S32 Design StudioのトピックRe: Error frame for S32K144 CAN

Error frame for S32K144 CAN

ShiYunSong — Tue, 29 Sep 2020 03:18:05 GMT

基于S32K144，使用S32DS的PE工具配置CAN之后，如何检测CAN的错误帧，如何接收CAN的错误帧，如何发送CAN的错误帧以及如何防止CAN发送错误帧？S32K14X系列的CAN错误帧处理应注意什么？

PetrS — Tue, 29 Sep 2020 11:23:59 GMT

Hi,

error handling and fault confinement is done automatically and follows CAN Protocol standard;https://www.nxp.com/docs/en/reference-manual/BCANPSV2.pdf

Once error is detected, respective flag in ESR1 register is set and error counters are updated as per protocol standard.

BR, Petr

ShiYunSong — Wed, 30 Sep 2020 01:12:41 GMT

What should I do if I have a request not to send an error frame?

PetrS — Wed, 30 Sep 2020 12:29:19 GMT

Hi,

- you can put FlexCAN to Freeze mode, this way it does not participate on bus

- you can put transceiver to Standby mode by driving STB pin high. But if FlexCAN is transmitting anything it will ends in Bus off state.

BR, Petr