關鍵字：bluetooth 藍芽協議  HCI剖析 HCI概述 HCI筆記 LMP L2CAP SDP RFCOMM 

作者：zhongjun

文章有不當處請指正，共同學習

LMP剖析 + 模擬原始碼：

HCI剖析 + 模擬原始碼：

rfcomm剖析 + 模擬原始碼（未完成）

------------------------------------------------------------------------------------------------------------------------------------

華麗分割線，進入正題

------------------------------------------------------------------------------------------------------------------------------------

HCI原始碼：

bt_hci.h

/** This file is part of the HCI protocal.* Data  :20160506* Author: zhongjun**/#ifndef BT_HCI_H_H#define BT_HCI_H_H#include "bt_cfg.h"#ifdef DEBUG_BT_HCI
 
#define DEBUG(x) {printf x;}#define BT_HCI_DEBUG(x) DEBUG(x)#else#define BT_HCI_DEBUG(x) #endif#define TRANSPORT_UART#define TRANSPORT_USBx#define TRANSPORT_SDIOx#define SCAN_DISABLED  0x00#define SCAN_INQUIRY  0x01#define SCAN_PAGE  0x02/* ACL flags */#define ACL_CONT  0x01#define ACL_START  0x02#define ACL_ACTIVE_BCAST 0x04
 
#define ACL_PICO_BCAST  0x08/* CMD/EVT/ACL/SCO types */#define HCI_COMMAND_PKT  0x01#define HCI_ACLDATA_PKT  0x02#define HCI_SCODATA_PKT  0x03#define HCI_EVENT_PKT  0x04#define HCI_VENDOR_PKT  0xff/* HCI Packet types */#define HCI_2DH1 0x0002#define HCI_3DH1 0x0004#define HCI_DM1  0x0008#define HCI_DH1  0x0010#define HCI_2DH3 0x0100#define HCI_3DH3 0x0200#define HCI_DM3  0x0400#define HCI_DH3  0x0800#define HCI_2DH5 0x1000#define HCI_3DH5 0x2000#define HCI_DM5  0x4000#define HCI_DH5  0x8000#define HCI_HV1  0x0020#define HCI_HV2  0x0040#define HCI_HV3  0x0080#define HCI_EV3  0x0008#define HCI_EV4  0x0010#define HCI_EV5  0x0020#define HCI_2EV3 0x0040#define HCI_3EV3 0x0080#define HCI_2EV5 0x0100#define HCI_3EV5 0x0200/* HCI Error codes */#define HCI_UNKNOWN_COMMAND   0x01#define HCI_NO_CONNECTION   0x02#define HCI_HARDWARE_FAILURE   0x03#define HCI_PAGE_TIMEOUT   0x04#define HCI_AUTHENTICATION_FAILURE  0x05#define HCI_PIN_OR_KEY_MISSING   0x06#define HCI_MEMORY_FULL    0x07#define HCI_CONNECTION_TIMEOUT   0x08#define HCI_MAX_NUMBER_OF_CONNECTIONS  0x09#define HCI_MAX_NUMBER_OF_SCO_CONNECTIONS 0x0a#define HCI_ACL_CONNECTION_EXISTS  0x0b#define HCI_COMMAND_DISALLOWED   0x0c#define HCI_REJECTED_LIMITED_RESOURCES  0x0d#define HCI_REJECTED_SECURITY   0x0e#define HCI_REJECTED_PERSONAL   0x0f#define HCI_HOST_TIMEOUT   0x10#define HCI_UNSUPPORTED_FEATURE   0x11#define HCI_INVALID_PARAMETERS   0x12#define HCI_OE_USER_ENDED_CONNECTION  0x13#define HCI_OE_LOW_RESOURCES   0x14#define HCI_OE_POWER_OFF   0x15#define HCI_CONNECTION_TERMINATED  0x16#define HCI_REPEATED_ATTEMPTS   0x17#define HCI_PAIRING_NOT_ALLOWED   0x18#define HCI_UNKNOWN_LMP_PDU   0x19#define HCI_UNSUPPORTED_REMOTE_FEATURE  0x1a#define HCI_SCO_OFFSET_REJECTED   0x1b#define HCI_SCO_INTERVAL_REJECTED  0x1c#define HCI_AIR_MODE_REJECTED   0x1d#define HCI_INVALID_LMP_PARAMETERS  0x1e#define HCI_UNSPECIFIED_ERROR   0x1f#define HCI_UNSUPPORTED_LMP_PARAMETER_VALUE 0x20#define HCI_ROLE_CHANGE_NOT_ALLOWED  0x21#define HCI_LMP_RESPONSE_TIMEOUT  0x22#define HCI_LMP_ERROR_TRANSACTION_COLLISION 0x23#define HCI_LMP_PDU_NOT_ALLOWED   0x24#define HCI_ENCRYPTION_MODE_NOT_ACCEPTED 0x25#define HCI_UNIT_LINK_KEY_USED   0x26#define HCI_QOS_NOT_SUPPORTED   0x27#define HCI_INSTANT_PASSED   0x28#define HCI_PAIRING_NOT_SUPPORTED  0x29#define HCI_TRANSACTION_COLLISION  0x2a#define HCI_QOS_UNACCEPTABLE_PARAMETER  0x2c#define HCI_QOS_REJECTED   0x2d#define HCI_CLASSIFICATION_NOT_SUPPORTED 0x2e#define HCI_INSUFFICIENT_SECURITY  0x2f#define HCI_PARAMETER_OUT_OF_RANGE  0x30#define HCI_ROLE_SWITCH_PENDING   0x32#define HCI_SLOT_VIOLATION   0x34#define HCI_ROLE_SWITCH_FAILED   0x35#define HCI_EIR_TOO_LARGE   0x36#define HCI_SIMPLE_PAIRING_NOT_SUPPORTED 0x37#define HCI_HOST_BUSY_PAIRING   0x38/* Command opcode pack/unpack */#define cmd_opcode_pack(ogf, ocf) (uint16_t)((ocf & 0x03ff)|(ogf << 10))#define cmd_opcode_ogf(op)  (op >> 10)#define cmd_opcode_ocf(op)  (op & 0x03ff)/* ACL handle and flags pack/unpack */#define acl_handle_pack(h, f) (uint16_t)((h & 0x0fff)|(f << 12))#define acl_get_handle(h)  (h & 0x0fff)#define acl_get_flags(h)  (h >> 12)/* -----  HCI Commands ----- *//* Link Control */#define OGF_LINK_CTL  0x01#define OCF_INQUIRY   0x0001#define OCF_INQUIRY_CANCEL  0x0002#define OCF_PERIODIC_INQUIRY  0x0003#define OCF_EXIT_PERIODIC_INQUIRY 0x0004#define OCF_CREATE_CONN   0x0005#define OCF_DISCONNECT   0x0006#define OCF_ADD_SCO   0x0007#define OCF_CREATE_CONN_CANCEL  0x0008#define OCF_ACCEPT_CONN_REQ  0x0009#define OCF_REJECT_CONN_REQ  0x000A#define OCF_LINK_KEY_REPLY  0x000B#define OCF_LINK_KEY_NEG_REPLY  0x000C#define OCF_PIN_CODE_REPLY  0x000D#define OCF_PIN_CODE_NEG_REPLY  0x000E#define OCF_SET_CONN_PTYPE  0x000F#define OCF_AUTH_REQUESTED  0x0011#define OCF_SET_CONN_ENCRYPT  0x0013#define OCF_CHANGE_CONN_LINK_KEY 0x0015#define OCF_MASTER_LINK_KEY  0x0017#define OCF_REMOTE_NAME_REQ  0x0019#define OCF_REMOTE_NAME_REQ_CANCEL 0x001A#define OCF_READ_REMOTE_FEATURES 0x001B#define OCF_READ_REMOTE_EXT_FEATURES 0x001C#define OCF_READ_REMOTE_VERSION  0x001D#define OCF_READ_CLOCK_OFFSET  0x001F#define OCF_READ_LMP_HANDLE  0x0020#define OCF_SETUP_SYNC_CONN  0x0028#define OCF_ACCEPT_SYNC_CONN_REQ 0x0029#define OCF_REJECT_SYNC_CONN_REQ 0x002A#define OCF_IO_CAPABILITY_REPLY  0x002B#define OCF_USER_CONFIRM_REPLY  0x002C#define OCF_USER_CONFIRM_NEG_REPLY 0x002D#define OCF_USER_PASSKEY_REPLY  0x002E#define OCF_USER_PASSKEY_NEG_REPLY 0x002F#define OCF_REMOTE_OOB_DATA_REPLY 0x0030#define OCF_REMOTE_OOB_DATA_NEG_REPLY 0x0033#define OCF_IO_CAPABILITY_NEG_REPLY 0x0034/* Link Policy */#define OGF_LINK_POLICY  0x02#define OCF_HOLD_MODE   0x0001#define OCF_SNIFF_MODE   0x0003#define OCF_EXIT_SNIFF_MODE  0x0004#define OCF_PARK_MODE   0x0005#define OCF_EXIT_PARK_MODE  0x0006#define OCF_QOS_SETUP   0x0007#define OCF_ROLE_DISCOVERY  0x0009#define OCF_SWITCH_ROLE   0x000B#define OCF_READ_LINK_POLICY  0x000C#define OCF_WRITE_LINK_POLICY  0x000D#define OCF_READ_DEFAULT_LINK_POLICY 0x000E#define OCF_WRITE_DEFAULT_LINK_POLICY 0x000F#define OCF_FLOW_SPECIFICATION  0x0010#define OCF_SNIFF_SUBRATING  0x0011/* Host Controller and Baseband */#define OGF_HOST_CTL  0x03#define OCF_SET_EVENT_MASK  0x0001#define OCF_RESET   0x0003#define OCF_SET_EVENT_FLT  0x0005#define OCF_FLUSH   0x0008#define OCF_READ_PIN_TYPE  0x0009#define OCF_WRITE_PIN_TYPE  0x000A#define OCF_CREATE_NEW_UNIT_KEY  0x000B#define OCF_READ_STORED_LINK_KEY 0x000D#define OCF_WRITE_STORED_LINK_KEY 0x0011#define OCF_DELETE_STORED_LINK_KEY 0x0012#define OCF_CHANGE_LOCAL_NAME  0x0013#define OCF_READ_LOCAL_NAME  0x0014#define OCF_READ_CONN_ACCEPT_TIMEOUT 0x0015#define OCF_WRITE_CONN_ACCEPT_TIMEOUT 0x0016#define OCF_READ_PAGE_TIMEOUT  0x0017#define OCF_WRITE_PAGE_TIMEOUT  0x0018#define OCF_READ_SCAN_ENABLE  0x0019#define OCF_WRITE_SCAN_ENABLE  0x001A#define OCF_READ_PAGE_ACTIVITY  0x001B#define OCF_WRITE_PAGE_ACTIVITY  0x001C#define OCF_READ_INQ_ACTIVITY  0x001D#define OCF_WRITE_INQ_ACTIVITY  0x001E#define OCF_READ_AUTH_ENABLE  0x001F#define OCF_WRITE_AUTH_ENABLE  0x0020#define OCF_READ_ENCRYPT_MODE  0x0021#define OCF_WRITE_ENCRYPT_MODE  0x0022#define OCF_READ_CLASS_OF_DEV  0x0023#define OCF_WRITE_CLASS_OF_DEV  0x0024#define OCF_READ_VOICE_SETTING  0x0025#define OCF_WRITE_VOICE_SETTING  0x0026#define OCF_READ_AUTOMATIC_FLUSH_TIMEOUT 0x0027#define OCF_WRITE_AUTOMATIC_FLUSH_TIMEOUT 0x0028#define OCF_READ_NUM_BROADCAST_RETRANS 0x0029#define OCF_WRITE_NUM_BROADCAST_RETRANS 0x002A#define OCF_READ_HOLD_MODE_ACTIVITY 0x002B#define OCF_WRITE_HOLD_MODE_ACTIVITY 0x002C#define OCF_READ_TRANSMIT_POWER_LEVEL 0x002D#define OCF_READ_SYNC_FLOW_ENABLE 0x002E#define OCF_WRITE_SYNC_FLOW_ENABLE 0x002F#define OCF_SET_CONTROLLER_TO_HOST_FC 0x0031#define OCF_HOST_BUFFER_SIZE  0x0033#define OCF_HOST_NUM_COMP_PKTS  0x0035#define OCF_READ_LINK_SUPERVISION_TIMEOUT 0x0036#define OCF_WRITE_LINK_SUPERVISION_TIMEOUT 0x0037#define OCF_READ_NUM_SUPPORTED_IAC 0x0038#define OCF_READ_CURRENT_IAC_LAP 0x0039#define OCF_WRITE_CURRENT_IAC_LAP 0x003A#define OCF_READ_PAGE_SCAN_PERIOD_MODE 0x003B#define OCF_WRITE_PAGE_SCAN_PERIOD_MODE 0x003C#define OCF_READ_PAGE_SCAN_MODE  0x003D#define OCF_WRITE_PAGE_SCAN_MODE 0x003E#define OCF_SET_AFH_CLASSIFICATION 0x003F#define OCF_READ_INQUIRY_SCAN_TYPE 0x0042#define OCF_WRITE_INQUIRY_SCAN_TYPE 0x0043#define OCF_READ_INQUIRY_MODE  0x0044#define OCF_WRITE_INQUIRY_MODE  0x0045#define OCF_READ_PAGE_SCAN_TYPE  0x0046#define OCF_WRITE_PAGE_SCAN_TYPE 0x0047#define OCF_READ_AFH_MODE  0x0048#define OCF_WRITE_AFH_MODE  0x0049#define OCF_READ_EXT_INQUIRY_RESPONSE 0x0051#define OCF_WRITE_EXT_INQUIRY_RESPONSE 0x0052#define OCF_REFRESH_ENCRYPTION_KEY 0x0053#define OCF_READ_SIMPLE_PAIRING_MODE 0x0055#define OCF_WRITE_SIMPLE_PAIRING_MODE 0x0056#define OCF_READ_LOCAL_OOB_DATA  0x0057#define OCF_READ_INQUIRY_TRANSMIT_POWER_LEVEL 0x0058#define OCF_WRITE_INQUIRY_TRANSMIT_POWER_LEVEL 0x0059#define OCF_READ_DEFAULT_ERROR_DATA_REPORTING 0x005A#define OCF_WRITE_DEFAULT_ERROR_DATA_REPORTING 0x005B#define OCF_ENHANCED_FLUSH  0x005F#define OCF_SEND_KEYPRESS_NOTIFY 0x0060/* Informational Parameters */#define OGF_INFO_PARAM  0x04#define OCF_READ_LOCAL_VERSION  0x0001#define OCF_READ_LOCAL_COMMANDS  0x0002#define OCF_READ_LOCAL_FEATURES  0x0003#define OCF_READ_LOCAL_EXT_FEATURES 0x0004#define OCF_READ_BUFFER_SIZE  0x0005#define OCF_READ_COUNTRY_CODE  0x0007#define OCF_READ_BD_ADDR  0x0009/* Status params */#define OGF_STATUS_PARAM 0x05#define OCF_READ_FAILED_CONTACT_COUNTER  0x0001#define OCF_RESET_FAILED_CONTACT_COUNTER 0x0002#define OCF_READ_LINK_QUALITY  0x0003#define OCF_READ_RSSI   0x0005#define OCF_READ_AFH_MAP  0x0006#define OCF_READ_CLOCK   0x0007/* Testing commands */#define OGF_TESTING_CMD  0x06#define OCF_READ_LOOPBACK_MODE   0x0001#define OCF_WRITE_LOOPBACK_MODE   0x0002#define OCF_ENABLE_DEVICE_UNDER_TEST_MODE 0x0003#define OCF_WRITE_SIMPLE_PAIRING_DEBUG_MODE 0x0004/* Vendor specific commands */#define OGF_VENDOR_CMD  0x3f/* ---- HCI Events ---- */#define EVT_INQUIRY_COMPLETE  0x01#define EVT_INQUIRY_RESULT  0x02#define EVT_CONN_COMPLETE  0x03#define EVT_CONN_REQUEST  0x04#define EVT_DISCONN_COMPLETE  0x05#define EVT_AUTH_COMPLETE  0x06#define EVT_REMOTE_NAME_REQ_COMPLETE 0x07#define EVT_ENCRYPT_CHANGE  0x08#define EVT_CHANGE_CONN_LINK_KEY_COMPLETE 0x09#define EVT_MASTER_LINK_KEY_COMPLETE  0x0A#define EVT_READ_REMOTE_FEATURES_COMPLETE 0x0B#define EVT_READ_REMOTE_VERSION_COMPLETE 0x0C#define EVT_QOS_SETUP_COMPLETE  0x0D#define EVT_CMD_COMPLETE   0x0E#define EVT_CMD_STATUS    0x0F#define EVT_HARDWARE_ERROR  0x10#define EVT_FLUSH_OCCURRED  0x11#define EVT_ROLE_CHANGE   0x12#define EVT_NUM_COMP_PKTS  0x13#define EVT_MODE_CHANGE   0x14#define EVT_RETURN_LINK_KEYS  0x15#define EVT_PIN_CODE_REQ  0x16#define EVT_LINK_KEY_REQ  0x17#define EVT_LINK_KEY_NOTIFY  0x18#define EVT_LOOPBACK_COMMAND  0x19#define EVT_DATA_BUFFER_OVERFLOW 0x1A#define EVT_MAX_SLOTS_CHANGE  0x1B#define EVT_READ_CLOCK_OFFSET_COMPLETE 0x1C#define EVT_CONN_PTYPE_CHANGED  0x1D#define EVT_QOS_VIOLATION  0x1E#define EVT_PSCAN_REP_MODE_CHANGE 0x20#define EVT_FLOW_SPEC_COMPLETE  0x21#define EVT_INQUIRY_RESULT_WITH_RSSI 0x22#define EVT_READ_REMOTE_EXT_FEATURES_COMPLETE 0x23#define EVT_SYNC_CONN_COMPLETE  0x2C#define EVT_SYNC_CONN_CHANGED  0x2D#define EVT_SNIFF_SUBRATING  0x2E#define EVT_EXTENDED_INQUIRY_RESULT 0x2F#define EVT_ENCRYPTION_KEY_REFRESH_COMPLETE 0x30#define EVT_IO_CAPABILITY_REQUEST 0x31#define EVT_IO_CAPABILITY_RESPONSE 0x32#define EVT_USER_CONFIRM_REQUEST 0x33#define EVT_USER_PASSKEY_REQUEST 0x34#define EVT_REMOTE_OOB_DATA_REQUEST 0x35#define EVT_SIMPLE_PAIRING_COMPLETE 0x36#define EVT_LINK_SUPERVISION_TIMEOUT_CHANGED 0x38#define EVT_ENHANCED_FLUSH_COMPLETE 0x39#define EVT_USER_PASSKEY_NOTIFY  0x3B#define EVT_KEYPRESS_NOTIFY  0x3C#define EVT_REMOTE_HOST_FEATURES_NOTIFY 0x3D#define HCI_COMMAND_HDR_SIZE 3#define HCI_EVENT_HDR_SIZE 3#define HCI_ACL_HDR_SIZE 4#define HCI_SCO_HDR_SIZE 3#pragma pack(1)/*PDU HDR*/typedef struct{  uint16_t opcode;  uint8_t para_total_len;}HCI_Command_HDR_Format;typedef struct{  uint8_t evecode;  uint8_t para_total_len;}HCI_Event_HDR_Format;typedef struct {  uint16_t handle;  /* Handle & Flags(PB, BC) */  uint16_t dlen;}HCI_ACL_HDR_Format;typedef struct { uint16_t handle; uint8_t dlen;}HCI_SCO_HDR_Format;/*DEATIL COMMAND PDU FORMAT*//* Link Control */typedef struct{  HCI_Command_HDR_Format HDR;  uint8_t lap[3];  uint8_t inquiry_time;  uint8_t num_limit;}COM_Inquiay_Format;typedef struct{  HCI_Command_HDR_Format HDR;  uint8_t BD_ADDR[6];  uint16_t pkt_type;  uint8_t pscan_rep_mode;  uint8_t reserved;  uint16_t clock_offset;  uint8_t role_switch;}COM_Create_Connect_Format;typedef struct{  HCI_Command_HDR_Format HDR;  uint16_t con_handle;  uint8_t reason;}COM_Disconnect_Format;/* Link Policy *//* Host Controller and Baseband */typedef struct{  HCI_Command_HDR_Format HDR;}COM_Reset_Format;typedef struct {  uint8_t status;}Reset_rsp_Format;typedef struct{  HCI_Command_HDR_Format HDR;  uint8_t scan_enable;}COM_Write_Scan_Enable_Format;typedef struct {  uint8_t status;}Write_Scan_Enable_rsp_Format;/* Informational Parameters */typedef struct{  HCI_Command_HDR_Format HDR;}COM_Read_Buffer_Size_Format;typedef struct{  uint8_t status;  uint16_t acl_mtu;  uint8_t sco_mtu;  uint16_t acl_max_pkt;  uint16_t sco_max_pkt;}Read_Buffer_Size_rsp_Format;typedef struct{  HCI_Command_HDR_Format HDR;}COM_Read_BD_ADDR_Format;typedef struct{  uint8_t status;  uint8_t BD_ADDR[6];}Read_BD_ADDR_rsp_Format;/* Status params *//* Testing commands *//* Vendor specific commands *//* Vendor specific commands *//*DEATIL EVENT PDU FORMAT*/typedef struct {  HCI_Event_HDR_Format HDR;  uint8_t ncmd;  uint16_t opcode;}EVT_Com_Complete_HDR_Format;typedef struct {  HCI_Event_HDR_Format HDR;  uint8_t status;  uint8_t ncmd;  uint16_t opcode;}EVT_CMD_Status_Format;typedef struct {  HCI_Event_HDR_Format HDR;  uint8_t ncmd;  uint8_t bdaddr[6];  uint8_t page_scan_mode;  uint8_t reserved[2];  uint8_t dev_class[3];  uint16_t clock_offset;}EVT_CMD_Inquiry_result_Format;typedef struct {  HCI_Event_HDR_Format HDR;  uint8_t status;  uint16_t con_handle;  uint8_t bdaddr[6];  uint8_t link_type;  uint8_t encryption_enabled;}EVT_CMD_Connect_complete_Format;typedef struct {  HCI_Event_HDR_Format HDR;  uint8_t status;  uint16_t con_handle;  uint8_t reason;}EVT_CMD_Disconnect_complete_Format;typedef struct {  HCI_Event_HDR_Format HDR;  uint8_t status;}EVT_CMD_Inquiry_complete_Format;#pragma pack ()/*HCI API*/int hci_reset();int hci_read_buffer_size();int hci_write_scan_enable(uint8_t scan_enable);int hci_read_bd_addr();int hci_connect_req(uint8_t BD_ADDR[6],uint16_t pkt_type,uint8_t pscan_rep_mode,uint8_t allow_role_switch);int hci_disconnect(uint16_t con_handle,uint8_t reason);int hci_inquiry(uint8_t lap[3],uint8_t inquiry_time,uint8_t num_limit);int hci_send_acl_data(uint16_t handle,uint8_t *acl_data,uint16_t acl_length);int hci_send_cmd(uint8_t *PDU,uint32_t length);int hci_receive_pdu(uint8_t *PDU,uint32_t length);int hci_parse_cmd(uint8_t *PDU,uint32_t length);int hci_parse_evt(uint8_t *PDU,uint32_t length);int hci_parse_acl(uint8_t *PDU,uint32_t length);int hci_parse_sco(uint8_t *PDU,uint32_t length);int hci_parse_evt_complete(uint8_t *PDU,uint32_t length);int hci_parse_evt_cmd_status(uint8_t *PDU,uint32_t length);int hci_parse_evt_inquiry_result(uint8_t *PDU,uint32_t length);int hci_parse_evt_inquiry_complete(uint8_t *PDU,uint32_t length);int hci_parse_evt_connect_complete(uint8_t *PDU,uint32_t length);int hci_parse_evt_disconnect_complete(uint8_t *PDU,uint32_t length);int hci_parse_reset_rsp(uint8_t *PDU,uint32_t length);int hci_parse_read_buffer_size_rsp(uint8_t *PDU,uint32_t length);int hci_parse_write_scan_enable_rsp(uint8_t *PDU,uint32_t length);int hci_parse_read_BD_ADDR_rsp(uint8_t *PDU,uint32_t length);#endif

#include "bt_hci.h"int hci_reset(){  COM_Reset_Format PDU;  PDU.HDR.opcode = cmd_opcode_pack(OGF_HOST_CTL,OCF_RESET);  PDU.HDR.para_total_len = sizeof(COM_Reset_Format) - HCI_COMMAND_HDR_SIZE;  hci_send_cmd((uint8_t *)&PDU,sizeof(COM_Reset_Format));}int hci_read_buffer_size(){  COM_Read_Buffer_Size_Format PDU;  PDU.HDR.opcode = cmd_opcode_pack(OGF_INFO_PARAM,OCF_READ_BUFFER_SIZE);  PDU.HDR.para_total_len = sizeof(COM_Read_Buffer_Size_Format) - HCI_COMMAND_HDR_SIZE;  hci_send_cmd((uint8_t *)&PDU,sizeof(COM_Read_Buffer_Size_Format));}int hci_write_scan_enable(uint8_t scan_enable){  COM_Write_Scan_Enable_Format PDU;  PDU.HDR.opcode = cmd_opcode_pack(OGF_HOST_CTL,OCF_WRITE_SCAN_ENABLE);  PDU.HDR.para_total_len = sizeof(COM_Write_Scan_Enable_Format) - HCI_COMMAND_HDR_SIZE;  PDU.scan_enable = scan_enable;  hci_send_cmd((uint8_t *)&PDU,sizeof(COM_Write_Scan_Enable_Format));}int hci_read_bd_addr(){  COM_Read_BD_ADDR_Format PDU;  PDU.HDR.opcode = cmd_opcode_pack(OGF_INFO_PARAM,OCF_READ_BD_ADDR);  PDU.HDR.para_total_len = sizeof(COM_Read_BD_ADDR_Format) - HCI_COMMAND_HDR_SIZE;  hci_send_cmd((uint8_t *)&PDU,sizeof(COM_Read_BD_ADDR_Format));}int hci_connect_req(uint8_t BD_ADDR[6],uint16_t pkt_type,uint8_t pscan_rep_mode,uint8_t allow_role_switch){  COM_Create_Connect_Format PDU;  PDU.HDR.opcode = cmd_opcode_pack(OGF_LINK_CTL,OCF_CREATE_CONN);  PDU.HDR.para_total_len = sizeof(COM_Create_Connect_Format) - HCI_COMMAND_HDR_SIZE;  memcpy(PDU.BD_ADDR,BD_ADDR,6);  PDU.pkt_type = pkt_type;  PDU.pscan_rep_mode = pscan_rep_mode;  PDU.reserved = 0;  PDU.clock_offset = 0;  PDU.role_switch = allow_role_switch;  hci_send_cmd((uint8_t *)&PDU,sizeof(COM_Create_Connect_Format)); }int hci_disconnect(uint16_t con_handle,uint8_t reason){  COM_Disconnect_Format PDU;  PDU.HDR.opcode = cmd_opcode_pack(OGF_LINK_CTL,OCF_DISCONNECT);  PDU.HDR.para_total_len = sizeof(COM_Disconnect_Format) - HCI_COMMAND_HDR_SIZE;  PDU.con_handle = con_handle;  PDU.reason = reason;  hci_send_cmd((uint8_t *)&PDU,sizeof(COM_Disconnect_Format)); }int hci_inquiry(uint8_t lap[3],uint8_t inquiry_time,uint8_t num_limit){  COM_Inquiay_Format PDU;  PDU.HDR.opcode = cmd_opcode_pack(OGF_LINK_CTL,OCF_INQUIRY);  PDU.HDR.para_total_len = sizeof(COM_Inquiay_Format) - HCI_COMMAND_HDR_SIZE;  memcpy(PDU.lap,lap,3);  PDU.inquiry_time = inquiry_time;  PDU.num_limit = num_limit;  hci_send_cmd((uint8_t *)&PDU,sizeof(COM_Inquiay_Format));}int hci_send_acl_data(uint16_t handle,uint8_t *acl_data,uint16_t acl_length){  }int hci_send_cmd(uint8_t *PDU,uint32_t length){  int index = 0;#if defined(TRANSPORT_UART)  uint8_t HCI_PDU[length+1];  HCI_PDU[0] = HCI_COMMAND_PKT;  memcpy(HCI_PDU+1,PDU,length);    BT_HCI_DEBUG((">> SEDN HCI COMMAND:"));  for(index = 0;index < length+1;index++)  {    BT_HCI_DEBUG(("0x%x ",HCI_PDU[index]));  }  BT_HCI_DEBUG(("\n"));    //NEED TO DO PASS THE DATA TO UART PORT#elif defined(TRANSPORT_USB)  //TODO#elif defined(TRANSPORT_SDIO)  //TODO#endif}int hci_receive_pdu(uint8_t *PDU,uint32_t length){#if defined(TRANSPORT_UART)  uint8_t pck_type = *PDU;  switch(pck_type)  {    case HCI_COMMAND_PKT:    {      BT_HCI_DEBUG(("<< COMMAND:"));      hci_parse_cmd(PDU+1,length-1);      break;    }    case HCI_ACLDATA_PKT:    {      BT_HCI_DEBUG(("<< ACL:"));      hci_parse_acl(PDU+1,length-1);      break;    }    case HCI_SCODATA_PKT:    {      BT_HCI_DEBUG(("<< SCO:"));      hci_parse_sco(PDU+1,length-1);      break;    }    case HCI_EVENT_PKT:    {      BT_HCI_DEBUG(("<< HCI_EVENT_PKT:"));      hci_parse_evt(PDU+1,length-1);      break;    }    default:    {      BT_HCI_DEBUG(("WARNING:UNKNOW PDU\n"));      break;    }  }#elif defined(TRANSPORT_USB)      //TODO#elif defined(TRANSPORT_SDIO)  //TODO#endif  }int hci_parse_cmd(uint8_t *PDU,uint32_t length){  HCI_Command_HDR_Format *COM_PDU = (HCI_Command_HDR_Format *)PDU;}int hci_parse_evt(uint8_t *PDU,uint32_t length){  HCI_Event_HDR_Format *EVT_PDU = (HCI_Event_HDR_Format *)PDU;  switch(EVT_PDU->evecode)  {    case EVT_CMD_COMPLETE:    {      BT_HCI_DEBUG(("EVT_CMD_COMPLETE "));      hci_parse_evt_complete(PDU,length);      break;    }    case EVT_CMD_STATUS:    {      BT_HCI_DEBUG(("EVT_CMD_STATUS \n"));      hci_parse_evt_cmd_status(PDU,length);      break;    }    case EVT_INQUIRY_RESULT:    {      BT_HCI_DEBUG(("EVT_INQUIRY_RESULT"));      hci_parse_evt_inquiry_result(PDU,length);      break;    }    case EVT_INQUIRY_COMPLETE:    {      BT_HCI_DEBUG(("EVT_INQUIRY_COMPLETE"));      hci_parse_evt_inquiry_complete(PDU,length);      break;    }    case EVT_CONN_COMPLETE:    {      BT_HCI_DEBUG(("EVT_CONN_COMPLETE"));      hci_parse_evt_connect_complete(PDU,length);      break;    }    case EVT_DISCONN_COMPLETE:    {      BT_HCI_DEBUG(("EVT_DISCONN_COMPLETE"));      hci_parse_evt_disconnect_complete(PDU,length);      break;    }    default:    {      int index = 0;      BT_HCI_DEBUG(("UNKNOW EVENT:"));      for(index = 0;index < length;index++)      { BT_HCI_DEBUG(("0x%02x ",PDU[index]));      }      BT_HCI_DEBUG(("\n"));      break;    }  }}int hci_parse_acl(uint8_t *PDU,uint32_t length){  HCI_ACL_HDR_Format *ACL_PDU = (HCI_ACL_HDR_Format *)PDU;}int hci_parse_sco(uint8_t *PDU,uint32_t length){  HCI_SCO_HDR_Format *SCO_PDU = (HCI_SCO_HDR_Format *)PDU;}int hci_parse_evt_complete(uint8_t *PDU,uint32_t length){  EVT_Com_Complete_HDR_Format *EVT_PDU = (EVT_Com_Complete_HDR_Format*)PDU;  switch(cmd_opcode_ogf(EVT_PDU->opcode))  {    case OGF_LINK_CTL:    {      BT_HCI_DEBUG(("OGF_LINK_CTL\n"));      break;    }    case OGF_LINK_POLICY:    {      BT_HCI_DEBUG(("OGF_LINK_POLICY\n"));      break;    }    case OGF_HOST_CTL:    {      BT_HCI_DEBUG(("OGF_HOST_CTL\n"));      switch(cmd_opcode_ocf(EVT_PDU->opcode))      { case OCF_RESET: {   hci_parse_reset_rsp((uint8_t *)EVT_PDU+sizeof(EVT_Com_Complete_HDR_Format),length-sizeof(EVT_Com_Complete_HDR_Format));   break; } case OCF_WRITE_SCAN_ENABLE: {   hci_parse_write_scan_enable_rsp((uint8_t *)EVT_PDU+sizeof(EVT_Com_Complete_HDR_Format),length-sizeof(EVT_Com_Complete_HDR_Format)); } default: {   break; }      }      break;    }    case OGF_INFO_PARAM:    {      BT_HCI_DEBUG(("OGF_INFO_PARAM\n"));      switch(cmd_opcode_ocf(EVT_PDU->opcode))      { case OCF_READ_BUFFER_SIZE: {   hci_parse_read_buffer_size_rsp((uint8_t *)EVT_PDU+sizeof(EVT_Com_Complete_HDR_Format),length-sizeof(EVT_Com_Complete_HDR_Format));   break; } case OCF_READ_BD_ADDR: {   hci_parse_read_BD_ADDR_rsp((uint8_t *)EVT_PDU+sizeof(EVT_Com_Complete_HDR_Format),length-sizeof(EVT_Com_Complete_HDR_Format)); } default: {   break; }      }      break;    }    case OGF_STATUS_PARAM:    {      BT_HCI_DEBUG(("OGF_STATUS_PARAM\n"));      break;    }    case OGF_TESTING_CMD:    {      BT_HCI_DEBUG(("OGF_TESTING_CMD\n"));      break;    }    case OGF_VENDOR_CMD:    {      BT_HCI_DEBUG(("OGF_VENDOR_CMD\n"));      break;    }    default:    {      break;    }  }   }int hci_parse_evt_cmd_status(uint8_t *PDU,uint32_t length){  EVT_CMD_Status_Format *EVT_PDU = (EVT_CMD_Status_Format*)PDU;  }int hci_parse_evt_inquiry_result(uint8_t *PDU,uint32_t length){  int index = 0;  EVT_CMD_Inquiry_result_Format *EVT_PDU = (EVT_CMD_Inquiry_result_Format*)PDU;  BT_HCI_DEBUG(("Inquiry rep num %d\n",EVT_PDU->ncmd));  BT_HCI_DEBUG(("Inquiry ADDR:"));  for