https://wiki.jw-tech.eu/index.php?action=history&feed=atom&title=WSAL17075_%E2%80%93_2-CH_CAN_FD_HAT%2FenWSAL17075 – 2-CH CAN FD HAT/en - Versionsgeschichte2026-10-23T23:32:00ZVersionsgeschichte dieser Seite in JW Tech WikiMediaWiki 1.43.9https://wiki.jw-tech.eu/index.php?title=WSAL17075_%E2%80%93_2-CH_CAN_FD_HAT/en&diff=1702&oldid=prevJWTechPublisher: Freigegebene technische Dokumentation veröffentlicht; Text-only und noindex2026-09-05T22:35:07Z<p>Freigegebene technische Dokumentation veröffentlicht; Text-only und noindex</p>
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'''Documentation notice:''' This technical documentation was independently rewritten from an archived supplier source. Check technical details and commands against the product version and manufacturer documentation before use.<br />
<br />
== Summary ==<br />
Technical overview of the Waveshare 2-CH CAN FD HAT (WSAL17075): a two-channel, electrically isolated CAN FD module for Raspberry Pi using an MCP2518FD controller with SPI connection.<br />
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== Related products at JW Tech ==<br />
* [https://shop.jw-tech.eu/p/WSAL17075 WSAL17075 – 2-Channel Isolated CAN FD Expansion HAT for Raspberry Pi, Multi Protections]<br />
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== Technical overview ==<br />
* Supported boards: Raspberry Pi Zero/Zero W/Zero WH/2B/3B/3B+/4B.<br />
* CAN controller: MCP2518FD; supports classic CAN2.0 and CAN FD frames, standard and extended frames, and remote frames.<br />
* Arbitration bit rate up to 1 Mbit/s; data bit rate can exceed the 1 Mbit/s limit of CAN2.0.<br />
* Electrical isolation of the CAN bus line with a 5 kV insulation rating.<br />
* Multiple protection circuits: short-circuit, ESD, and lightning surge protection; 500 W lightning surge protection per channel.<br />
* Terminal resistor 120 Ω switchable via jumper caps.<br />
* Two operating modes: both channels share one SPI line or use two independent SPI lines.<br />
* Power: external DC 8–28 V at the DC connector; alternatively powered from the Raspberry Pi.<br />
* Logic level selectable 3.3 V or 5 V via jumper; when used with Raspberry Pi (a 3.3 V system), set the jumper to 3.3 V.<br />
* Dimensions 65.0 × 56.5 mm; through-hole diameter 3.0 mm.<br />
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'''Commands and examples – verify before use:''' <br />
<syntaxhighlight lang="text"><br />
sudo raspi-config<br />
sudo reboot<br />
dtparam=spi=on<br />
dtoverlay=spi1-3cs<br />
dtoverlay=mcp251xfd,spi0-0,interrupt=25<br />
dtoverlay=mcp251xfd,spi1-0,interrupt=24<br />
dtoverlay=mcp251xfd,spi0-1,interrupt=24<br />
</syntaxhighlight><br />
<br />
== Notes and version constraints ==<br />
* The Rev2.1 version requires kernel 5.4.77 or later; older systems may not work.<br />
* When plugging/unplugging the pin header, gently pry with a tool to protect solder joints; pulling by hand can cause detachment.<br />
* On Bullseye, 'apt' is recommended over 'apt-get'; only Python3 is supported.<br />
* Before starting, verify that SPI is not already in use by other devices (/boot/config.txt).<br />
* CAN_H/CAN_L must be connected correctly (H to H, L to L); reversed wiring or shorts (e.g., accidental connection to the HDMI port) will prevent communication.<br />
* The number of connectable CAN devices depends on data volume and load; with high real-time requirements, possibly only 2–3 devices simultaneously – test in the specific application.<br />
* Current draw at the external connector is 20–50 mA depending on voltage; exact values should be verified for the operating scenario.<br />
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== Source and revision record ==<br />
* [https://www.waveshare.com/wiki/2-CH_CAN_FD_HAT 2-CH CAN FD HAT - Waveshare Wiki]<br />
* Source revision: 88337<br />
* Captured: 2026-08-31T03:59:18+00:00<br />
* SHA-256: <code>068e7fcc1cd9f6e0a95c84715f9209fe04c67fde0f8e9f646c84b4b4e9c16396</code></div>JWTechPublisher