Firmware update using TFTP

Question

Hi, I am attempting to do firmware update using a WIZ550io shield on a Nordic Semiconductor nRF52 Development Kit. To do this, I try to follow the example here: WIZBLE510_ETHERNET/nRF5_SDK_12.2.0_WIZBLE510_TFTP_DFU_Release1 at master · Wiznet/WIZBLE510_ETHERNET · GitHub I am able to connect to the TFTP server and download a file to the development kit. The issue is that the example does not state how the firmware file should be generated and uploaded to be compatible with Wiznet’s implementation of DFU. I have tried with the files provided with Nordic’s SDK that Wiznet’s example is built upon, but I get an error saying that the downloaded application is not valid after it is downloaded. The README file in the example I link to, only shows a picture of a “firmware.bin” file, but does not provide information about how to make this file, what it should contain and how its settings should be. Does anyone here know how this should be done?

mason · Answer

Hi, I’m Mason for WIZnet. What do you use a complier? If your compiler does not output the .bin file, you have to convert .hex to a .bin file. I recommend Segger’s JFlash segger.com SEGGER - The Embedded Experts - Downloads Download the latest SEGGER trial versions, eval packages and user manuals! Execute JFlash. And open your .hex file. And click “File → the save data file as”. You can change the file format to bin. Thank you.

mason · Answer

Hi, I attached “firmware.bin”. The firmware.bin file is SDK 12.2 ble_app_hrs project. Please test the bin file. firmware.bin (31.1 KB) If an error occurs, Please follow the steps below. Write the SoftDevice V3.1.0 Build and Write TFTP Bootloader Copy & Paste the firmware.bin in the tftp server Thank you.

jtg · Answer

I have one extra question: Is there a similar example for nRF52840 or any plans about making one?

mason · Answer

I am glad that you have successfully tested it. There is no additional plan yet. But if you tell me other example you want, We will review it.

jtg · Answer

It would be really great with a similar example to the one you have already created, but for nRF52840 using SDK 14.2. I have been able to establish connection from a nRF52840 and WIZ5500io moduoe to the TFTP server and seemingly download the file, but application is not running. When reading the memory address where the application should be placed it only contains the letters “meout 5” followed by zeros, which suggests the connection timeouts and not actually downloads anything. An example for how to do this properly would be much appreciated. Update: Using Wireshark I’m able to see that all data is transferred and ACK’ed as it should. The problem must be on the firmware side when copying the data to the application region.