm going with nrf_gpio_pin_write, hope its alright.

3. The most important one: I'm using QIAA package, and I want to operate P22 pin or pin 1.07, how do I do that? Should I write:

   nrf_gpio_pin_write(22, 1)

or

nrf_gpio_pin_write(103,1)

???

Edit: Make sure you use nrf_gpio_cfg_output properly first, before setting and resetting target pins.

[koniho]

For P0.22:

nrf_gpio_pin_write(22, 1)

should be correct.

For P1.07:

nrf_gpio_pin_write(39, 1)

where 32+7 = 39.

You can also use the NRF_GPIO_PIN_MAP macro which is defined as:

#define 	NRF_GPIO_PIN_MAP(port, pin)   ((port << 5) | (pin & 0x1F))
// Macro for mapping port and pin numbers to values understandable for nrf_gpio functions. 

[Walther]

Thank you for this information! I have been looking for this for half an hour now because I want to know it backwards. I wanted to know which pin is pin 45. All threads just lead to the macro which is no help. Why does nordic not provide such basic information somewhere? The folder components\drivers_nrf\hal\nrf_gpio.h  does not even exist in my SDK 15.3...