mpc5748g Bus Off register

[skseofh]

Hi, I got really helpful answer for my last question.

https://community.nxp.com/t5/MPC5xxx/MPC5748G-CAN-Bus-Off/m-p/1261695#M17968

I have a one more question.

CAN_ESR1.BOFFDONEINT is set after counting 128 occurrences of 11 consecutive recessive bits on the CAN bus.

And if CAN_ERS2.BOFFDONEMSK is set, an interrupt is generated to the CPU.

How is this related with CAN_CTRL1.BOFFREC bit?

I asserted CAN_CTRL1.BOFFREC(disable auto recovery) and asserted CAN_ERS2.BOFFDONEMSK, but didn't get out of the Bus-off state.

Is CAN_CTRL1.BOFFREC bit only related to get out of the Bus-Off state?

[PetrS · Accepted solution]

Hi,

yes, in manual recover mode you have to clear BOFFREC so you can get out of bus off state. After leaving bus off you can set BOFFREC again.

BR, Petr