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. 

[Roger Clark]

Don't you need to call

 nrf_gpio_cfg_output(PIN_NUMBER]);

first?

[Mitch996]

@koniho Yes I used this:

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

And @ Roger Clark I called that first, but it didn't work, as I feared most.

Is their any register magic possible? like hypothetically this:

GPIO_P1->Output_Lat=0x0080; ???

[endnode]

Come on, no function from components\drivers_nrf\hal\nrf_gpio.h have ever let me down. Simply init PIN or range as output by

nrf_gpio_cfg_output

or

nrf_gpio_range_cfg_output(...)

and then set it high or low by one of functions

nrf_gpio_pin_set(...)
nrf_gpio_pin_clear(...)

[Mitch996]

You are right, I tried to use my mock-up version of the pin map macro function, and there was an error in it. nrf_gpio_cfg_output is the way to go. Once that got done right, everything is AOK.