How do I use the GPIO pin on nrf52 devices?

RE: How do I use the GPIO pin on nrf52 devices?

Luke Galea — Fri, 22 Nov 2019 09:13:31 GMT

How would you use nrf_gpio_cfg_output with pins on other ports such as P1,03 etc...

RE: How do I use the GPIO pin on nrf52 devices?

Walther — Fri, 14 Jun 2019 09:36:52 GMT

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...

RE: How do I use the GPIO pin on nrf52 devices?

brian fleming — Sun, 23 Sep 2018 01:40:11 GMT

Is the closing bracket ' ] ' a typo?

RE: How do I use the GPIO pin on nrf52 devices?

brian fleming — Sun, 23 Sep 2018 01:38:41 GMT

This is the best answer, but for all the newbies out there (like me) it is always helpful to put the complete code in the answer like the below.

nrf_gpio_cfg_output(0) ; // In this case the '0' is the pin number you wish to config as an output.

RE: How do I use the GPIO pin on nrf52 devices?

Mitch996 — Mon, 31 Jul 2017 02:42:00 GMT

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.

RE: How do I use the GPIO pin on nrf52 devices?

endnode — Wed, 26 Jul 2017 08:35:20 GMT

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

nrf_gpio_range_cfg_output(...)

and then set it high or low by one of functions

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

RE: How do I use the GPIO pin on nrf52 devices?

Mitch996 — Wed, 26 Jul 2017 07:31:07 GMT

@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; ???

RE: How do I use the GPIO pin on nrf52 devices?

Roger Clark — Wed, 26 Jul 2017 07:07:01 GMT

Don't you need to call

 nrf_gpio_cfg_output(PIN_NUMBER]);

first?

RE: How do I use the GPIO pin on nrf52 devices?

koniho — Wed, 26 Jul 2017 06:56:33 GMT

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.