## b_mod_state

此功能模块提供给用户进行应用的开发：

状态：进入状态时执行的函数、在此状态下执行的函数、离开状态时执行的函数

事件：每个状态可附加一个事件表：事件&事件处理函数

###  数据结构

```C
typedef void (*pStateEvenHandler_t)(uint32_t event, void *arg);
typedef void (*pStateEnterHandler_t)(uint32_t pre_state);
typedef void (*pStateExitHandler_t)(void);
typedef void (*pStateHandler_t)(void);

typedef struct
{
    uint32_t            event;
    pStateEvenHandler_t handler;
} bStateEvent_t;

typedef struct
{
    bStateEvent_t *p_event_table;
    uint32_t       number;
} bStateEventTable_t;

typedef struct
{
    uint32_t             state;
    pStateEnterHandler_t enter;
    pStateExitHandler_t  exit;
    pStateHandler_t      handler;
    bStateEventTable_t   event_table;
} bStateInfo_t;
```

###  接口介绍

```C
#define bSTATE_REG_INSTANCE(state_info)   //注册状态信息                                                   
int bStateTransfer(uint32_t state);                //切换状态
int bStateInvokeEvent(uint32_t event, void *arg);  //触发事件
int bGetCurrentState(void);                        //获取当前状态
```

###