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TMS320F28377S: CAN通讯故障如何处理

Part Number: TMS320F28377S

问题:断掉CAN通讯线M_CANRXA或者M_CANTXA或者隔离芯片Vcom_5V供电,CAN通讯断掉,再重新连接上述断掉的线,CAN通讯无法恢复。请问这时触发的是CAN通讯的何种故障,应该如何处理,有没有编程参考手册?谢谢

电路如下: