The Buttonless DFU Template Application is not working on a custom board

[Vu]

Hi,

I am currently working on a custom product that uses module BMD-300 from u-blox, which has nrf52382 chip in it. My application works fine and now I want to integrate the Secure DFU function into it. I programmed the board with the DFU test image sd_s132_bootloader_buttonless_with_setting_page_dfu_secure_ble_debug_without_bonds.hex but I could not see it advertising when I scan for devices on nrf Connect. Does anyone know what problem could cause it to not advertising? I am using sdk v15.0.0.

Thank you in advance.

[Edvin]

Does this mean that sd_ble_gap_conn_param_update() returns something other than 0? If so, what does it return?

Did you do any changes to the bootloader project other than the pin configurations to match your custom PCB?

Have you tried to do a sniffer trace? I suspect that the nRF just stops responding if it is in fact a hardfault.

Have you possibly done any changes to the files that are common in the SDK? Can you try to unzip a new SDK, and copy paste the bootloader project into this SDK? Does the issue still occur?

What was the connection parameters that the phone or PC wants in the connection parameter update? A sniffer trace will show this, or you can try to debug, and look at the p_new_conn_params.

So:

1: Can you try with an unmodified SDK?

2: What is the p_new_conn_params in the send_update_request()? (and what is it when you connect with the iPhone?)

3: What does sd_ble_gap_conn_param_update() return?

[Vu]

The p_new_conn_params is:

When I connect with iPhone the send_update_request() is never called as it never reached my breakpoint there.

sd_ble_gap_conn_param_update() does not return as the hardfault is at 0x2dd76:

[Vu]

I want to clarify again that this has nothing with the bootloader project, the custom board only contains my own application and the soft device. The only file I change in SDK for my application project is the bsp.c in sdk\component subfolder.

[Edvin]

Oh, I am sorry. I thought the HardFault was in when the bootloader was running, but I see, it is in the application. I didn't see the comment that you took out the bootloader.

Can you try to turn off optimization and check what function call that is the last one that is called? Are you sure sd_ble_gap_conn_param_update() is called? Because the address that it refers to looks like it is outside the softdevice. You are using s132v6.0.0, right? Can you confirm that sd_ble_gap_conn_param() is called? If not, what is the last call that is called before the hardfault?

I can't say that I have seen this message before:

"The processor has escalated a configurable-priority exception to HardFault. Exception occured at ..." Where does this message come from?

Are there any functions that returns something other than NRF_SUCCESS? Have you removed  any of the APP_ERROR_CHECK(); calls that are softdevice related? Does the log say anything other that suggests that something is wrong? Can you send a copy of the log?

Is there any way for me to reproduce this?

Best regards,

Edvin

[Vu]

Can I send you my project? I will take out everything except the BLE part. It's for module BMD-300 from u-blox, but I guess you can try it with any Nordic nrf52382 kit.