Problems in transfer of a firmware image

RE: Problems in transfer of a firmware image

lolifrog — Tue, 09 Mar 2021 03:26:22 GMT

I have successfully transferred the firmware image.Now I am glad to share my experience.

Background

1.Both central master and peripheral are nRF52840 devices. SDK: nRF5_SDK_16.0.0

2.Init packet and firmware image are stored in central master.

3.Central master can find DFU service and its characteristics from the peripheral as below.

If you can find DFU service but can't find any characteristics, maybe you need to change the characteristic UUID(128 bits) in your application and bootloader programs to ensure that both service and characteristics are based on the same 128 bits UUID.

Prepare to enter bootLoader

1.Enable indications.

You can refer to this : How to enable indications

2.Sending 0x01 to Buttonless DFU without bonds characteristic(0x03).The peripheral will restart and MAC address + 1 if entering bootloader.

Transfer init packet and firmware image

1.Transfer init packet

You can refer to How to transfer init packet and Transfer of an init packet

.dat file will be transfered.

2.Transfer firmware image

You can refer to Transfer of a firmware image

.bin file will be transfered.The flow chart is as follows

tips:

1.Enable notification to check return code.

2. .bin file size is bigger than the maximum object size.Therefore,if the image size is 10 kB and the maximum object size is 4 kB, 3 data objects must be transferred.

RE: Problems in transfer of a firmware image

Jørgen Holmefjord — Mon, 08 Mar 2021 09:28:25 GMT

You can either post it here or create a new thread with a more relevant topic, where you describe your process and include the project/code.

RE: Problems in transfer of a firmware image

lolifrog — Mon, 08 Mar 2021 09:25:05 GMT

Yes, I'm glad to share the experience and where can I post it?

RE: Problems in transfer of a firmware image

Jørgen Holmefjord — Mon, 08 Mar 2021 08:57:19 GMT

I'm glad to hear! Feel free to post your solution if it is not confidential. I'm sure it would be helpful to a lot of other users, since Nordic does not provide any solution for this as of today.

RE: Problems in transfer of a firmware image

lolifrog — Mon, 08 Mar 2021 07:43:07 GMT

Thanks for your help, it works.

RE: Problems in transfer of a firmware image

Jørgen Holmefjord — Tue, 02 Mar 2021 14:51:13 GMT

[quote user="lolifrog"]I guess I need to create another object to send the rest .bin file? I wonder if I need to send create command(01-02-00-10-00-00) every time before sending firmware image(.bin file)?[/quote]

Yes, that should work.

I would recommend you to capture a sniffer trace of the DFU process with the same ZIP package from a mobile phone running nRF Connect or nRF Toolbox applications. Then you can see the exact commands used by our implementation, and replicate this in your own DFU central implementation.

RE: Problems in transfer of a firmware image

lolifrog — Tue, 23 Feb 2021 06:53:37 GMT

Hi Jørgen,

[quote userid="14926" url="~/f/nordic-q-a/71858/problems-in-transfer-of-a-firmware-image/295678#295678"]Are you implementing a BLE central for performing DFU between two nRF52840 devices?[/quote]

Yes I want to send firmware image from central to peripheral by BLE, both of them are nRF52840 devices.

[quote userid="14926" url="~/f/nordic-q-a/71858/problems-in-transfer-of-a-firmware-image/295678#295678"]Which SDK version are you using?[/quote]

nRF5_SDK_16.0.0

[quote userid="14926" url="~/f/nordic-q-a/71858/problems-in-transfer-of-a-firmware-image/295678#295678"]Do you have much free space in the device?[/quote]

After I send select command (0x06 0x02), I receive 60-06-01-00-10-00-00-00-00-00-00-00-00-00-00.I know the maximum object size is 4kB (0x1000 bytes). However,my firmware image(.bin file) is about 47kB, if I send all 47kB file and 0x03 to the peripheral, I will receive 60-03-01-f0-0f-00-00-66-ee-47-e7. I guess I need to create another object to send the rest .bin file? I wonder if I need to send create command(01-02-00-10-00-00) every time before sending firmware image(.bin file)?

[quote userid="14926" url="~/f/nordic-q-a/71858/problems-in-transfer-of-a-firmware-image/295678#295678"]Do you mean .bin file? You should send the binary data in pieces as described in the MSC.[/quote]

Yes,I mean .bin file.

Best regards,

Steven

RE: Problems in transfer of a firmware image

Jørgen Holmefjord — Mon, 22 Feb 2021 16:37:47 GMT

Hi,

Are you implementing a BLE central for performing DFU between two nRF52840 devices? Which SDK version are you using?

The Message sequence charts for Secure DFU over BLE can be found in the SDK documentation. If you get a response that the object cannot be created due to it being too big, there is most likely not enough free space in flash to store the object. Do you have much free space in the device?

[quote user=""]2.If I get a correct return after sending create command, Which file should I send?(I guess only .bat flie?) [/quote]

Do you mean .bin file? You should send the binary data in pieces as described in the MSC.

Best regards,
Jørgen