Stuck at DFU bootloader after flashing

RE: Stuck at DFU bootloader after flashing

PauDC — Wed, 14 Apr 2021 09:57:53 GMT

Hi Amanda,

I didn't know that setting existed. I followed Getting started with Nordic's Secure DFU bootloader, a step by step guide for my bootloader.

NRF_BL_DFU_ENTER_METHOD_BUTTON was on so I turned it off.

Just next to this setting there was NRF_BL_DFU_ENTER_METHOD_BUTTON_PIN set to P0.16 which in my new board this is used for the PWM. So even though I turned the previous setting off I moved this to a free pin.

At first this didn't work, so I started looking the following settings and found that NRF_BL_DFU_ENTER_METHOD_BUTTONLESS was off. Since my board doesn't have any buttons and I update the firmware via DFU I turned this on.

After these two changes it started working.

Thanks Amanda,

Best regards,

Pau

RE: Stuck at DFU bootloader after flashing

Amanda Hsieh — Wed, 14 Apr 2021 07:39:35 GMT

Hi Pau,

I the log, we see: 00> <debug> app: DFU mode requested via button.

Maybe you just need to disable the Configuration parameters -> NRF_BL_DFU_ENTER_METHOD_BUTTON setting in the bootloader

Regarding the reset pin, it is important that it can be set by both the application and bootloader. This is easy to forget.

-Amanda H.

RE: Stuck at DFU bootloader after flashing

PauDC — Fri, 09 Apr 2021 08:28:09 GMT

Hello Amanda,
Thanks for your reply.

I'm not sure how to perform what you suggested since I've never debugged with a bootloader. Do you know any guide on how to do what you suggested?

Even though I'm unsure how to do it. I tried the following:
1. Successfully compiled the debug bootloader using SES.
2. Erased everything on my board.
3. Turned on the RTT viewer and connected the device.
4. Ran my script changing the bootloader with the debug one and didn't flash my firmware and the bootloader settings (because as far as I know, once you perform a DFU the Bootloader settings page is created automatically)
5. Nothing happened on the RTT viewer.
6. Couldn't find the DfuTarg device in the nrfConnect app.
7. So I went to nRFgo Studio to see if anything was flashed. So I clicked Refresh.
8. At this moment the RTT viewer started printing things.
9. So I uploaded the firmware via DFU successfully. At the end of the process the device still appears as DfuTarg.

I'm attaching in a plain text file what I saw in the RTT screen. Is this what you asked for?

devzone.nordicsemi.com/.../booloader_5F00_debug_5F00_log.txt
Edit: I see that in line 3968 it says: 00> <info> app: No firmware to activate.
Best regards,
Pau

RE: Stuck at DFU bootloader after flashing

Amanda Hsieh — Thu, 08 Apr 2021 13:08:20 GMT

Hi Pau,

The process looks correct. You could use the secure_bootloader_pca10040_s132_ble_debug version and check the debug info.

Are you able to provide the debug log? Thanks.

-Amanda H.