Undefined reference to 'nrf_dfu_button_enter_check'

RE: Undefined reference to 'nrf_dfu_button_enter_check'

Kyle Krueger — Thu, 21 Dec 2017 16:42:47 GMT

That is still a workaround though. Given that buttonless dfu is supported, it should be expected that all code referencing button presses may be safely removed.

RE: Undefined reference to 'nrf_dfu_button_enter_check'

Hung Bui — Thu, 21 Dec 2017 16:30:46 GMT

Not sure why it's complaining, in our example the function is defined in main.c:

bool nrf_dfu_button_enter_check(void)
{
    if (nrf_gpio_pin_read(BOOTLOADER_BUTTON) == 0)
    {
        return true;
    }
    
    return false;
}

RE: Undefined reference to 'nrf_dfu_button_enter_check'

MartinBL — Fri, 08 Dec 2017 11:02:20 GMT

Thank you for the report. I have forwarded your suggestion to the the SDK team.

RE: Undefined reference to 'nrf_dfu_button_enter_check'

Kyle Krueger — Thu, 07 Dec 2017 11:44:24 GMT

A workaround is to make a define of the function in the bootloader code even though the function is not needed.

bool nrf_dfu_button_enter_check(void)
{
    return false;
}

I would suggest fixing this in the next release with a weak function declaration within the SDK that doesn't do anything.

@brief Empty button press handler to be overridden when not using buttonless DFU
__weak bool nrf_dfu_button_enter_check(void)
{
    return false;
}