RE: LED2 slowly blinking when Bootloader + SD are programmed to empty DK

Amanda Hsieh — Mon, 22 Nov 2021 12:17:01 GMT

Hi,

The open bootloader example (examples/dfu/open_bootloader) is provided only with USB CDC ACM DFU Transport. See Open Bootloader with DFU documentation.

If you look into the code, the LED2 means NRF_DFU_EVT_DFU_INITIALIZED:

        case NRF_DFU_EVT_DFU_INITIALIZED:
        {
            bsp_board_init(BSP_INIT_LEDS);

            if (!nrf_clock_lf_is_running())
            {
                nrf_clock_task_trigger(NRF_CLOCK_TASK_LFCLKSTART);
            }
            err_code = app_timer_init();
            APP_ERROR_CHECK(err_code);

            led_sb_init_params_t led_sb_init_param = LED_SB_INIT_DEFAULT_PARAMS(BSP_LED_1_MASK);

            uint32_t ticks = APP_TIMER_TICKS(DFU_LED_CONFIG_TRANSPORT_INACTIVE_BREATH_MS);
            led_sb_init_param.p_leds_port    = BSP_LED_1_PORT;
            led_sb_init_param.on_time_ticks  = ticks;
            led_sb_init_param.off_time_ticks = ticks;
            led_sb_init_param.duty_cycle_max = 255;

            err_code = led_softblink_init(&led_sb_init_param);
            APP_ERROR_CHECK(err_code);

            err_code = led_softblink_start(BSP_LED_1_MASK);
            APP_ERROR_CHECK(err_code);
            break;

Regards,
Amanda