S32K144 can0发送数据异常，请帮忙指导下谢谢

[xinhuan]

在调试CAN0时，我将 PTB0 和PTB1配置为can0进行通信时，发送数据不正确

波形如图所示：

[PetrS]

Hi,

this is not data CAN frames, but sequence of error fames which lead to bus off condition. You can check ECR/ESR1 registers in debugger to know more.
Most probably connected CAN transceiver is not active or properly terminated. 
Without transceiver connected you can try to simply connect TX/RX together and see message transmitted still, due to missing ACK.

BR, Petr

[xinhuan · Accepted solution]

我找到了问题的解决方案，这个端口需要12v供电才能正常，

谢谢