nRF52840 and P0.24 output blinking on a PCA10056 board

RE: nRF52840 and P0.24 output blinking on a PCA10056 board

STE — Thu, 25 Nov 2021 13:26:33 GMT

Dear Sebastiaan,

thanks for your answer, I've followed in deep all the code and now I well understand how the framework work so I've solved just some minutes ago the trouble.

It was simple, inside the configuration file pca10056.h there are definitions about physical leds and buttons lines.

Inside the bsp_btn_ble.c module there are the function responsible to manage the buttons.

About the led and the P0.24 line this is related to the LED_1 inside the LEDS_LIST and is also managed by the on_adv_evt() handler by the bsp_indication_set(BSP_INDICATE_ADVERTISING); function, follow the code inside the bsp.c module take to the bsp_led_indication() function that is where the led are configured to indicate required state.

Thanks!

RE: nRF52840 and P0.24 output blinking on a PCA10056 board

Vidar Berg — Thu, 25 Nov 2021 13:19:04 GMT

Hello,

Are you using the nRF5 SDK or the nRF connect SDK? If you are using the nRF5 SDK, you can use the GPIO HAL here to drive the LED: GPIO HAL.

e.g.

#include "nrf_gpio.h"

nrf_gpio_cfg_output(24) // Configure P0.24 as an output

nrf_gpio_pin_toggle(24) // Toggle the output.

Best regards,

Vidar

RE: nRF52840 and P0.24 output blinking on a PCA10056 board

Sebastiaan Merckx — Thu, 25 Nov 2021 08:34:27 GMT

Maybe the device tree that you're using can give you some more insights?

And otherwise, check the hardware schematics of the board on which your custom board is based. What is connected to P0.24 of the reference board? Maybe it's just the UART TX pin, transmitting logs?