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mdabrowski1990 authored Oct 29, 2024
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Expand Up @@ -21,25 +21,27 @@ If you want to become a contributor, please read `CONTRIBUTING.md`_ file.

Why another UDS package?
------------------------
There are a few already existing python packages to handle UDS protocol,
so you might wonder why would you consider using this one?
There are a few already existing python packages to handle UDS protocol, so you might wonder why would you consider
using this one?

This package is meant to support **multiple buses** (including CAN, LIN, Ethernet, K-Line, FlexRay) and **multiple
bus managers** (e.g. `python-can`_).
Additionally, it handles both communication nodes (client and server), and contains detailed configuration to fully
control all timing and transmission parameters.
Additionally, it handles both communication nodes (client and server), decoding monitored UDS communication,
and contains detailed configuration to fully control all timing and transmission parameters.

Thanks to all these features, this package can have multiple use-cases, including:

- simple send-receive messages to/from any network
- simple send-receive packets/messages to/from any network
- comprehensive node simulations
- testing of UDS protocol communication implementation
- testing of UDS protocol communication implementation - either on client (diagnostic tester / ECU) or server (ECU) side
- sniffing (and decoding) UDS communication

Unfortunately, all previously mentioned plans make the project a huge effort and at the time of writing,
the implementation process of these features is still ongoing (and probably the status will stay the same for at least
a couple more years).
On the other hand, the architecture to support all these features is already designed and some of the features
are already implemented with others defined or planned.
Unfortunately, all previously mentioned plans make the project quite huge.
At the time of writing, the implementation process of these features is still ongoing (and probably the development
would slowly progress over at least a few more years, unless more people get engaged in the project and/or
more sponsors are found).
On the other hand, the architecture to support all these features is already designed and some of them are already
implemented with others defined or planned.

To check the current implementation status, visit:

Expand All @@ -55,26 +57,51 @@ python-udsoncan
Link: https://github.com/pylessard/python-udsoncan

- pros:
- comprehensive documentation
- handlers for multiple diagnostic services is implemented

- comprehensive documentation -
https://udsoncan.readthedocs.io/en/latest/index.html
- maintained with active community - https://udsoncan.readthedocs.io/en/latest/udsoncan/questions_answers.html
- various connection types are supported -
https://udsoncan.readthedocs.io/en/latest/udsoncan/connection.html#available-connections
- CAN bus fully supported with possibility to extension for other buses (requires custom code)
- possibility to configure all transmission parameters for CAN using can-isotp package -
https://can-isotp.readthedocs.io/en/latest/isotp/implementation.html#
- handlers for multiple diagnostic services are implemented -
https://udsoncan.readthedocs.io/en/latest/udsoncan/services.html
- positive and negatives scenarios are handled - https://udsoncan.readthedocs.io/en/latest/udsoncan/exceptions.html
- control over CAN Network parameters (N_As, N_Ar, N_Bs, N_Br, N_Cs, N_Cr) via can-isotp package -
https://can-isotp.readthedocs.io/en/latest/isotp/socket.html
https://can-isotp.readthedocs.io/en/latest/isotp/implementation.html
- possibility to inject some errors on Transport/Network layer -
https://udsoncan.readthedocs.io/en/latest/udsoncan/client.html#overriding-the-output

- cons:
- only positive use case scenarios (where communication is in line with UDS standard) are supported
- only CAN bus is supported
- only Client side communication can be handled
- limited communication parameters configuration

- no support for full-duplex communication (sending and receiving at the same time)
- only Client side communication is implemented - https://udsoncan.readthedocs.io/en/latest/udsoncan/client.html#


python-uds
''''''''''
Link: https://github.com/richClubb/python-uds

- pros:
- CAN and LIN buses are supported

- CAN and LIN buses are supported

- cons:
- modest documentation
- only a few communication interfaces are supported
- only Client side communication can be handled
- limited communication parameters configuration

- very modest documentation - https://python-uds.readthedocs.io/en/latest/
- is not maintained with the last release in March 2019 - https://pypi.org/project/python-uds/
- only a few communication interfaces (I have only found examples with python-can) are supported -
https://python-uds.readthedocs.io/en/latest/interface.html
- no support for full-duplex communication (sending and receiving at the same time)
- only Client side communication is implemented
- limited communication parameters configuration - https://python-uds.readthedocs.io/en/latest/configuration.html
- no option for injecting errors on Transport/Network layer, e.g.

- Overflow / Wait value of Flow Status (parameter of Flow Control packet)
- CAN packets in wrong order (e.g. incorrect Sequence Numbers order in Consecutive Frames)


Contact
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