nRF9160 DK & Seeed Relay Shield v3.0

[Francis S]

Please provide sample code on how to configure pins to control Relay Shield from Seeed on nRF9160 DK

https://wiki.seeedstudio.com/Relay_Shield_v3/

I have used the following code but it is not working:

struct device * relay_device = device_get_binding(DT_LABEL(DT_NODELABEL(gpio0)));

gpio_pin_configure(relay_device, 4, GPIO_OUTPUT);
gpio_pin_configure(relay_device, 5, GPIO_OUTPUT);
gpio_pin_configure(relay_device, 6, GPIO_OUTPUT);
gpio_pin_configure(relay_device, 7, GPIO_OUTPUT);

gpio_pin_set(relay_device, 4, true);
gpio_pin_set(relay_device, 5, true);
gpio_pin_set(relay_device, 6, true);
gpio_pin_set(relay_device, 7, true);

[Francis S]

Found the answer in the zephyrproject documentation. Set pins 4-7 to "Route to Arduino pins" 

docs.zephyrproject.org/.../index.html

Board controller firmware

The board controller firmware is a small snippet of code that takes care of routing specific pins on nRF9160 SiP to different components on the board, such as LEDs, switches, and specific nRF52840 SoC pins.

When compiling a project for nrf9160dk_nrf52840, the board controller firmware will be compiled and run automatically after the Kernel has been initialized.

By default, the board controller firmware will route the following:

Component	Routed to
nRF9160 UART0	VCOM0
nRF9160 UART1	VCOM2
LEDs 1-4	physical LEDs
Buttons 1-2	physical buttons
Switches 1-2	physical switches
MCU Interface 0	Arduino pin headers
MCU Interface 1	Trace interface
MCU Interface 2	COEX interface

It is possible to configure the behavior of the board controller firmware by using Kconfig and editing its options under “Board options”.