Application board 3.0 bootloader

[Hlopes]

Hi guys,

I've made a mistake and erased the bootloader from my brand new Application Board 3.0 with J-link while I was trying to debug my firmware. Could you please help me with this? Is there a .bin or .hex file in COINES SDK? How do I flash the bootloader?

Thanks!

Hugo

[Minhwan]

Hi Hlopes, 

There is bootloader update in \COINES\v2.6.0\firmware\app3.0\bootloader_update

Thank you. 

[jabezwinston · Accepted solution]

As of COINES v2.6,  only bootloader update package is available. Hence, no way to restore the board to original state. You can take a flash memory image of another Application Board 3.0 and apply on yours.

I have created a HEX image of my APP3.0 board memory - Bosch_Sensortec_APP3.0_board_image.hex 

• Install nRF-Command-Line-Tools (for nrfjprog)
• Download Bosch_Sensortec_APP3.0_board_image.hex (Ctrl + S from browser)
• Connect Application Board 3.0 with JLink
• Run the below commands to recover the board

# Write APP3.0 board image
nrfjprog -f nrf52 --program Bosch_Sensortec_APP3.0_board_image.hex --sectorerase --verify

# Write Bootloader start address 0xF0000 to UICR.BOOTLOADERADDR(0x10001014)
nrfjprog -f nrf52 --memwr 0x10001014 --val 0x000F0000

[Hlopes]

All done!

Thank you so much! 

[Jar444]

Is there a way to do this without jlink. I just have a usb connection and accidentally erased the firmware when loading a example to memory. I used target=flash instaed of target=ram. Thank you for your help in advance.