https://community.nxp.com/t5/S32K/S32DS3-5-optimize-cause-CAN-bus-off-issue/m-p/2127704#M50515 <P>Hi@<SPAN>Ali22</SPAN></P> <P><SPAN>From the register configuration you provided, the BUS-OFF state occurred and the ERRINT bit was set, but you did not enable the corresponding interrupt flags: CTRL1.BOFFMSK and CRTL1.ERRMSK</SPAN></P> <P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="Senlent_0-1751508762528.png" style="width: 740px;"><img src="https://community.nxp.com/t5/image/serverpage/image-id/345872i80FFAC55692D49DA/image-dimensions/740x446?v=v2" width="740" height="446" role="button" title="Senlent_0-1751508762528.png" alt="Senlent_0-1751508762528.png" /><span class="lia-inline-image-caption" onclick="event.preventDefault();">Senlent_0-1751508762528.png</span></span></P> <P>&nbsp;</P> Thu, 03 Jul 2025 03:15:02 GMT Senlent 2025-07-03T03:15:02Z https://community.nxp.com/t5/S32K/S32DS3-5-optimize-cause-CAN-bus-off-issue/m-p/2127624#M50512 <P>Dears</P><P>Recently, I meet a strange issue that when I set the S32DS3.5 optimization level to -O2</P><P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="1.jpg.png"><img src="https://community.nxp.com/t5/image/serverpage/image-id/345791i81E7F9AD25825F96/image-size/large?v=v2&amp;px=999" alt="1.jpg.png" title="1.jpg.png" /></span></P><P>After set the&nbsp;optimization level to -O2, the CAN goes to bus-off status, but there is no bus-off event happen, so I wonder why setting the S32DS3.5&nbsp;optimization level can cause CAN module enter bus-off, anyone who meet this issue or who can explain the relationship between&nbsp;optimization level and CAN bus-off? Thanks.</P><P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="1.jpg.png"><img src="https://community.nxp.com/t5/image/serverpage/image-id/345792iF691B48030E39C6B/image-size/large?v=v2&amp;px=999" alt="1.jpg.png" title="1.jpg.png" /></span></P> Thu, 03 Jul 2025 00:48:02 GMT https://community.nxp.com/t5/S32K/S32DS3-5-optimize-cause-CAN-bus-off-issue/m-p/2127624#M50512 Ali22 2025-07-03T00:48:02Z https://community.nxp.com/t5/S32K/S32DS3-5-optimize-cause-CAN-bus-off-issue/m-p/2127704#M50515 <P>Hi@<SPAN>Ali22</SPAN></P> <P><SPAN>From the register configuration you provided, the BUS-OFF state occurred and the ERRINT bit was set, but you did not enable the corresponding interrupt flags: CTRL1.BOFFMSK and CRTL1.ERRMSK</SPAN></P> <P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="Senlent_0-1751508762528.png" style="width: 740px;"><img src="https://community.nxp.com/t5/image/serverpage/image-id/345872i80FFAC55692D49DA/image-dimensions/740x446?v=v2" width="740" height="446" role="button" title="Senlent_0-1751508762528.png" alt="Senlent_0-1751508762528.png" /><span class="lia-inline-image-caption" onclick="event.preventDefault();">Senlent_0-1751508762528.png</span></span></P> <P>&nbsp;</P> Thu, 03 Jul 2025 03:15:02 GMT https://community.nxp.com/t5/S32K/S32DS3-5-optimize-cause-CAN-bus-off-issue/m-p/2127704#M50515 Senlent 2025-07-03T03:15:02Z