关于GD32F450 CAN1进入不了中断

用GD32F450调试CAN时，发现第二个CAN进入不了中断。通过请教专业人士，需要将第二个CAN的配置成

    /* initialize filter */
    /* CAN1 filter number */
    can_filter1.filter_number = 15;


    /* initialize filter */    
    can_filter1.filter_mode = CAN_FILTERMODE_MASK;
    can_filter1.filter_bits = CAN_FILTERBITS_32BIT;
    can_filter1.filter_list_high = 0x0000;
    can_filter1.filter_list_low = 0x0000;
    can_filter1.filter_mask_high = 0x0000;
    can_filter1.filter_mask_low = 0x0000;  
    can_filter1.filter_fifo_number = CAN_FIFO0;
    can_filter1.filter_enable = ENABLE;
    can_filter_init(&can_filter1);
        


    /* enable CAN receive FIFO1 not empty interrupt */
    can_interrupt_enable(CAN1, CAN_INTEN_RFNEIE0);

 

下面是GD32F450两路CAN的完整的初始化代码，配置完成两路CAN即可进入接收中断

void can_networking_init(void)
{
    can_parameter_struct can_parameter;
    can_filter_parameter_struct can_filter;
    can_filter_parameter_struct can_filter1;
    
     /* enable can clock */
    rcu_periph_clock_enable(RCU_CAN0);
    rcu_periph_clock_enable(RCU_CAN1);
    rcu_periph_clock_enable(RCU_GPIOA);
    rcu_periph_clock_enable(RCU_GPIOB);
    
    /* configure CAN0 GPIO, CAN0_TX(PA12) and CAN0_RX(PA11) */
    gpio_output_options_set(GPIOA, GPIO_OTYPE_PP, GPIO_OSPEED_50MHZ, GPIO_PIN_11);
    gpio_mode_set(GPIOA, GPIO_MODE_AF, GPIO_PUPD_NONE, GPIO_PIN_11);
    gpio_af_set(GPIOA, GPIO_AF_9, GPIO_PIN_11);
    
    gpio_output_options_set(GPIOA, GPIO_OTYPE_PP, GPIO_OSPEED_50MHZ, GPIO_PIN_12);
    gpio_mode_set(GPIOA, GPIO_MODE_AF, GPIO_PUPD_NONE, GPIO_PIN_12);
    gpio_af_set(GPIOA, GPIO_AF_9, GPIO_PIN_12);
    
    /* configure CAN1 GPIO, CAN0_TX(PB13) and CAN0_RX(PB12) */
    gpio_output_options_set(GPIOB, GPIO_OTYPE_PP, GPIO_OSPEED_50MHZ, GPIO_PIN_12);
    gpio_mode_set(GPIOB, GPIO_MODE_AF, GPIO_PUPD_NONE, GPIO_PIN_12);
    gpio_af_set(GPIOB, GPIO_AF_9, GPIO_PIN_12);
    
    gpio_output_options_set(GPIOB, GPIO_OTYPE_PP, GPIO_OSPEED_50MHZ, GPIO_PIN_13);
    gpio_mode_set(GPIOB, GPIO_MODE_AF, GPIO_PUPD_NONE, GPIO_PIN_13);
    gpio_af_set(GPIOB, GPIO_AF_9, GPIO_PIN_13);
    


    /* initialize CAN register */
    can_deinit(CAN0);
    can_deinit(CAN1);
    
    /* initialize CAN */
    can_parameter.time_triggered = DISABLE;
    can_parameter.auto_bus_off_recovery = DISABLE;
    can_parameter.auto_wake_up = DISABLE;
    can_parameter.auto_retrans = DISABLE;
    can_parameter.rec_fifo_overwrite = DISABLE;
    can_parameter.trans_fifo_order = DISABLE;
    can_parameter.working_mode =CAN_NORMAL_MODE;// CAN_LOOPBACK_MODE;//CAN_NORMAL_MODE;
    can_parameter.resync_jump_width = CAN_BT_SJW_1TQ;
    can_parameter.time_segment_1 = CAN_BT_BS1_5TQ;
    can_parameter.time_segment_2 = CAN_BT_BS2_4TQ;
    /* baudrate 1Mbps */
    can_parameter.prescaler = 5;
    can_init(CAN0, &can_parameter);
    can_init(CAN1, &can_parameter);


    /* initialize filter */
    /* CAN0 filter number */
    can_filter.filter_number = 0;


    /* initialize filter */    
    can_filter.filter_mode = CAN_FILTERMODE_MASK;
    can_filter.filter_bits = CAN_FILTERBITS_32BIT;
    can_filter.filter_list_high = 0x0000;
    can_filter.filter_list_low = 0x0000;
    can_filter.filter_mask_high = 0x0000;
    can_filter.filter_mask_low = 0x0000;  
    can_filter.filter_fifo_number = CAN_FIFO0;
    can_filter.filter_enable = ENABLE;
    can_filter_init(&can_filter);
        
        
    /* enable CAN receive FIFO0 not empty interrupt */
    can_interrupt_enable(CAN0, CAN_INTEN_RFNEIE0);
        
    /* initialize filter */
    /* CAN1 filter number */
    can_filter1.filter_number = 15;


    /* initialize filter */    
    can_filter1.filter_mode = CAN_FILTERMODE_MASK;
    can_filter1.filter_bits = CAN_FILTERBITS_32BIT;
    can_filter1.filter_list_high = 0x0000;
    can_filter1.filter_list_low = 0x0000;
    can_filter1.filter_mask_high = 0x0000;
    can_filter1.filter_mask_low = 0x0000;  
    can_filter1.filter_fifo_number = CAN_FIFO0;
    can_filter1.filter_enable = ENABLE;
    can_filter_init(&can_filter1);
        


    /* enable CAN receive FIFO1 not empty interrupt */
    can_interrupt_enable(CAN1, CAN_INTEN_RFNEIE0);
        
    /* configure CAN0 NVIC */
    nvic_irq_enable(CAN0_RX0_IRQn,0,0);
    nvic_irq_enable(CAN1_RX0_IRQn,0,0);
        
}

添加相应的中断函数即可

void CAN0_RX0_IRQHandler(void)

void CAN1_RX0_IRQHandler(void)