Hi devzone,
I learnt DFU through USB by performing the following steps:
1. build and run "secure bootloader usb" project with segger through J-link port J2.
2. flash a signed zip package using nrfutil through usb port J3.
And it was successful.
However if I replace step one with
Segger interface -> Target -> "connect J-link" and then "Erase all" and then "Download File -> Download intel Hex File" and select the hex file the project had built and flash onto the board then reset J-link,
Then do step 2 (nrfutil zip file through J3)
It cannot flash. giving the following errors:
Traceback (most recent call last):
File "/usr/local/lib/python3.8/site-packages/serial/serialposix.py", line 265, in open
self.fd = os.open(self.portstr, os.O_RDWR | os.O_NOCTTY | os.O_NONBLOCK)
FileNotFoundError: [Errno 2] No such file or directory: '/dev/ttyACM0'
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/usr/local/lib/python3.8/site-packages/nordicsemi/dfu/dfu_transport_serial.py", line 198, in open
self.serial_port = Serial(port=self.com_port,
File "/usr/local/lib/python3.8/site-packages/serial/serialutil.py", line 240, in __init__
self.open()
File "/usr/local/lib/python3.8/site-packages/serial/serialposix.py", line 268, in open
raise SerialException(msg.errno, "could not open port {}: {}".format(self._port, msg))
serial.serialutil.SerialException: [Errno 2] could not open port /dev/ttyACM0: [Errno 2] No such file or directory: '/dev/ttyACM0'
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/usr/local/bin/nrfutil", line 11, in <module>
load_entry_point('nrfutil==6.0.1', 'console_scripts', 'nrfutil')()
File "/usr/local/lib/python3.8/site-packages/click/core.py", line 764, in __call__
return self.main(*args, **kwargs)
File "/usr/local/lib/python3.8/site-packages/click/core.py", line 717, in main
rv = self.invoke(ctx)
File "/usr/local/lib/python3.8/site-packages/click/core.py", line 1137, in invoke
return _process_result(sub_ctx.command.invoke(sub_ctx))
File "/usr/local/lib/python3.8/site-packages/click/core.py", line 1137, in invoke
return _process_result(sub_ctx.command.invoke(sub_ctx))
File "/usr/local/lib/python3.8/site-packages/click/core.py", line 956, in invoke
return ctx.invoke(self.callback, **ctx.params)
File "/usr/local/lib/python3.8/site-packages/click/core.py", line 555, in invoke
return callback(*args, **kwargs)
File "/usr/local/lib/python3.8/site-packages/nordicsemi/__main__.py", line 993, in usb_serial
do_serial(package, port, connect_delay, flow_control, packet_receipt_notification, baud_rate, serial_number, False,
File "/usr/local/lib/python3.8/site-packages/nordicsemi/__main__.py", line 949, in do_serial
dfu.dfu_send_images()
File "/usr/local/lib/python3.8/site-packages/nordicsemi/dfu/dfu.py", line 127, in dfu_send_images
self._dfu_send_image(self.manifest.application)
File "/usr/local/lib/python3.8/site-packages/nordicsemi/dfu/dfu.py", line 88, in _dfu_send_image
self.dfu_transport.open()
File "/usr/local/lib/python3.8/site-packages/nordicsemi/dfu/dfu_transport_serial.py", line 202, in open
raise NordicSemiException("Serial port could not be opened on {0}"
pc_ble_driver_py.exceptions.NordicSemiException: Serial port could not be opened on /dev/ttyACM0. Reason: could not open port /dev/ttyACM0: [Errno 2] No such file or directory: '/dev/ttyACM0'
Symptom:
after Build and run command, LED1 and 3 are lit, DFU works.
After hex download, no LEDs are lit. DFU doesn't work. I tried reset button, reset button + button 4 and power cycle to no avail.
The hex are built with the same key.
How to do secure bootloader step one through hex download with SEGGER? Is nrfjprog the only alternative?
PS: The reason I have to use hex download is I have a bootloader spliced with bl setting and application that i want to download to the chip, so with one flash i have a functional app running, also give gateway for future DFU.
