DFU programming

[Tai]

Hi everybody,

I am trying to program a custom board via DFU without success. I can build bootloader and zip file. I can even program the file by nRFToolbox on device but it does not work after programming.

Now my questions are:

1- Should I build the bootloader with my custom board or with a standard board files?

2- what about CONFIG_NFCT_PINS_AS_GPIOS? Where should I define them? In bootloader and application options?

[Tai]

Hi Elinar,

Thanks agian for your reply.

Now everything is ok. I am using reset and NFC pins as GPIO.

However, I still have an issue. When the program enter to sleep mode, the board backs to DFU mode after waking up. Is there anything I forgot to avoid DFU mode?

[Einar Thorsrud]

Hi,

Can check the bootloader logs? The reason for entering DFU bootloader is logged in dfu_enter_check() in nrf_bootloader.c (assuming SDK 15).

[Tai]

0537.log.txt

Here is the log file:

1- firmware uploaded

2- turn off-on the board to run the application

3- waiting for sleep mode of application:

static void sleep_mode_enter(void)
{
ret_code_t err_code;

err_code = bsp_indication_set(BSP_INDICATE_IDLE);
APP_ERROR_CHECK(err_code);

// Prepare wakeup buttons.
err_code = bsp_btn_ble_sleep_mode_prepare();
APP_ERROR_CHECK(err_code);

// Go to system-off mode (this function will not return; wakeup will cause a reset).
err_code = sd_power_system_off();
APP_ERROR_CHECK(err_code);
}

4- push the button to wake the application up

[Einar Thorsrud]

Hi,

You can see from the log that the GPIO pin used to enter DFU mode is asserted:

00> <debug> app: DFU mode requested via button.

If you do not use the same button for wakeup as to signal enter DFU mode, then this indicate that you have an issue with your bootloader configuration or perhaps a HW issue with the DFU enter pin (floating?).

If you are pushing the same button as you use to enter DFU mode to wake up the device, then this is expected behavior. You either need to use a different button to force DFU mode (if you have more), use buttonless DFU, or expand the DFU button enter check to for instance require the button to be pushed for a certain duration of time for it to enter the DFU mode (or other alternatives).

[Tai]

Hi,

Where can I assign DFU  mode button?

Is DFU mode activated by reset?