Is it possible to add serial bootloader functionality to otap bootloader?

[joachimk]

Hi,

i have created a wireless project which uses ble + thread in concurence.

We need to update the firmware over-the-air, so i have programmed otap bootloader into the device (kw41z).

But we also want to update the firmware via a serial connection.

Is it possible to do so? Is there any document about this?

Thanks in advance.

[joachimk]

Hi,

the document was really helpful! Thanks!

Is there any recommended Serial FlashTool for Windows?

Thanks in advance.

[jorge_a_vazquez]

Hi Joachim Keh

So, basically you need two bootloaders; we provide with these two bootloaders in the connectivity software, you can find them in the path: {MKW41Z_ConnSw_1.0.2}\boards\frdmkw41z\wireless_examples\framework. Problem here is that they cannot coexist, because both of them are implemented to work as they were the only bootloader working. So if you want to use both of them, you need to combine this two bootloaders.

You can check section 3.21.Bootloader of the Connectivity Framework Reference Manual located in {MKW41Z_ConnSw_1.0.2}\docs\wireless\Common.

Hope this information helps you
Have a great day,
Jorge Alcala

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[joachimk]

Hi,

I tried flashing firmware via serial port with ./fsci_bootloader.py but it always breaks at 44.81% (-> gHandleBootError_d();) which resets the MCU.

Do you have any idea what is going wrong?

Additional info: OTAP works fine.

Thanks in advance.

[joachimk]

Update / Solution:

-> Using .bin (raw binary) file instead of .srec file solves the problem.