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103
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1
answer
Last activity 2017-12-13 03:13:35 +0200 by koh

nRF52832 P0.10 GPIO Voltage drop

Hi all,

I try to control IC by nRF52832.

[My Application]
・Supply 2.5V to nRF52832 and IC.
・Connect P0.10 to IRQ(IC)

[I did these setting]
・Define "CONFIG_NFCT_PINS_AS_GPIOS"
・P0.10 : INPUT, PULL DOWN

But, the IC's IRQ ... (more)

52
views
2
votes
1
answer
Last activity 2017-12-12 13:10:36 +0200 by Torbjørn Øvrebekk

Do the GPIO pins on the nrf52840 float during sleep? Or are they high/low?

Like it says in the title. I'm working on an embedded application where lifetime is pretty important, so I'm trying to get power consumption down as low as possible. I don't want current leaking through my GPIO ... (more)

35
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no
votes
no
answers
Last activity 2017-12-04 12:51:50 +0100 by jm_laird

GPIO pin reading wrong value

There seems to be an issue when reading GPIO pins returning false readings. I am using two pins for I2C communication, 26 and 27, I am configuring them with the required configuration for using I2C and then setting them high ... (more)

141
views
2
votes
1
answer
Last activity 2017-11-30 16:06:20 +0200 by Cedric

Parallel time-stamps of GPIO edges with PPI? (timer capture) [closed]

Hi, all!

Is it really possible to timestamp 4 GPIO edges in parallel with the nRF52?

It would need to be as fast as possible and some edges might be simultaneous so PPI seems to be the trick.

The documentations ... (more)

78
views
no
votes
1
answer
Last activity 2017-11-28 16:51:28 +0200 by Petter Myhre flag of Norway

Connection between two hidden NRF51822 modules

Hello

First of all, I would like to apologize if a similar question was already asked but all this BLE matter is so broad that it defeats me. I am planning to put two NRF51822 devices into my project. I ... (more)

41
views
1
vote
1
answer
Last activity 2017-11-23 05:13:50 +0200 by RK flag of Singapore

GPIO drive high Vf LED w/o current limiting resistor?

Specifically, sinking a Cree C503B green LED (Vf 3.2V at 20ma) from a GPIO configured for high drive, without a current limiting resistor, from VDD 3.6V?

Figure 23 “GPIO drive strength vs Voltage, high drive VDD=3.0V ... (more)

34
views
1
vote
1
answer
Last activity 2017-11-17 09:31:42 +0200 by Jørn flag of Norway

Forwarding GPIO Input to another GPIO Output

Hi,

I have a custom PCB board with a nRF52832 and a motion sensor. I cannot use a signal analyzer on the output from the sensor because of the shape and small size of PCB and its components and tools ... (more)

449
views
1
vote
2
answers
Last activity 2017-11-14 14:31:42 +0100 by Mikhail

How to handle GPIO interrupts while it is configures to SENSE low

Hi all: All of the example code is using GPIOTE to demonstrate how to handle GPIO interrupt. However, it just can configured HiTOLow/LowToHi/Toggle. If I want to trigger the interrupt by sense Low/High, how can I implement ... (more)

60
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no
votes
1
answer
Last activity 2017-11-13 16:47:19 +0200 by Torbjørn Øvrebekk

Grouping GPIO pins

Can anyone tell me whether it's possible, within the SDK (or otherwise!) to create a grouping of GPIO pins? Essentially, a design change means that we want to combine what were two distinct I2C busses (and so, 2xSDA and ... (more)

97
views
1
vote
1
answer
Last activity 2017-11-13 05:12:28 +0200 by Eliot Stock flag of United Kingdom

open drain output to GPIO input pin with pullup [closed]

Hi

I have a charger IC for a lithium ion battery on a custom board with an nRF52832. It's this one, from ST Micro, an STBC08:

http://www.st.com/content/st_com/en/p...

The charger IC has two ... (more)

38
views
1
vote
1
answer
Last activity 2017-10-20 19:31:48 +0100 by AmbystomaLabs flag of United States

GPIO pin errors

Hello, I am toggling two separate pins at different rates but it looks like for whatever reason the when I go to clear one gpio register it clears everything. I understand that writing a 0 to the outclr and dirset ... (more)

75
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no
votes
2
answers
Last activity 2017-10-19 17:23:53 +0100 by Chris L

Having trouble getting any gpio in examples to work?

I have the blinky examples working, but have not been able to get any example code using any gpio input to work. they compile fine but the buttons done seem to work. I'm using GCC compiler in Segger Embedded ... (more)

90
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1
vote
2
answers
Last activity 2017-09-13 09:46:19 +0200 by Denver

GPIOTE interrupt not working with softdevice s130

I am using the template example for S130(works fine). I tried adding a simple Pin interrupt on the code but it didn't call the pin interrupt handler everytime I press the button. I believe I'm using some ... (more)

68
views
no
votes
1
answer
Last activity 2017-08-30 11:37:21 +0100 by drahnr

zephyr gpio interrupt not fireing

I just tried the Button example on the nrf52-dk development board, and the interrupt for the defined button GPIO does not seem to *trigger

Zephyr 1.8.0 (fcb9144dc git)

make BOARD=nrf52_pca10040

and the example under

samples/basic/button ... (more)

722
views
1
vote
4
answers
Last activity 2017-08-23 16:08:53 +0200 by airshaven

nRF52832- why when using nrf_drv_spi with an ADXL362 I need to set the clock in high drive (H0H1)

Hello!

I am working on a project. The goal is to retrieve every seconds some acceleration data from the ADXL362 accelerometer.

I configured the spi in blocking mode by passing NULL as event handler nrf_drv_spi_init(_spi, &_spi_config, NULL);

This method ... (more)

179
views
no
votes
no
answers
Last activity 2017-08-17 18:10:40 +0200 by dingari

nrf52 GPIO sink & source current

Hi, I'm contemplating ways to drive a small RGB LED matrix with the nrf52832 in a really space-tight project. Ideally without any external components. I'ts maybe around 40 RGBs (5x8 grid, 120 individual LEDs to drive).

Charlieplexing would ... (more)

261
views
1
vote
2
answers
Last activity 2017-08-14 11:32:44 +0200 by Joakim Jakobsen flag of Norway

Setting GPIO pin as output pin

I am using nrf51822 DK. How to set GPIO pins as output pins and access the pins to set or reset the output.For example if I want to use pin 20 as output, how to configure that.I need ... (more)

122
views
3
votes
1
answer
Last activity 2017-08-11 13:04:39 +0200 by Joakim Jakobsen flag of Norway

Change Pin from Input to Output in runtime?

Hi, i have nrf52 and sdk13.1. Is this possible. I get NRF_ERROR_INVALID_STATE.

55
views
1
vote
1
answer
Last activity 2017-08-03 15:20:06 +0100 by Torbjørn Øvrebekk

Will GPIOTE Interrupt be generated when CPU is halted?

When performing flash operations, i.e. via FDS or FSTORAGE, etc. - will GPIOTE events be captured and 'queued' until the CPU is no longer halted?

Said another way:

Can I assume that a GPIO transition that occurs while CPU is ... (more)

135
views
1
vote
1
answer
Last activity 2017-08-02 21:34:56 +0200 by endnode

Enable pins 9 and 10 as GPIO on NRF52

Hi All,

I am developing a ble applications and am unable to get pins 9 or 10 to work as gpio. I understand that this is because, by default they are used by the NFC.

I have tried the following ... (more)

227
views
1
vote
1
answer
Last activity 2017-07-28 17:21:40 +0200 by endnode

NFC Usage as GPIO Pins

Hi all,

I am trying to configure the NFC Pins for usage in an SPI application. However they do not even work for a simple nrf_gpio_pin_set after configuring them with nrf_gpio_cfg_output . Every other Pin seems to work, though.

After some ... (more)

82
views
4
votes
2
answers
Last activity 2017-07-16 15:48:34 +0200 by Mahesh Venkitachalam flag of India

gpio pin as power source for other

Hello! Can I use one of the gpio pin as power source directly for other MC on my board (hx711 - ADC with current consumption in normal mode 1.5ma (from datasheet)). I understand I have to do it via transistor ... (more)

81
views
no
votes
1
answer
Last activity 2017-07-13 09:53:04 +0100 by Sigurd flag of Norway

NRF51822 generate pulse with GPIO

I am trying to use NRF51822 GPIO to generate a pulse with max width of 0.3us. According to other tickets in the forum and the product spec, NRF51822 should be able to generate a 50% duty PWM with 8MHz ... (more)

109
views
no
votes
2
answers
Last activity 2017-07-03 16:32:24 +0200 by Jørn flag of Norway

ADC with internal pull up

This is for the nRF51822.

I have done some tests where I configure a pin as input with pull up enabled and then reconfigure the pin for an adc measurement with 1/3 prescaler with band gap reference.

It looks ... (more)

2k
views
5
votes
2
answers
Last activity 2017-06-01 21:40:48 +0200 by Craig

max gpio current for nRF52

Hello, I just wanted to update previous similar questions for the nRF52 series, old one for nRF51 is here: https://devzone.nordicsemi.com/questi...

At page 151, section 20.4, of the nRF52832 Product Specification v1.0 I find that ... (more)

333
views
no
votes
no
answers
Last activity 2017-05-23 00:10:36 +0200 by Eliot Stock flag of United Kingdom

nRF52 reset behaviour on GPIO output pins

Hi. I have a board here based on the nRF52832, using SD 132 and SDK 13.0.0, with a modem on it that I'd like to keep powered on even when the Nordic is in system off mode ... (more)

96
views
1
vote
1
answer
Last activity 2017-05-18 12:26:56 +0200 by Bjørn Spockeli flag of Norway

Minimum pulse length to detect low level with GPIO SENSE for nRF52

Hi all

What is the minimum required length of a LOW pulse to be detected by the nRF52832 via GPIO SENSE mechanism? I couldn't find it in the product specification.

I want to wakeup the nRF with a LOW ... (more)

77
views
no
votes
1
answer
Last activity 2017-05-12 13:13:08 +0100 by Bjørn Spockeli flag of Norway

Small problem with using the GPIO to power system ON/OFF

Hi, I am really new to the Nordic products and programming for that matters. But, the thing is that I am in somewhat of a hurry. I would like to use a similar code to below to the one below ... (more)

84
views
no
votes
1
answer
Last activity 2017-05-11 10:58:16 +0100 by Jørn flag of Norway

What happens to nRF51822 if GPIO is set to source less current than required?

I have a board with some LEDs that are driven in the same way as with the nRF51 DK board (i.e. there is a resistor in series with the LED and you drive the pin low to turn the ... (more)

162
views
no
votes
2
answers
Last activity 2017-05-08 08:39:40 +0100 by Damian

nRF52832 one of output (p0.15) lost its power

Hi!

I have noticed strange problem with one of GPIOs - P0.15. We have tested 50 devices based on nRF52832 and 3 of them have problem with P0.15 after few days.

P0.15 pin we have connected with two ... (more)

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