DevHandle I2cOpen(int16_t number);
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static struct I2cCntlr *I2cManagerFindCntlr(int16_t number)
{
    struct I2cCntlr *cntlr = NULL;
    struct I2cManager *manager = g_i2cManager;
    //检查I2C控制器序号是否合法
    //检查I2C控制器
    //检查I2C锁控制器
    cntlr = manager->cntlrs[number];
    return cntlr;
}
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root {
    platform {
        i2c_config {
            match_attr = "st_stm32mp157_i2c"; /*需要和device_info.hcs中的deviceMatchAttr值一致
            使device_info.hsc可以正确调用私人配置数据*/

            template i2c_controller {
                bus = 1;    
                reg_pbase = 0x40012000; //物理基地址
                reg_size = 0x400;   //寄存器位宽
                timing = 0x10909CEC;
                own_address1 = 0;
                addressing_mode = 0x00000001;
                dual_address_mode = 0x00000000;
                own_address2 = 0;
                own_address_2_masks = 0x00;
                general_call_mode = 0x00000000;
                no_stretch_mode = 0x00000000;
            }

            controller_0x40012000 :: i2c_controller {
                bus = 1;    //i2c控制器序号，用于打开i2c
                reg_pbase = 0x40012000;
                /***********************/
                /* [port,pin]
                    <port> 0:GPIOA 1:GPIOB 3:GPIOC ......GPIOF便是5
                    <pin>  0:PIN0 1:PIN1 2:PIN2 ......
                */                    
                i2cClkIomux = [5, 14];   //PF14,SCL
                i2cDataIomux = [5, 15];  //PF15,SDA
                /***********************/
            }
            controller_0x40013000 :: i2c_controller {
                bus = 2;
                reg_pbase = 0x40013000;

                i2cClkIomux = [7, 4];   //PH4
                i2cDataIomux = [7, 5];  //PH5
            }
             controller_0x40015000 :: i2c_controller {
                bus = 5;
                reg_pbase = 0x40015000;

                i2cClkIomux = [0, 11];   //PA11
                i2cDataIomux = [0, 12];  //PA12
            }
        }
    }
}
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struct I2cCntlr {
    struct OsalMutex lock;
    void *owner;
    int16_t busId;  
    void *priv;//存储设备属性
    const struct I2cMethod *ops;//I2cMethod的实例化对象的挂载
    const struct I2cLockMethod *lockOps;//I2cLockMethod的实例化对象的挂载
};
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struct I2cMethod {
int32_t (*transfer)(struct I2cCntlr *cntlr, struct I2cMsg *msgs, int16_t count);
};
struct I2cLockMethod {//锁机制操作结构体
    int32_t (*lock)(struct I2cCntlr *cntlr);//加锁
    void (*unlock)(struct I2cCntlr *cntlr); //解锁
};
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