CAN 配置

Board options --->
    [*] Using CAN0
    [*] Using CAN1

Luban-Lite CAN 的 driver 层是基于 RT-Thread 的 CAN 驱动框架实现的，所以需要使能 RT-Thread 的 CAN 驱动框架：

RT-Thread options --->
    RT-Thread Components --->
        Device Drivers --->
            [*] Using CAN device drivers
            [*] Enable CAN hardware filter
            [ ] Enable CANFD support

单过滤模式配置示例：

/* config can rx filter */
struct rt_can_filter_item items[1] =
{
    //Only receive standard data frame with ID 0x100~0x1FF
    RT_CAN_FILTER_ITEM_INIT(0x100, 0, 0, 0, 0x700, RT_NULL, RT_NULL),
};

struct rt_can_filter_config cfg = {1, 1, items};

ret = rt_device_control(can_rx_dev, RT_CAN_CMD_SET_FILTER, &cfg);

双过滤模式配置示例：

/* config can rx filter */
struct rt_can_filter_item items[2] =
{
    //Only receive standard data frame with ID 0x100~0x1FF
    RT_CAN_FILTER_ITEM_INIT(0x100, 0, 0, 0, 0x700, RT_NULL, RT_NULL),
    //Only receive standard data frame with ID 0x345
    RT_CAN_FILTER_ITEM_INIT(0x345, 0, 0, 0, 0x7FF, RT_NULL, RT_NULL),
};

struct rt_can_filter_config cfg = {2, 1, items};

ret = rt_device_control(can_rx_dev, RT_CAN_CMD_SET_FILTER, &cfg);