nRF52810 Bootloader

[Adriana]

Hello, 

I have been following this case to create my own bootloader for nRF52810, but I'm using gcc/Segger Embedded Studio instead of Keil. 

I have modified bootloader_secure_ble from SDK 14.1.0 with the mentioned files and memory settings and tried it successfully over nrf52832 hardware. Now I want to run it in my nrf52810 custom board so I have needed to change  some files:

• ses_nrf52_Vectors.s
• system_nrf52.c

replaced by:

• ses_nrf52810_Vectors.s
• system_nrf52810.c

I have also rebuild micro-ecc library using the files in nrf52nf_armgcc (included in SDK 14.2.0) because nrf52810 has no FPU.

Now I have the following scenario:

• for nrf52810: HardFault at

// Copy the DFU settings out of flash and into a buffer in RAM.
memcpy((void*)&s_dfu_settings, m_dfu_settings_buffer, sizeof(nrf_dfu_settings_t));

• for nrf52832:
  • if I erase all flash, program softdevice and run the bootloader from SeggerEmbeddedStudio I can't see it advertising
  • if I program the softdevice and the previous version of the bootloader  (the one with ses_nrf52_Vectors.s, system_nrf52.c and FPU version of the micro-ecc) and run again my new bootloader from Segger, it works as expected.

As nrf52810 crashes when trying to access m_dfu_settings_buffer I have used nrfjprog and nrfutil to read the bootloader settings page in the programed targets. I can successfully read it when the old version of the bootloader has been flashed before the new version. In the other cases I get:

Bad access at 0xFF000: not enough data to read 4 contifuous bytes

 

I'm not loading any application, only softdevice and bootloader. I'm not completely sure about how Segger manages the bootloader settings page, do I have to merge it with bootloader? 

[bjorn-spockeli]

Adriana: I have created an updated example with Keil, SES and GCC support. The projects should compile out of the box, see this answer or download the zip attached below.

SDK_14.2.0_nRF52810_Secure_BL.zip

[Adriana]

Thanks for the zip, it helped me to realize that my flash_placement was wrong. I've modified it with proper start address values for bootloader_settings_page and mbr_params_page. 

Now I can run it in nrf52810 but can't see any advertisment, the same for nrf52832 and also the same if I compile and run your project. 

So now my application is not crashing, but I have the same problem than before. This is happening also with your project:

• nrf52810: no advertisment
• nrf52832 after erase the chip: no advertisment
• nrf52832 after flashing the old version of the bootloader: works as expected

Still don't understand what's happening with bootloader settings page. 

[Adriana]

Thank you, there was a problem with my hardware. 

[dnguyen2019]

Hi bjorn,

I've issue with bootloader see below:

[dnguyen2019]