RE: DFU from central to peripheral

Vidar Berg — Wed, 25 Jan 2023 13:34:36 GMT

Yes, you will need an application that can support the DFU controller role and forward the FW image(s) to your target device. The DFU protocol requirements are described in the DFU protocol section of the SDK documentation.

But as noted in the post linked below, the SDK does not include any examples for this.

https://devzone.nordicsemi.com/guides/short-range-guides/b/software-development-kit/posts/getting-started-with-nordics-secure-dfu-bootloader#h108sjziaxo3m81rkgr1has5r1d72qtu

RE: DFU from central to peripheral

RoccoBr — Wed, 25 Jan 2023 11:11:00 GMT

if I have understood correctly, the central needs to run a specific firmware to perform the DFU of the peripheral?

RE: DFU from central to peripheral

Vidar Berg — Tue, 05 Jan 2021 14:04:42 GMT

Thank you for the update! It looks like you figured it out.

RE: DFU from central to peripheral

K.Khan — Mon, 04 Jan 2021 12:30:26 GMT

# We have successfully updated the DFU to the target device (nrf52840) from a central Device(nrf52840) connected with a PC via USB(Power) and Jlink-Programmer.

Target device should have the bootloader and softdevice and the main application.

# Flash the Image to the Central device connected with PC:

- Install the nrfutil and nrfjprog

Command to install nrfutil - Use python3.8:

> python38 -m pip install nrfutil

> for nrfjprog install the NRF command-line tool

- run the following commands from python lib to flash the central device. Go the directory

$ cd C:\Users\kashif\AppData\Local\Programs\Python\Python38\Lib\site-packages\pc_ble_driver_py\hex\sd_api_v5

- Erase the central device:

> nrfjprog --eraseall

Erasing user available code and UICR flash areas.

Applying system reset.

- Flash Softdevice:

> nrfjprog --family nRF52 --program s132_nrf52_5.1.0_softdevice.hex

Parsing hex file.

Reading flash area to program to guarantee it is erased.

Checking that the area to write is not protected.

Programming device.

- Flash the connectivity Firmware

> nrfjprog --family nRF52 --program connectivity_4.1.2_usb_with_s132_5.1.0.hex --verify --chiperase

Parsing hex file.

Reading flash area to program to guarantee it is erased.

Checking that the area to write is not protected.

Programming device.

# Initialize the DFU for the target device:

- Go to the directory where the package is availabe

> nrfutil -v -v -v -v dfu ble -ic NRF52 -pkg WSCB_NordicFW_IAR.zip -p COM102 -n "DfuTarg"

**WSCB_NordicFW_IAR.zip**: package to be flashed in the target device

**COM102**: comport device for the central device connected on host PC

**DfuTarg**:target device name.

Thank You!
K.Khan