SDK 12.3.0 DFU service not work

[JohnathanLyu]

Hi Forums,

I work 51822 custom board.

I try to add Buttonless DFU so I test the "experimental_ble_app_buttonless_dfu" compile is good.

But flash to the board can't find DFU service on NRF Connect tool.

I search online then find most discuss SDK 12.1.0 So I download SDK 12.1.0 build "experimental_ble_app_buttonless_dfu" then flash to board. Magic! It's fine.

I think is strange so try test SDK 12.2.0 . Sadly not worked.

What's different between SDK 12.1.0 ~ SDK 12.2.0 make ble dfu service not work?

Is any suggestion to fix this on SDK 12.3.0?

Thanks for any information.

[bjorn-spockeli]

There is a bootloader settings section that is missing in the linker script, so if you modify the ble_app_buttonless_dfu_gcc_nrf51.ld to the following you should be able to get the buttonless example to run.

/* Linker script to configure memory regions. */

SEARCH_DIR(.)
GROUP(-lgcc -lc -lnosys)

MEMORY
{
  FLASH (rx) : ORIGIN = 0x1b000, LENGTH = 0x24000
  RAM (rwx) :  ORIGIN = 0x20001ff8, LENGTH = 0x6008
  BOOTLOADER_SETTINGS (rw) : ORIGIN = 0x0003F000, LENGTH = 0x1000
}

SECTIONS
{
  .bootloaderSettings(NOLOAD) :
  {

  } > BOOTLOADER_SETTINGS
  
  .fs_data :
  {
    PROVIDE(__start_fs_data = .);
    KEEP(*(.fs_data))
    PROVIDE(__stop_fs_data = .);
  } > RAM
  .pwr_mgmt_data :
  {
    PROVIDE(__start_pwr_mgmt_data = .);
    KEEP(*(.pwr_mgmt_data))
    PROVIDE(__stop_pwr_mgmt_data = .);
  } > RAM
} INSERT AFTER .data;

INCLUDE "nrf5x_common.ld"

[JohnathanLyu]

Hi Bjørn Spockeli: I can use DFU now. But, yes I need send the cmd to my board make it to into DFU mode. Then I need connect to DFUTARG then select my package file to starting DFU.

For now it is work. But have a lousy step.

1. I need connect my board trigger to DFU mode.
2. Dissconnect my board.
3. Connect my board with device name "DFUTARG"
4. press DFU and select my package file.
5. wait finish.
6. disconnect.