S32K中的主题 CAN BUS

CAN BUS

wutengyouxi555 — Sat, 24 Feb 2024 10:05:20 GMT

This function is canerr callback function from s32k144 SDK 4.0.2

How CAN I know what kind of err has happened on the CAN bus from this Function.

Re: CAN BUS

PetrS — Mon, 26 Feb 2024 13:34:27 GMT

Hi,

calling FLEXCAN_DRV_GetErrorStatus (reading ESR1) you clears status error bits. So read it into some status variable and mask/check as needed. You can refer to https://community.nxp.com/t5/S32K-Knowledge-Base/Example-S32K144-FlexCAN-TX-RX-Error-ISR-test-S32DS2-2/ta-p/1278224

BR, Petr

Re: CAN BUS

wutengyouxi555 — Wed, 28 Feb 2024 09:23:02 GMT

Thinks your help. One more question，if a CRC err occurs , could i know which message is this error coming from ?

Re: CAN BUS

PetrS — Thu, 29 Feb 2024 06:03:43 GMT

Hi,

no, you have no such info about faulty message. Module does not store received CRC and moreover if error is detected a message is not moved-in into given MB. Just error free messages are stored, but without CRC info.

BR, Petr