Support code python librairie nrfutil

[Lora]

Hi,

I am working on the port of the nrfutil library of python -> C and I am looking for a support to understand the python code of the nrfutil library please.

Can you help me please.

Best Regards.

[tesc]

Hi,

Why would you do that, what is the use case? You should be able to use the python version programmatically using the command line interface. I am trying to understand what you need in case there are better options that may save you for a lot of work. What is your end goal, what problem are you trying to solve?

Regards,
Terje

[Lora]

I am working on a communication project ble, is among the objectives of the project is the portage of the function ble in the main.py C is a project a little critical that requires less space of the memory c is why I am carrying a C or assembler

that's the function I need

github.com/.../dfu_transport_ble.py

def send_init_packet(self, init_packet):
def try_to_recover():
if response['offset'] == 0 or response['offset'] > len(init_packet):
# There is no init packet or present init packet is too long.
return False

expected_crc = (binascii.crc32(init_packet[:response['offset']]) & 0xFFFFFFFF)

if expected_crc != response['crc']:
# Present init packet is invalid.
return False

if len(init_packet) > response['offset']:
# Send missing part.
try:
self.__stream_data(data = init_packet[response['offset']:],
crc = expected_crc,
offset = response['offset'])
except ValidationException:
return False

self.__execute()
return True

response = self.__select_command()
assert len(init_packet) <= response['max_size'], 'Init command is too long'

if try_to_recover():
return

for r in range(DfuTransportBle.RETRIES_NUMBER):
try:
self.__create_command(len(init_packet))
self.__stream_data(data=init_packet)
self.__execute()
except ValidationException:
pass
break
else:
raise NordicSemiException("Failed to send init packet")