Secure Serial DFU not working

RE: Secure Serial DFU not working

Susheel Nuguru — Thu, 28 Jun 2018 08:43:32 GMT

Did it work for lower baudrates? I am assuming that you are using hardware flow control in UART. If not, then there is a high possibility of buffer overflows at this high data rate.

RE: Secure Serial DFU not working

Anantha Keshava — Tue, 26 Jun 2018 18:10:18 GMT

I'm facing a similar issue. Here are the steps followed by me:

Environment:

Dev OS: Linux 18.04 LTS

SDK version 15.0.0

Target: nRF52840-Preview DK

I erased the flash: $ nrfjprog -f NRF52 --recover
I flashed the softdevice: $ nrfjprog --program ~/workspace/src/SDK/components/softdevice/s140/hex/s140_nrf52_6.0.0_softdevice.hex --sectorerase --log
I flashed the bootloader settings: $ nrfjprog -f nrf52 --program bl_settings.hex --sectorerase --log --reset
I flashed the secure bootloader uart example: $ nrfjprog -f nrf52 --program _build/nrf52840_xxaa_mbr.hex --sectoranduicrerase --log --reset
Please note that in this step, only changes made by me are:
1. Changed the dfu keys
2. increased the serial baud rate to 1M in ~/workspace/src/SDK/examples/dfu/secure_bootloader/pca10056_uart/config/sdk_config.h
3. This should technically work as the uart example worked with flow control kept ON
I create a sample package based on ble_app_hrs_freertos with nrfutil and try to update this with the DFU serial using the command: $ sudo nrfutil dfu serial -pkg build/ble_app_freertos_gcc_nrf52.zip -p /dev/ttyACM0 -b 1000000
[------------------------------------] 0%

<Hang here>^C

Aborted!
$ sudo nrfutil dfu serial -pkg build/ble_app_freertos_gcc_nrf52.zip -p /dev/ttyACM0 -b 1000000 -fc 1
[------------------------------------] 0%
Traceback (most recent call last):
File "/usr/local/bin/nrfutil", line 11, in <module>
load_entry_point('nrfutil==3.5.1', 'console_scripts', 'nrfutil')()
File "/home/akeshava/.local/lib/python2.7/site-packages/click/core.py", line 722, in __call__
return self.main(*args, **kwargs)
File "/home/akeshava/.local/lib/python2.7/site-packages/click/core.py", line 697, in main
rv = self.invoke(ctx)
File "/home/akeshava/.local/lib/python2.7/site-packages/click/core.py", line 1066, in invoke
return _process_result(sub_ctx.command.invoke(sub_ctx))
File "/home/akeshava/.local/lib/python2.7/site-packages/click/core.py", line 1066, in invoke
return _process_result(sub_ctx.command.invoke(sub_ctx))
File "/home/akeshava/.local/lib/python2.7/site-packages/click/core.py", line 895, in invoke
return ctx.invoke(self.callback, **ctx.params)
File "/home/akeshava/.local/lib/python2.7/site-packages/click/core.py", line 535, in invoke
return callback(*args, **kwargs)
File "/home/akeshava/.local/lib/python2.7/site-packages/nordicsemi/__main__.py", line 745, in serial
do_serial(package, port, connect_delay, flow_control, packet_receipt_notification, baud_rate, True)
File "/home/akeshava/.local/lib/python2.7/site-packages/nordicsemi/__main__.py", line 680, in do_serial
dfu.dfu_send_images()
File "/home/akeshava/.local/lib/python2.7/site-packages/nordicsemi/dfu/dfu.py", line 129, in dfu_send_images
self._dfu_send_image(self.manifest.application)
File "/home/akeshava/.local/lib/python2.7/site-packages/nordicsemi/dfu/dfu.py", line 90, in _dfu_send_image
self.dfu_transport.open()
File "/home/akeshava/.local/lib/python2.7/site-packages/nordicsemi/dfu/dfu_transport_serial.py", line 206, in open
if self.__ping() == True:
File "/home/akeshava/.local/lib/python2.7/site-packages/nordicsemi/dfu/dfu_transport_serial.py", line 321, in __ping
resp = self.dfu_adapter.get_message() # Receive raw reponse to check return code
File "/home/akeshava/.local/lib/python2.7/site-packages/nordicsemi/dfu/dfu_transport_serial.py", line 133, in get_message
byte = self.serial_port.read(1)
File "/home/akeshava/.local/lib/python2.7/site-packages/serial/serialposix.py", line 501, in read
'device reports readiness to read but returned no data '
serial.serialutil.SerialException: device reports readiness to read but returned no data (device disconnected or multiple access on port?)
Does this mean that we can't use DFU over serial at 1M baud rate?

RE: Secure Serial DFU not working

Einar Thorsrud — Tue, 12 Jun 2018 08:44:03 GMT

Hi,

Which exact OS do you use? Do you also have a /dev/ttyACMx device that represent the serial port?

RE: Secure Serial DFU not working

Rok Cesnovar — Mon, 11 Jun 2018 13:24:33 GMT

I have disabled the HW flow control and I am now getting this error:

NordicSemiException: Unexpected Executed OP_CODE.
Expected: 0x03 Received: 0x60

Can you guys give me any pointers as to what is wrong here. I am using the _debug project and the ble_app_buttonless_duf_without_bonds zip file.

RE: Secure Serial DFU not working

Rok Cesnovar — Mon, 11 Jun 2018 10:44:56 GMT

Thanks Einar! This got me a bit further now. LED1 and 4 are lit, but I am now gettint the following error:

raise NordicSemiException('Did not receive checksum response from DFU target. '
pc_ble_driver_py.exceptions.NordicSemiException: Did not receive checksum response from DFU target. If MSD is enabled on the target device, try to disable it ref. wiki.segger.com/index.php

RE: Secure Serial DFU not working

Einar Thorsrud — Mon, 11 Jun 2018 09:09:59 GMT

Hi,

Are LED 1 and LED 4 on the DK lit to indicate that the bootloader is in DFU mode? If not, have you remembered to flash the SoftDevice? It is needed by the bootloader in SDK 14 even if it is not using BLE. The following set of commands should work out of the box with the serial DFU example images from SDK 14.0.0 (<SDK 14.0.0>\examples\dfu\secure_dfu_test_images\serial\nrf52832):

λ nrfjprog.exe -e
Erasing user available code and UICR flash areas.
Applying system reset.

λ nrfjprog.exe --program softdevice_s132.hex
Parsing hex file.
Reading flash area to program to guarantee it is erased.
Checking that the area to write is not protected.
Programming device.

λ nrfjprog.exe --program bootloader_secure_serial_debug_without_bonds_s132.hex --reset
Parsing hex file.
Reading flash area to program to guarantee it is erased.
Checking that the area to write is not protected.
Programming device.
Applying system reset.
Run.

λ nrfutil dfu serial -pkg ble_app_buttonless_dfu_without_bonds_s132.zip -p COM25 -b 115200 -fc 1
  [####################################]  100%
Device programmed.