Button 4 to enter the DFU mode?

RE: Button 4 to enter the DFU mode?

asusss — Tue, 08 Oct 2019 15:50:56 GMT

how did you get started with the boot loader after successfully loading an application without clicking the 4 button?

RE: Button 4 to enter the DFU mode?

Adam Heinrich — Thu, 23 Jun 2016 14:10:08 GMT

Hello, thank you for quick answer. This is nice - I thought the bootloader was a binary blob (like the SoftDevice) but now I see that I am able to modify its source code to fit my needs.

RE: Button 4 to enter the DFU mode?

tesc — Thu, 23 Jun 2016 11:51:57 GMT

Hi,

Yes, the bootloader checks whether button 4 is held during startup, and if so enters DFU mode instead of starting the application.

In addition the bootloader uses an LED.

You will find the bootloader code in the SDK, under <sdk folder>\examples\dfu\bootloader. In main.c you will find BOOTLOADER_BUTTON and UPDATE_IN_PROGRESS_LED defined, near the top. These defines uses the board support package, so defining BOARD_PCA10028 will set up the bootloader to use the pin numbers for BSP_BUTTON_3 and BSP_LED_2 on that particular board.

Regards, Terje