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TODO: Implement Candlelight 2.5 protocol

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#2,016 0 則留言 0 個 reaction 已指派 0 人 在 GitHub 檢視

還沒有人認領這個 Issue。

評估

難度
5/5
預估耗時
一週以上
新手友好度
35/100
Issue 類型
功能
描述清晰度
基本清楚
活躍度
停滯
技術堆疊
python

研究方向

閱讀連結 URL 中詳細的 CANable 2.5 協定描述,並研究 issue 中提到的 Python 示範。接著找出 python-can 中現有的協定整合點,並根據這些參考資料定義實作範圍;當 PythonCAN 支援改進後的 Candlelight 協定及其所描述的功能時,即視為完成。

由索引模型根據 Issue 內容生成。

描述

enhancement

The legacy gs_usb protocol from Geschwister Schneider is obsolete now.
It has several misdesigns.

CAN FD packets are always transferred as 80 bytes over USB, even if the CAN packet has only one data byte.
This misdesign limits the USB throughput unnecessarily.
On a CAN bus with very much traffic you may get USB buffer overflows.

Additionally the legacy Geschwiser Schneider protocol echoes all Tx packets back over USB.
The 80 bytes are sent from the adapter back to the host computer, again limiting the USB throughput unnecessarily.

And there are several bugs in the legacy Candlelight firmware.
The automatic driver installation does not work on Windows because of bugs.

And there is no legacy Candlelight firmware for the STM32G431 processor with CAN FD support available, although this is standard today.

The new open source CANable 2.5 firmware fixes all these issues, optimizes the USB throughput to the maximum that is possible over a slow Full Speed USB connection and adds lots of new features.

The CANable 2.5 firmware has been tested successfully up to 10 Megabud CAN FD.

The new CANable 2.5 firmware (which exists as Candlelight and Slcan version) implements an improved Candlelight protocol and adds new features like filters, measuring bus load,....

So implementing the new CANable 2.5 protocol into PythonCAN would be a great benefit for all users.

Read the detailed description here:
https://netcult.ch/elmue/CANable%20Firmware%20Update

In this project you also find a Python demo that you can integrate into PythonCAN.

Image Image
主要語言
Python
星號
1.6k
分支
700
PR 合併指標
30 天內沒有已合併 PR

環境準備

從這裡開始

  1. 先讀完整個 Issue,再讀專案的貢獻指南。
  2. 在 Issue 下留言說明你要接手 —— 這能避免兩個人做同樣的事。
  3. Fork 儲存庫,在一個分支上完成修改。
  4. 送出 Pull Request,並在描述裡引用這個 Issue 編號。

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