RE: Led blink using buttons in nrf52840 development board.

haakonsh — Mon, 14 Oct 2019 08:31:07 GMT

I suggest you start with the Blinky Example and Timer Example.

Both use the Board Support Package (BSP) who's controlling LED's and buttons, but for controlling a GPIO directly I suggest you read the GPIO HAL API and the GPIO — General purpose input/output specification. See examples for GPIO usage in the BSP library.

For pin number larger than 31, ie. PORT 1, use NRF_GPIO_PIN_MAP, f.ex:

#define LED_PIN NRF_GPIO_PIN_MAP(1, 5) // Use Port1 pin5 (p1.5)

nrf_gpio_cfg_output(LED_PIN);   // Configure pin as output

nrf_gpio_pin_set(LED_PIN);      // Set high
nrf_gpio_pin_clear(LED_PIN);    // Set low
nrf_gpio_pin_toggle(LED_PIN);   // Toggle state