nRF52 dk gpio probelem

RE: nRF52 dk gpio probelem

huidi — Tue, 20 Dec 2016 05:27:31 GMT

P2/P8 Analog in

PIN #

Signal Name

NRF52832 Functions

1 A0 P0.03 / AIN1
2 A1 P0.04 / AIN2
3 A2 P0.28 / AIN4
4 A3 P0.29 / AIN5
5 A4 P0.30 / AIN6
6 A5 P0.31 / AIN7

P3/P9 Digital I/O

PIN #

Signal Name

NRF52832 Functions

1 D0 (RX) P0.11
2 D1 (TX) P0.12
3 D2 P0.13
4 D3 P0.14 / TRACEDATA[3]
5 D4 P0.15 / TRACEDATA[2]
6 D5 P0.16 / TRACEDATA[1]
7 D6 P0.17
8 D7 P0.18 / TRACEDATA[3] / SWO

P4/P10 Digital I/O

PIN #

Signal Name

NRF52832 Functions

1 D8 P0.19
2 D9 P0.20 / TRACECLK
3 D10 (SS) P0.22
4 D11 (MOSI) P0.23
5 D12 (MISO) P0.24
6 D13 (SCK) P0.25
7 GND N/A
8 AREF P0.02 / AIN0
9 SDA P0.26
10 SCL P0.27

RE: nRF52 dk gpio probelem

huidi — Tue, 20 Dec 2016 05:22:08 GMT

Thanks bro help a lot

RE: nRF52 dk gpio probelem

Sigurd — Mon, 19 Dec 2016 10:03:00 GMT

Hi,

You can see a list of all the GPIOs on the nRF52832 here. On the nRF52832 Development Kit some of the GPIOs are occoupied.

The buttons and LEDs uses the GPIOs from P0.13 to P0.20.
The 32.768 kHz crystal uses P0.00 and P0.01.
If you enable the NRF_LOG function in the SDK, P0.05->P0.08 is by default used for printing the data over UART.
P0.21 is used as a reset if the CONFIG_GPIO_AS_PINRESET define is present.
If you use the NFC, the GPIOs P0.10 and P0.09 will be used by the NFC antenna.

The above bulletpoints are illustrated in this drawing:

If you really need to use the GPIOs used by the buttons, LEDs or the external crystal for something else, this can be done by shorting/cutting the solderbridges. All the other GPIOs are free to be used.