Bootloader hex file for PCB prototype development

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1

Hi,

I wanted to test the firmware on nrf52840_breakout board and now have built a PCB for that prototype. I wanted to flash the mdbt50q with the same bootloader such that my firmware can be written through the Arduino IDE. However, when I try to burn the bootloader, I get an error: “…/…/sparkfun_nrf52840_mini_bootloader-0.2.13_s140_6.1.1.zip does not exist”. Please provide me a link to the above file or give me an alternative to put the DFU bootloader on the mdbt50q to use the code of the Adafruit libraries.

Thanks

2

Hi anant3110.

Check [this forum post for the files you’re looking for. :-)](Sparfun nRF52840 Firmware? - SparkFun Electronics Forum)

3

Hi Chris!

So, I uploaded the given bootloader using the command:

adafruit-nrfutil dfu serial --package dfu-package.zip -p /dev/ttyS4 -b 115200

And I received the same error suggesting I am not receiving any acknowledgement from the nrf52840.

Upgrading target on /dev/ttyS4 with DFU package /home/anant3110/Downloads/dfu-package.zip. Flow control is disabled, Dual bank, Touch disabled
Timed out waiting for acknowledgement from device.

Failed to upgrade target. Error is: No data received on serial port. Not able to proceed.
Traceback (most recent call last):
  File "/home/anant3110/.local/lib/python3.6/site-packages/nordicsemi/__main__.py", line 294, in serial
    dfu.dfu_send_images()
  File "/home/anant3110/.local/lib/python3.6/site-packages/nordicsemi/dfu/dfu.py", line 235, in dfu_send_images
    self._dfu_send_image(HexType.APPLICATION, self.manifest.application)
  File "/home/anant3110/.local/lib/python3.6/site-packages/nordicsemi/dfu/dfu.py", line 200, in _dfu_send_image
    application_size)
  File "/home/anant3110/.local/lib/python3.6/site-packages/nordicsemi/dfu/dfu_transport_serial.py", line 179, in send_start_dfu
    self.send_packet(packet)
  File "/home/anant3110/.local/lib/python3.6/site-packages/nordicsemi/dfu/dfu_transport_serial.py", line 243, in send_packet
    ack = self.get_ack_nr()
  File "/home/anant3110/.local/lib/python3.6/site-packages/nordicsemi/dfu/dfu_transport_serial.py", line 282, in get_ack_nr
    raise NordicSemiException("No data received on serial port. Not able to proceed.")
nordicsemi.exceptions.NordicSemiException: No data received on serial port. Not able to proceed.

Possible causes:
- Selected Bootloader version does not match the one on Bluefruit device.
    Please upgrade the Bootloader or select correct version in Tools->Bootloader.
- Baud rate must be 115200, Flow control must be off.
- Target is not in DFU mode. Ground DFU pin and RESET and release both to enter DFU mode.
4

Unfortunately I’m not able to offer assistance on uploading firmware to your PCB but you might Nordic’s DevZone forum to see if they are able to assist you. A link to the DevZone can be found below.

https://devzone.nordicsemi.com/