SWRU271I October   2010  – January 2020 CC2540 , CC2540T , CC2541 , CC2541-Q1 , CC2640R2F

 

  1.   Preface
    1.     Trademarks
    2.     Related Documentation
  2. 1Overview
    1. 1.1 Support Note
    2. 1.2 Introduction
    3. 1.3 Bluetooth Low Energy Protocol Stack Basics
  3. 2The TI Bluetooth Low Energy Software Development Platform
    1. 2.1 Overview
    2. 2.2 Configurations
    3. 2.3 Projects
    4. 2.4 Software Overview
  4. 3The Operating System Abstraction Layer (OSAL)
    1. 3.1 Overview
    2. 3.2 Task Initialization
    3. 3.3 Task Events and Event Processing
    4. 3.4 Heap Manager
    5. 3.5 OSAL Messages
  5. 4The Application and Profiles
    1. 4.1 Overview
    2. 4.2 Project Overview
    3. 4.3 Start-up in main()
    4. 4.4 Application Initialization
    5. 4.5 Event Processing
      1. 4.5.1 Periodic Event
      2. 4.5.2 OSAL Messages
    6. 4.6 Callbacks
    7. 4.7 Complete Attribute Table
    8. 4.8 Additional Sample Projects
  6. 5The Bluetooth Low Energy Protocol Stack
    1. 5.1 Overview
    2. 5.2 Generic Access Profile (GAP)
      1. 5.2.1 Overview
        1. 5.2.1.1 Connection Parameters
        2. 5.2.1.2 Effective Connection Interval
        3. 5.2.1.3 Connection Parameter Considerations
        4. 5.2.1.4 Connection Parameter Update
        5. 5.2.1.5 Connection Termination
      2. 5.2.2 GAP Abstraction
      3. 5.2.3 Configuring the GAP Layer
    3. 5.3 GAPRole Task
      1. 5.3.1 Peripheral Role
      2. 5.3.2 Central Role
    4. 5.4 Gap Bond Manager (GAPBondMgr)
      1. 5.4.1 Overview of Bluetooth Low Energy Security
      2. 5.4.2 Using the GapBondMgr Profile
      3. 5.4.3 GAPBondMgr Examples for Various Security Modes
        1. 5.4.3.1 Pairing Disabled
        2. 5.4.3.2 Just Works Pairing Without Bonding
        3. 5.4.3.3 Just Works Pairing With Bonding Enabled
        4. 5.4.3.4 Authenticated Pairing
        5. 5.4.3.5 Authenticated Pairing With Bonding Enabled
    5. 5.5 Generic Attribute Profile (GATT)
      1. 5.5.1 GATT Characteristics and Attributes
      2. 5.5.2 GATT Services and Profile
      3. 5.5.3 GATT Client Abstraction
        1. 5.5.3.1 Using the GATT Layer Directly
      4. 5.5.4 GATT Server Abstraction
        1. 5.5.4.1 GATTServApp Module
          1. 5.5.4.1.1 Building Up the Attribute Table
        2. 5.5.4.2 Profile Architecture
          1. 5.5.4.2.1 Attribute Table Definition
            1. 5.5.4.2.1.1 Service Declaration
            2. 5.5.4.2.1.2 Characteristic Declaration
            3. 5.5.4.2.1.3 Characteristic Value
            4. 5.5.4.2.1.4 Client Characteristic Configuration
          2. 5.5.4.2.2 Add Service Function
          3. 5.5.4.2.3 Register Application Callback Function
          4. 5.5.4.2.4 Read and Write Callback Functions
            1. 5.5.4.2.4.1 Read Request from A GATT Client
            2. 5.5.4.2.4.2 Write Request From Client
          5. 5.5.4.2.5 Get and Set Functions
    6. 5.6 L2CAP
    7. 5.7 HCI
      1. 5.7.1 HCI Extension Vendor-Specific Commands
      2. 5.7.2 Receiving HCI Extension Events in the Application
    8. 5.8 Library Files
  7. 6Drivers
    1. 6.1  Overview
    2. 6.2  ADC
    3. 6.3  AES
    4. 6.4  LCD
    5. 6.5  LED
    6. 6.6  KEY
    7. 6.7  DMA
    8. 6.8  UART and SPI
    9. 6.9  Other Peripherals
    10. 6.10 Simple NV (SNV)
  8. 7Creating a Custom Bluetooth Low Energy Application
    1. 7.1 Overview
    2. 7.2 Configuring the Bluetooth Low Energy Stack
    3. 7.3 Define Bluetooth Low Energy Behavior
    4. 7.4 Define Application Tasks
    5. 7.5 Configure Hardware Peripherals
    6. 7.6 Configuring Parameters for Custom Hardware
      1. 7.6.1 Board File
      2. 7.6.2 Adjusting for 32-MHz Crystal Stabilization Time
      3. 7.6.3 Setting the Sleep Clock Accuracy
    7. 7.7 Software Considerations
      1. 7.7.1 Memory Management for GATT Notifications and Indications
      2. 7.7.2 Limit Application Processing During Bluetooth Low Energy Activity
      3. 7.7.3 Global Interrupts
  9. 8Development and Debugging
    1. 8.1 Overview
    2. 8.2 IAR Overview
    3. 8.3 Using IAR Embedded Workbench
      1. 8.3.1 Open an Existing Project
      2. 8.3.2 Project Options, Configurations, and Defined Symbols
      3. 8.3.3 Building and Debugging a Project
      4. 8.3.4 Linker Map File
  10. 9General Information
    1. 9.1 Overview
    2. 9.2 Porting From BLE-Stack 1.5.0 to 1.5.1
    3. 9.3 Porting From BLE-Stack 1.4.2 to 1.5.0
    4. 9.4 Porting From Earlier BLE-Stack Versions
      1. 9.4.1 Porting BLEv1.4.1 Projects to BLEv1.4.2
      2. 9.4.2 Porting BLEv1.4.0 Projects to BLEv1.4.1
        1. 9.4.2.1 Project Porting Directions
        2. 9.4.2.2 API Changes
        3. 9.4.2.3 Typedef Changes
        4. 9.4.2.4 Structure Changes
          1. 9.4.2.4.1 Array Elements Changed to Pointers
          2. 9.4.2.4.2 Additional Fields in Key Distribution Strucutre
        5. 9.4.2.5 Default Value of HAL Components
        6. 9.4.2.6 Allocating Memory for Over-the-Air Messages
        7. 9.4.2.7 Allocation of Client Characteristic Configuration Table
      3. 9.4.3 Porting BLEv1.3.2 Projects to BLEv1.4.0
      4. 9.4.4 Porting BLEv1.2 Projects to BLEv1.3
      5. 9.4.5 Porting From CC2540 to CC2541 Project
    5. 9.5 Release Notes History
    6. 9.6 Document History
  11.   A GAP API
    1.     A.1 Commands
    2.     A.2 Configurable Parameters
    3.     A.3 Events
  12.   B GAPRole Peripheral Role API
    1.     B.1 Commands
    2.     B.2 Configurable Parameters
    3.     B.3 Callbacks
      1.      B.3.1 State Change Callback (pfnStateChange)
      2.      B.3.2 RSSI Callback (pfnRssiRead)
  13.   C GAPRole Central Role API
    1.     C.1 Commands
    2.     C.2 Configurable Parameters
    3.     C.3 Callbacks
      1.      C.3.1 RSSI Callback (rssiCB)
      2.      C.3.2 Central Event Callback (eventCB)
  14.   D GATT/ATT API
    1.     D.1 Overview
    2.     D.2 Server Commands
    3.     D.3 Client Commands
    4.     D.4 Return Values
    5.     D.5 Events
    6.     D.6 GATT Commands and Corresponding ATT Events
    7.     D.7 ATT_ERROR_RSP Error Codes
  15.   E GATTServApp API
    1.     E.1 Overview
    2.     E.2 Commands
  16.   F GAPBondMgr API
    1.     F.1 Overview
    2.     F.2 Commands
    3.     F.3 Configurable Parameters
    4.     F.4 Callbacks
      1.      F.4.1 Passcode Callback (passcodeCB)
      2.      F.4.2 Pairing State Callback (pairStateCB)
  17.   G HCI Extension API
    1.     G.1 Overview
    2.     G.2 Commands
    3.     G.3 Host Error Codes
  18.   Revision History

D.3 Client Commands

bStatus_t GATT_InitClient(void)

Initialize the GATT client in the Bluetooth Low Energy Stack.
Notes

GATT clients should call this from the application initialization function.

bStatus_t GATT_RegisterForInd (uint8 taskId)

Register to receive incoming ATT Indications or Notifications of attribute values.
Parameters

taskId: task which to forward indications or notifications

Notes

GATT clients should call this from the application initialization function.

bStatus_t GATT_DiscAllPrimaryServices( uint16 connHandle, uint8 taskId)

Used by a client to discover all primary services on a server.
Parameters

connHandle: connection to use

taskId: task to be notified of response

Corresponding Events

If the return status is SUCCESS, the calling application task receives multiple GATT_MSG_EVENT messages with type ATT_READ_BY_GRP_TYPE_RSP or ATT_ERROR_RSP (if an error occurred on the server). This sub-procedure is complete when either ATT_READ_BY_GRP_TYPE_RSP (with bleProcedureComplete or bleTimeout status) or the calling application task receives the ATT_ERROR_RSP (with SUCCESS status).

bStatus_t GATT_DiscPrimaryServiceByUUID( uint16 connHandle, uint8 *pValue, uint8 len, uint8 taskId )

Used by a client to discover a specific primary service on a server when only the Service UUID is known.
Parameters

connHandle: connection to use

pValue: pointer to value (UUID) to look for

len: length of value

taskId: task to be notified of response

Corresponding Events

If the return status is SUCCESS, the calling application task receives multiple GATT_MSG_EVENT messages with type ATT_FIND_BY_TYPE_VALUE_RSP or ATT_ERROR_RSP (if an error occurred on the server). This sub-procedure is complete when either ATT_FIND_BY_TYPE_VALUE_RSP (with bleProcedureComplete or bleTimeout status) or the calling application task receives the ATT_ERROR_RSP (with SUCCESS status).

bStatus_t GATT_FindIncludedServices( uint16 connHandle, uint16 startHandle, uint16 endHandle, uint8 taskId )

Used by a client to find included services with a primary service definition on a server.
Parameters

connHandle: connection to use

startHandle: start handle of primary service to search

endHandle: end handle of primary service to search

taskId: task to be notified of response

Corresponding Events

If the return status is SUCCESS, the calling application task receives multiple GATT_MSG_EVENT messages with type ATT_READ_BY_TYPE_RSP or ATT_ERROR_RSP (if an error occurred on the server). This subprocedure is complete when either ATT_READ_BY_TYPE_RSP (with bleProcedureComplete or bleTimeout status) or ATT_ERROR_RSP (with SUCCESS status) is received by the calling application task. If the return status is SUCCESS, the calling application task receives multiple GATT_MSG_EVENT messages with type ATT_FIND_BY_TYPE_VALUE_RSP or ATT_ERROR_RSP (if an error occurred on the server). This sub-procedure is complete when either ATT_FIND_BY_TYPE_VALUE_RSP (with bleProcedureComplete or bleTimeout status) or the calling application task recieves the ATT_ERROR_RSP (with SUCCESS status).

bStatus_t GAPRole_GetParameter(uint16 param, void *pValue)

Get a GAP Role parameter.
Parameters

param – Profile parameter ID (See Section F.3)

pValue – pointer to a location to get the value. This pointer depends on the param ID and is cast to the appropriate data type.

Returns

SUCCESS

INVALIDPARAMETER: param was not valid

bStatus_t GATT_DiscAllChars( uint16 connHandle, uint16 startHandle, uint16 endHandle, uint8 taskId )

Used by a client to find all the characteristic declarations within a service when the handle range of the service is known.
Parameters

connHandle: connection to use

startHandle: start handle of service to search

endHandle: end handle of service to search

taskId: task to be notified of response

Corresponding Events

If the return status is SUCCESS, the calling application task receives multiple GATT_MSG_EVENT messages with type ATT_READ_BY_TYPE_RSP or ATT_ERROR_RSP (if an error occurred on the server). This sub-procedure is complete when either ATT_READ_BY_TYPE_RSP (with bleProcedureComplete or bleTimeout status) or the calling application task receives the ATT_ERROR_RSP (with SUCCESS status).

bStatus_t GATT_DiscCharsByUUID( uint16 connHandle, attReadByTypeReq_t *pReq, uint8 taskId )

Used by a client to discover service characteristics on a server when the service handle range and characteristic UUID is known.
Parameters

connHandle: connection to use

pReq: pointer to request to be sent, including start and end handles of service and UUID of characteristic value for which to search.

taskId: task to be notified of response

Corresponding Events

If the return status is SUCCESS, the calling application task receives multiple GATT_MSG_EVENT messages with type ATT_READ_BY_TYPE_RSP or ATT_ERROR_RSP (if an error occurred on the server). This sub-procedure is complete when either ATT_READ_BY_TYPE_RSP (with bleProcedureComplete or bleTimeout status) orthe calling application task recieves the ATT_ERROR_RSP (with SUCCESS status).

bStatus_t GATT_DiscAllCharDescs ( uint16 connHandle, uint16 startHandle, uint16 endHandle, uint8 taskId )

Used by a client to find all the characteristic descriptor’s Attribute Handles and AttributeTypes within a characteristic definition when only the characteristic handle range is known.
Parameters

connHandle: connection to use

startHandle: start handle

endHandle: end handle

taskId: task to be notified of response

Notes

If the return status is SUCCESS, the calling application task receives multiple GATT_MSG_EVENT messages with type ATT_FIND_INFO_RSP or ATT_ERROR_RSP (if an error occurred on the server). This sub-procedure is complete when either ATT_FIND_INFO_RSP (with bleProcedureComplete or bleTimeout status) or the calling application task receives the ATT_ERROR_RSP (with SUCCESS status).

bStatus_t GATT_ReadCharValue ( uint16 connHandle, attReadReq_t *pReq, uint8 taskId )

Used to read a Characteristic Value from a server when the client knows the Characteristic Value Handle.
Parameters

connHandle: connection to use

pReq: pointer to request to be sent

taskId: task to be notified of response

Notes

If the return status is SUCCESS, the calling application task receives an OSAL GATT_MSG_EVENT message with type ATT_READ_RSP or ATT_ERROR_RSP (if an error occurred on the server). This sub- procedure is complete when either ATT_READ_RSP (with SUCCESS or bleTimeout status) or the calling application receives the ATT_ERROR_RSP (with SUCCESS status).

bStatus_t GATT_ReadUsingCharUUID ( uint16 connHandle, attReadByTypeReq_t *pReq, uint8 taskId )

Used to read a Characteristic Value from a server when the client only knows the characteristic UUID and does not know the handle of the characteristic.
Parameters

connHandle: connection to use

pReq: pointer to request to be sent

taskId: task to be notified of response

Notes

If the return status is SUCCESS, the calling application task receives an OSAL GATT_MSG_EVENT message with type ATT_READ_BY_TYPE_RSP or ATT_ERROR_RSP (if an error occurred on the server). This sub-procedure is complete when either ATT_READ_BY_TYPE_RSP (with SUCCESS or bleTimeout status) or the calling application task receives the ATT_ERROR_RSP (with SUCCESS status).

bStatus_t GATT_ReadLongCharValue ( uint16 connHandle, attReadBlobReq_t *pReq, uint8 taskId )

Used to read a Characteristic Value from a server when the client knows the Characteristic Value Handle and the length of the Characteristic Value is longer than can be sent in a single Read Response Attribute Protocol message.
Parameters

connHandle: connection to use

pReq: pointer to request to be sent

taskId: task to be notified of response

Notes

If the return status is SUCCESS, the calling application task receives multiple GATT_MSG_EVENT messages with type ATT_READ_BLOB_RSP or ATT_ERROR_RSP (if an error occurred on the server). This sub-procedure is complete when either ATT_READ_BLOB_RSP (with bleProcedureComplete or bleTimeout status) or the calling application task receives the ATT_ERROR_RSP (with SUCCESS status).

bStatus_t GATT_ReadMultiCharValues ( uint16 connHandle, attReadMultiReq_t *pReq, uint8 taskId )

Used to read multiple Characteristic Values from a server when the client knows the Characteristic Value Handles.
Parameters

connHandle: connection to use

pReq: pointer to request to be sent

taskId: task to be notified of response

Notes

If the return status from this function is SUCCESS, the calling application task receives an OSAL GATT_MSG_EVENT message with type ATT_READ_MULTI_RSP or ATT_ERROR_RSP (if an error occurred on the server). This sub-procedure is complete when either ATT_READ_MULTI_RSP (with SUCCESS or bleTimeout status) or the calling application task receives the ATT_ERROR_RSP (with SUCCESS status).

bStatus_t GATT_WriteNoRsp (uint16 connHandle, attWriteReq_t *pReq)

Used to request the server to write or cancel the write of all the prepared values currently held in the prepare queue from this client.
Parameters

connHandle: connection to use

pReq: pointer to command to be sent

Notes

No response will be sent to the calling application task for this sub-procedure. If the Characteristic Value write request is the wrong size or has an invalid value as defined by the profile, the write fails and the server generates no error.

bStatus_t GATT_SignedWriteNoRsp (uint16 connHandle, attWriteReq_t *pReq)

Used to write a Characteristic Value to a server when the client knows the Characteristic Value Handle and the ATT Bearer is not encrypted. This sub-procedure shall only be used if the Characteristic Properties authenticated bit is enabled and the client and server device share a bond as defined in the GAP.
Parameters

connHandle: connection to use

pReq: pointer to command to be sent

Notes

No response is sent to the calling application task for this sub-procedure. If the authenticated Characteristic Value is the wrong size or has an invalid value as defined by the profile or the signed value fails to authenticate the client, the write fails and no error is generated by the server.

bStatus_t GATT_WriteCharValue ( uint16 connHandle, attWriteReq_t *pReq, uint8 taskId )

Used to write a characteristic value to a server when the client knows the characteristic value handle.
Parameters

connHandle: connection to use

pReq: pointer to request to be sent

taskId: task to be notified of response

Notes

If the return status from this function is SUCCESS, the calling application task receives an OSAL GATT_MSG_EVENT message with type ATT_WRITE_RSP or ATT_ERROR_RSP (if an error occurred on the server). This sub-procedure is complete when either ATT_WRITE_RSP (with SUCCESS or bleTimeout status) or the calling application task receives the ATT_ERROR_RSP (with SUCCESS status).

bStatus_t GATT_ReliableWrites ( uint16 connHandle, attPrepareWriteReq_t *pReq, uint8 numReqs, uint8 flags, uint8 taskId )

Used to write a Characteristic Value to a server when the client knows the Characteristic Value Handle, and assurance is required that the correct Characteristic Value is going to be written by transferring the Characteristic Value to be written in both directions before the write is performed.
Parameters

connHandle: connection to use

pReq: pointer to requests to be sent (must be allocated)

numReqs - number of requests in pReq

flags - execute write request flags

taskId: task to be notified of response

Notes

If the return status is SUCCESS, the calling application task receives multiple GATT_MSG_EVENT messages with type ATT_PREPARE_WRITE_RSP, ATT_EXECUTE_WRITE_RSP or ATT_ERROR_RSP (if an error occurred on the server). This sub-procedure is complete when either ATT_PREPARE_WRITE_RSP (with bleTimeout status), ATT_EXECUTE_WRITE_RSP (with SUCCESS or bleTimeout status), or the calling application task receives the ATT_ERROR_RSP (with SUCCESS status) .

bStatus_t GATT_ReadCharDesc ( uint16 connHandle, attReadReq_t *pReq, uint8 taskId )

Used to read a characteristic descriptor from a server when the client knows the attribute handle of the characteristic descriptor declaration’.
Parameters

connHandle: connection to use

pReq: pointer to request to be sent

taskId: task to be notified of response

Notes

If the return status from this function is SUCCESS, the calling application task receives an OSAL GATT_MSG_EVENT message with type ATT_READ_RSP or ATT_ERROR_RSP (if an error occurred on the server). This sub-procedure is complete when either ATT_READ_RSP (with SUCCESS or bleTimeout status) or the calling application task receives the ATT_ERROR_RSP (with SUCCESS status).

bStatus_t GATT_ReadLongCharDesc ( uint16 connHandle, attReadBlobReq_t *pReq, uint8 taskId )

Used to read a characteristic descriptor from a server when the client knows the characteristic descriptor declaration’s Attribute handle and the length of the characteristic descriptor declaration is longer than can send in a single Read Response attribute protocol message
Parameters

connHandle: connection to use

pReq: pointer to request to be sent

taskId: task to be notified of response

Notes

If the return status from this function is SUCCESS, the calling application task receives an OSAL GATT_MSG_EVENT message with type ATT_READ_RSP or ATT_ERROR_RSP (if an error occurred on the server). This sub-procedure is complete when either ATT_READ_RSP (with SUCCESS or bleTimeout status) or the calling application task receives the ATT_ERROR_RSP (with SUCCESS status).

bStatus_t GATT_WriteCharDesc ( uint16 connHandle, attWriteReq_t *pReq, uint8 taskId )

Used to write a characteristic descriptor value to a server when the client knows the characteristic descriptor handle.
Parameters

connHandle: connection to use

pReq: pointer to request to be sent

taskId: task to be notified of response

bStatus_t GATT_WriteLongCharDesc ( uint16 connHandle, gattPrepareWriteReq_t *pReq, uint8 taskId )

Used to write a Characteristic Value to a server when the client knows the Characteristic Value Handle but the length of the Characteristic Value is longer than can be sent in a single Write Request Attribute Protocol message.
Parameters

connHandle: connection to use

pReq: pointer to request to be sent

taskId: task to be notified of response

Notes

If the return status is SUCCESS, the calling application task receives multiple GATT_MSG_EVENT messages with type ATT_PREPARE_WRITE_RSP, ATT_EXECUTE_WRITE_RSP or ATT_ERROR_RSP (if an error occurred on the server). This sub-procedure is complete when either ATT_PREPARE_WRITE_RSP (with bleTimeout status), ATT_EXECUTE_WRITE_RSP (with SUCCESS or bleTimeout status), or the calling application task recieves the ATT_ERROR_RSP (with SUCCESS status).

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