Macro device_table 

macro_rules! device_table {
    ($board_name:ident, { $($device_name:ident: $driver_type:ty = $value:expr),* $(,)? }) => { ... };
}

设备表宏定义 用于生成设备的单例结构体和板级设备初始化/反初始化方法 语法: device_table!(BoardName, { Device1: DriverType1 = value1, Device2: DriverType2 = value2, … });