bootloader problem on example from SDK11

[Jorge]

Hi all,

I have a board with old code, it has a bootloader + sofdevice 110 + application all from SDK7 and I want to upgrade it via serial single bank DFU, to the SDK11 using SD130.

I already made the changes on the app and bootloader. And if i load them using the nRFgo Studio it works fine. But when I try to load via serial dfu it doesn't work.

My steps are:

1- merge the BL130 + SD130

2- merge the result of 1 step with app130

3- load the merged file using serial dfu

The problem is that it doesn't let me load any of the merged files. My hint is that is something on the bootloader that I am missing, since every combination that contains the bootloader doesn't download. But the ones without the bootloader are successfully downloaded.

Is it not possible to upgrade the bootloader from an old SDK to a new one?

I was also lookign to the differences on the code from the two Bootloaders and they don't seem too different, so I am not sure what can be causing this.

If someone has some idea It would be appreciated.

Edit #1

I have made some tests and found that this was a problem with the bootloader example of SDK11.

I can download the bootloader image that is already on the "hci_dfu_send_hex" folder, but if I compile the bootloader example I am not able to load it to the board?

Should they be different? I need to do some customization on the bootloader code so I cannot use the one that works.

[Jorge]

I have the same memory starts and sizes on both bootloaders, so it doesn't seem to be this error.

[Jorge]

I was making more tests and I can load the default bootloaders from SDK7, 8 and 10. But cannot load the default one from SDK11. Is there any major difference between this bootloaders?

[Hung Bui]

Hi Jorge,

Please try to test without merging anything. Please simply generate the DFU package .zip file with the softdevice and the bootloader in SDK v11 and test updating. Let me know what you see in the log.

[Jorge]

I have tried to load only the bootloader but it doesn't accept. I don't have a log on the tool that I am using. The tool just check what I am trying to load (it sees the bootloader), and then says that the "old" bootloader is not accepting the data, so it gives a timeout error.

I was just wandering what could be the difference between the two bootloaders (SDK10 and 10), I saw that there are some minor differences because on the ble_stack_init.

I also asked another related question (here) where I tried the test image "dfu_test_bootloader_b_hci_s130.hex" and I was successful on loading it to the board but I am not sure from which project this is.

[Jorge]

I have loaded the softdevice + bootloader (SDK11) using the nRFgo Studio. Then I tried to load the same bootloader using the tool and I was not successful. I was successful on loading via the serial dfu the softdevice, my application, the "dfu_test_bootloader_b_hci_s130.hex" and older bootloaders.

I am using the hex file on the folder "_build" from the bootloader project. Is this the correct one to use?