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<a href="https://gitlab.rtems.org/ppisa">Pavel Pisa</a>
<a href="https://gitlab.rtems.org/rtems/rtos/rtems/-/issues/5440#note_140517">commented</a>:
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<p dir="auto" style="color: #3a383f; margin: 0 0 1rem;" align="initial">I support this project importance.</p>
<p dir="auto" style="color: #3a383f; margin: 0 0 1rem;" align="initial"><a href="https://gitlab.rtems.org/michallenc" data-reference-type="user" data-user="15" data-container="body" data-placement="top" class="gfm gfm-project_member js-user-link" title="Michal Lenc" style="color: #284779; background-color: #cbe2f9; border-radius: .25rem; margin-top: 0; padding: 0 2px;">@michallenc</a> has already working SJA1000 driver with basic functionality. He is finalizing FIFO order preemption for higher priority frame incoming into higher priority FIFO/edge.</p>
<p dir="auto" style="color: #3a383f; margin: 0 0 1rem;" align="initial">Code is on the <code style='font-size: 90%; color: #18171d; word-wrap: break-word; border-radius: .25rem; background-color: #ececef; margin-top: 0; font-weight: inherit; white-space: break-spaces; overflow-wrap: break-word; font-family: "GitLab Mono", "JetBrains Mono", "Menlo", "DejaVu Sans Mono", "Liberation Mono", "Consolas", "Ubuntu Mono", "Courier New", "andale mono", "lucida console", monospace; font-variant-ligatures: none; word-break: keep-all; padding: 0.125rem 0.25rem;'>sja1000</code> branch of our RTEMS CAN development repo</p>
<p dir="auto" style="color: #3a383f; margin: 0 0 1rem;" align="initial"><a href="https://gitlab.fel.cvut.cz/otrees/rtems/rtems-canfd/-/tree/sja1000/lib/candrv/sja1000" rel="nofollow noreferrer noopener" target="_blank" style="margin-top: 0;">https://gitlab.fel.cvut.cz/otrees/rtems/rtems-canfd/-/tree/sja1000/lib/candrv/sja1000</a></p>
<p dir="auto" style="color: #3a383f; margin: 0 0 1rem;" align="initial">The advantage of this chip and implementation is that it is really limited, only single Tx frame on fly and only standard CAN etc. Another advantage is QEMU support.</p>
<p dir="auto" style="color: #3a383f; margin: 0 0 1rem;" align="initial">It can be used as simple template for more simpler chips.</p>
<p dir="auto" style="color: #3a383f; margin: 0 0 1rem;" align="initial">When it will be finished, it will be send into RTEMS mainline.</p>
<p dir="auto" style="color: #3a383f; margin: 0 0 1rem;" align="initial">I have implemented partially XNP LPC17xx/LPC40xx driver which I plan to finish one day.</p>
<p dir="auto" style="color: #3a383f; margin: 0 0 1rem;" align="initial">For the higher level layers, OrtCAN CAN/CANopen framework includes basic support for RTEMS CAN stack, standard CAN only, CAN FD needs to be added</p>
<p dir="auto" style="color: #3a383f; margin: 0 0 1rem;" align="initial"><a href="https://ortcan.sourceforge.net/" rel="nofollow noreferrer noopener" target="_blank" style="margin-top: 0;">https://ortcan.sourceforge.net/</a></p>
<p dir="auto" style="color: #3a383f; margin: 0 0 1rem;" align="initial">Adding D-CAN and M-CAN support would be nice target for futire development.</p>
<p dir="auto" style="color: #3a383f; margin: 0 0 1rem;" align="initial">By the way, I am at <a href="https://fosdem.org/2026/" rel="nofollow noreferrer noopener" target="_blank" style="margin-top: 0;">https://fosdem.org/2026/</a> this weekend so if somebody has interest to discuss these projects with me in person.</p>
<p dir="auto" style="color: #3a383f; margin: 0;" align="initial">I will be in RISC-V devroom on Saturday.</p>
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