贴出初始化代码，参照例程写的，大佬看看，可有问题？
void Can_Init(void) //can0
{
/* configure CAN0 GPIO */
gpio_init(GPIOA,GPIO_MODE_IPU,GPIO_OSPEED_50MHZ,GPIO_PIN_11); //can_rx
gpio_init(GPIOA,GPIO_MODE_AF_PP,GPIO_OSPEED_50MHZ,GPIO_PIN_12); //can_tx
//(can_parameter_struct can_parameter, can_filter_parameter_struct can_filter)
can_parameter_struct can_parameter;
can_filter_parameter_struct can_filter;
can_struct_para_init(CAN_INIT_STRUCT, &can_parameter);
can_struct_para_init(CAN_FILTER_STRUCT, &can_filter);
/* initialize CAN register */
can_deinit(CAN0); // rst CAN0
/* initialize CAN parameters */
can_parameter.time_triggered = DISABLE; // 禁用时间触发通信
can_parameter.auto_bus_off_recovery = DISABLE; //软件离线恢复
can_parameter.auto_wake_up = DISABLE; // 软件唤醒
can_parameter.no_auto_retrans = ENABLE; // 禁止自动重发
can_parameter.rec_fifo_overwrite = DISABLE; // 使能接收满覆盖
can_parameter.trans_fifo_order = ENABLE; //·按顺序发送
can_parameter.working_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_3TQ;
can_parameter.prescaler = 60; //CAN_BAUDRATE == 100
/*-- CAN_BAUDRATE == 1000K can_parameter.prescaler = 6; ---*/
/*-- CAN_BAUDRATE == 500K can_parameter.prescaler = 12; --*/
/*-- CAN_BAUDRATE == 250 can_parameter.prescaler = 24; --*/
/*-- CAN_BAUDRATE == 125 can_parameter.prescaler = 48;---*/
/*---CAN_BAUDRATE == 100 can_parameter.prescaler = 60; --*/
/*---CAN_BAUDRATE == 50 can_parameter.prescaler = 120;--*/
/* initialize CAN */
can_init(CAN0, &can_parameter);
/* initialize filter */
can_filter.filter_number=0; //指定过滤器0
can_filter.filter_mode =CAN_FILTERMODE_LIST; // CAN_FILTERMODE_LIST; 列表
can_filter.filter_bits = CAN_FILTERBITS_32BIT;
can_filter.filter_list_high = 0x3000; //31-21:SFID(10:0) zkid=0x180 =384
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_FIFO0;
can_filter.filter_enable = ENABLE;
can_filter_init(&can_filter);
/* enable CAN0 receive FIFO0 not empty interrupt */
can_interrupt_enable(CAN0, CAN_INT_RFNE0);
/* configure CAN0 NVIC */
nvic_irq_enable(USBD_LP_CAN0_RX0_IRQn,1,1);
}
//中断后读取数据
void USBD_LP_CAN0_RX0_IRQHandler(void)
{
CAN_Rx_Flag=1;
/* check the receive message */
can_message_receive(CAN0, CAN_FIFO0, &receive_message);
}
|
楼主
