hardbyte / hardbyte/python-can

SeeedBus: Allow setting hardware filter/mask during Bus Init

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#1,995 2 bình luận 0 reaction 0 người được giao Xem trên GitHub
enhancement
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Python
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Mô tả

## Main Problem
I don't like that the SeeedBus interface does not allow for the configuration of the hardware acceptance filter and mask during the bus initialization.

My use case involves a bootloader flasher client that communicates with a device over the CAN bus. The client sends a message with one CAN ID and needs to listen only for a response on another specific CAN ID. To achieve this efficiently, I need to use the hardware filter. The current implementation forces me to create the bus object, then manually change its internal attributes (filter_id, mask_id), and then re-call the internal init_frame() method. This workflow is not intuitive and feels like a workaround.

## Current Alternative
The only alternative at the moment is to manually re-configure the bus after it has been created. This involves the following steps:

```Python

import struct

# 1. Create the bus with default (disabled) filters
bus = can.interface.Bus(interface='seeedstudio', channel='/dev/ttyUSB0')

# 2. Manually overwrite the internal attributes
bus.filter_id = struct.pack('

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