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280049c接收到can数据后只有数据段,没有仲裁域

使用280049c开发can部分驱动,使用开发板的canA。

发送寄存器中,CAN_IF1DATA和CAN_IF1DATB和需要发送的数据一致,CAN_IF1ARB和要发送的仲裁域一致。

但是,从对端发送到开发板的can上后,观察can的接收寄存器,CAN_IF2DATA和CAN_IF2DATB寄存器和对端发送的数据一致,但是CAN_IF2ARB为0,读取不到仲裁域。