NRF52840在配对连接后过个几十秒就连接断开是什么原因？
通过在断开连接的处理函数的位置打断点，查看p_ble_evt变量下的ble_gap_evt_disconnected_t里边的reason原因：
typedef struct
{
uint8_t reason; /**< HCI error code, see @ref BLE_HCI_STATUS_CODES. */
} ble_gap_evt_disconnected_t;reason的值为0x22。
在ble_hci.h中有错误原因的代码定义，如下：
#define BLE_HCI_STATUS_CODE_SUCCESS 0x00 /**< Success. */ #define BLE_HCI_STATUS_CODE_UNKNOWN_BTLE_COMMAND 0x01 /**< Unknown BLE Command. */ #define BLE_HCI_STATUS_CODE_UNKNOWN_CONNECTION_IDENTIFIER 0x02 /**< Unknown Connection Identifier. */ /*0x03 Hardware Failure 0x04 Page Timeout */ #define BLE_HCI_AUTHENTICATION_FAILURE 0x05 /**< Authentication Failure. */ #define BLE_HCI_STATUS_CODE_PIN_OR_KEY_MISSING 0x06 /**< Pin or Key missing. */ #define BLE_HCI_MEMORY_CAPACITY_EXCEEDED 0x07 /**< Memory Capacity Exceeded. */ #define BLE_HCI_CONNECTION_TIMEOUT 0x08 /**< Connection Timeout. */ /*0x09 Connection Limit Exceeded 0x0A Synchronous Connection Limit To A Device Exceeded 0x0B ACL Connection Already Exists*/ #define BLE_HCI_STATUS_CODE_COMMAND_DISALLOWED 0x0C /**< Command Disallowed. */ /*0x0D Connection Rejected due to Limited Resources 0x0E Connection Rejected Due To Security Reasons 0x0F Connection Rejected due to Unacceptable BD_ADDR 0x10 Connection Accept Timeout Exceeded 0x11 Unsupported Feature or Parameter Value*/ #define BLE_HCI_STATUS_CODE_INVALID_BTLE_COMMAND_PARAMETERS 0x12 /**< Invalid BLE Command Parameters. */ #define BLE_HCI_REMOTE_USER_TERMINATED_CONNECTION 0x13 /**< Remote User Terminated Connection. */ #define BLE_HCI_REMOTE_DEV_TERMINATION_DUE_TO_LOW_RESOURCES 0x14 /**< Remote Device Terminated Connection due to low resources.*/ #define BLE_HCI_REMOTE_DEV_TERMINATION_DUE_TO_POWER_OFF 0x15 /**< Remote Device Terminated Connection due to power off. */ #define BLE_HCI_LOCAL_HOST_TERMINATED_CONNECTION 0x16 /**< Local Host Terminated Connection. */ /* 0x17 Repeated Attempts 0x18 Pairing Not Allowed 0x19 Unknown LMP PDU */ #define BLE_HCI_UNSUPPORTED_REMOTE_FEATURE 0x1A /**< Unsupported Remote Feature. */ /* 0x1B SCO Offset Rejected 0x1C SCO Interval Rejected 0x1D SCO Air Mode Rejected*/ #define BLE_HCI_STATUS_CODE_INVALID_LMP_PARAMETERS 0x1E /**< Invalid LMP Parameters. */ #define BLE_HCI_STATUS_CODE_UNSPECIFIED_ERROR 0x1F /**< Unspecified Error. */ /*0x20 Unsupported LMP Parameter Value 0x21 Role Change Not Allowed */ #define BLE_HCI_STATUS_CODE_LMP_RESPONSE_TIMEOUT 0x22 /**< LMP Response Timeout. */ #define BLE_HCI_STATUS_CODE_LMP_ERROR_TRANSACTION_COLLISION 0x23 /**< LMP Error Transaction Collision/LL Procedure Collision. */ #define BLE_HCI_STATUS_CODE_LMP_PDU_NOT_ALLOWED 0x24 /**< LMP PDU Not Allowed. */ /*0x25 Encryption Mode Not Acceptable 0x26 Link Key Can Not be Changed 0x27 Requested QoS Not Supported */ #define BLE_HCI_INSTANT_PASSED 0x28 /**< Instant Passed. */ #define BLE_HCI_PAIRING_WITH_UNIT_KEY_UNSUPPORTED 0x29 /**< Pairing with Unit Key Unsupported. */ #define BLE_HCI_DIFFERENT_TRANSACTION_COLLISION 0x2A /**< Different Transaction Collision. */ /* 0x2B Reserved 0x2C QoS Unacceptable Parameter 0x2D QoS Rejected 0x2E Channel Classification Not Supported 0x2F Insufficient Security */ #define BLE_HCI_PARAMETER_OUT_OF_MANDATORY_RANGE 0x30 /**< Parameter Out Of Mandatory Range. */
从上面可以看到0x22为BLE_HCI_STATUS_CODE_LMP_RESPONSE_TIMEOUT，那这个是什么意思和原因呢？
标签：
#NRF52840#
