STM32的CAN硬件本身就是完全符合CAN总线规范的呀，硬件上就支持自动重发！配置问题！看看CAN_MCR寄存器的NART位描述：
Bit 4 NART : No automatic retransmission
0: The CAN hardware will automatically retransmit the message until it has been
successfully transmitted according to the CAN standard.
1: A message will be transmitted only once, independently of the transmission result
(successful, error or arbitration lost).
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怎么感觉你像老师在指导我们，看到原子哥的视频是有提到自动加的，也可以自己在外面加来判断吧
确实，那问题来了，如何让整个现场遵循CAN总线规范呢？求指点
发送邮箱就三个，需要发送的帧数会不止三帧，我这里为了统一单帧和多帧发送接口，整个发送都是使用延时发送。所以在接收时很容易出问题。
STM32的CAN硬件本身就是完全符合CAN总线规范的呀，硬件上就支持自动重发！配置问题！看看CAN_MCR寄存器的NART位描述：
Bit 4 NART : No automatic retransmission
0: The CAN hardware will automatically retransmit the message until it has been
successfully transmitted according to the CAN standard.
1: A message will be transmitted only once, independently of the transmission result
(successful, error or arbitration lost).
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