从机通过CAN卡与电脑连接起来，电脑给从机发送数据，硬件上可以检测到ARM的CAN-RX有脉冲，但是RxMassage里一直没有值，也没有进入接收中断，请大家看看我的程序有什么问题？[mw_shl_code=applescript,true]static void CAN_NVIC_Config(void)
{
           NVIC_InitTypeDef NVIC_InitStructure;
                /* Configure one bit for preemption priority */
                NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1);
                 /*ÖD¶ÏéèÖÃ*/
                NVIC_InitStructure.NVIC_IRQChannel = USB_LP_CAN1_RX0_IRQn;           //CAN1 RX0ÖD¶Ï
    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;                   //ÇàÕ¼óÅÏ輶0
    NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;                           //×óóÅÏ輶Îa0
    NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
    NVIC_Init(&NVIC_InitStructure);
}[/mw_shl_code]