Zigbee 之mac层之 mac_pib（一）

mac_pib 的结构如下：

 

typedef struct _MAC_PIB {

UINT32 macAckWaitDuration;//ack 确认包等待的时间

union _MAC_PIB_flags {

UINT32 val;

struct {

unsigned macAssociationPermit:1;//是否允许别关联

unsigned macAutoRequest:1;//是否自动发送请求

unsigned macBattLifeExt:1;

unsigned macGTSPermit:1;//是否允许GTS分配

unsigned macPromiscousMode:1;

unsigned macPanCoordinator:1;

unsigned ackPending:1;//1 表示正在等待ACK

unsigned TxInProgress:1;   //正在发送

unsigned GotBeaconResponse:1;      //1 表示已经收到beacon

unsigned WaitingForBeaconResponse:1; //1 表示正在等待Beacon 响应

unsigned macPending:1;       //mac CMD pending in the RX buffer

unsigned macIsAssociated:1; // 1 表示已经被关联

unsigned WaitingForAssocResponse:1; //1 表示正在等待关联响应

unsigned GotOrphanResponse:1; // 1 表示得到孤立响应

unsigned WaitingForOrphanResponse:1; //1 表示正在等待孤立响应

}bits;

}flags;

LADDR macCoordExtendedAddress; //父设备长地址

SADDR macCoordShortAddress;//父设备短地址

UINT16 macPANID; // 已加入的PAN ID

BYTE macDSN; // 序号

BYTE depth;            //depth in the network

BYTE macCapInfo;

        BYTE macMaxAckRetries;

struct  {

unsigned maxMaxCSMABackoffs:3;

unsigned macMinBE:2;

}misc;

UINT32 tx_start_time;    //time that packet was sent

        UINT32 last_data_rx_time;    //time that last data rx packet was received that was accepted by this node

        BYTE bcnDepth;

SADDR bcnSADDR;

UINT16 bcnPANID;

BYTE bcnRSSI;

BYTE currentAckRetries;

BYTE rxTail;             //tail pointer of rxBuff

        BYTE rxHead;             //head pointer of rxBuff

//fifo for RX pkts, holds LRWPAN_MAX_MAC_RX_PKTS

MACPKT  rxBuff[MAC_RXBUFF_SIZE];  //buffer for packets not yet processed

        #ifdef LRWPAN_FFD

//neighbor info

UINT16 nextChildRFD;      //下一个孩子精简设备的地址

UINT16 nextChildRouter;   //下一个孩子路由器的地址

BYTE   ChildRFDs;         //number of neighbor RFDs

BYTE   ChildRouters;      //number of neighbor Routers

BYTE   SuperframeOrder; //超帧阶数

            BYTE   BeaconOrder; //信标阶数

BYTE   FinalCAPSlot; // 最后一个竞争的SLOT的位置

         #endif

}MAC_PIB;