用蓝牙芯片CC2541/CC2540实现一个智能恒温箱

最近突然想自己做一个智能小冰箱玩一玩，于是决定动手试一试。

成品效果图

原材料

半导体制冷片一只

散热风扇

12V电源一台

智能恒温箱电路板

控制板的PCB图

原理图

供电部分原理图

制冷片控制部分原理图

蜂鸣器原理图

温度传感器原理图

GITHUB地址

完整代码以及电路图我放在了GITHUB上，欢迎下载哦。

https://github.com/dingbig/bluttooth_ice_box

控制部分源代码

 /**************************************************************************************************
   Filename:       simpleBLEPeripheral.c
   Revised:        $Date: 2010-08-06 08:56:11 -0700 (Fri, 06 Aug 2010) $
   Revision:       $Revision: 23333 $

   Description:    This file contains the Simple BLE Peripheral sample application
                   for use with the CC2540 Bluetooth Low Energy Protocol Stack.

   Copyright 2010 - 2014 Texas Instruments Incorporated. All rights reserved.

   IMPORTANT: Your use of this Software is limited to those specific rights
   granted under the terms of a software license agreement between the user
   who downloaded the software, his/her employer (which must be your employer)
   and Texas Instruments Incorporated (the "License").  You may not use this
   Software unless you agree to abide by the terms of the License. The License
   limits your use, and you acknowledge, that the Software may not be modified,
   copied or distributed unless embedded on a Texas Instruments microcontroller
   or used solely and exclusively in conjunction with a Texas Instruments radio
   frequency transceiver, which is integrated into your product.  Other than for
   the foregoing purpose, you may not use, reproduce, copy, prepare derivative
   works of, modify, distribute, perform, display or sell this Software and/or
   its documentation for any purpose.

   YOU FURTHER ACKNOWLEDGE AND AGREE THAT THE SOFTWARE AND DOCUMENTATION ARE
   PROVIDED 揂S IS?WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS OR IMPLIED,
   INCLUDING WITHOUT LIMITATION, ANY WARRANTY OF MERCHANTABILITY, TITLE,
   NON-INFRINGEMENT AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL
   TEXAS INSTRUMENTS OR ITS LICENSORS BE LIABLE OR OBLIGATED UNDER CONTRACT,
   NEGLIGENCE, STRICT LIABILITY, CONTRIBUTION, BREACH OF WARRANTY, OR OTHER
   LEGAL EQUITABLE THEORY ANY DIRECT OR INDIRECT DAMAGES OR EXPENSES
   INCLUDING BUT NOT LIMITED TO ANY INCIDENTAL, SPECIAL, INDIRECT, PUNITIVE
   OR CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA, COST OF PROCUREMENT
   OF SUBSTITUTE GOODS, TECHNOLOGY, SERVICES, OR ANY CLAIMS BY THIRD PARTIES
   (INCLUDING BUT NOT LIMITED TO ANY DEFENSE THEREOF), OR OTHER SIMILAR COSTS.

   Should you have any questions regarding your right to use this Software,
   contact Texas Instruments Incorporated at www.TI.com.
 **************************************************************************************************/

 /*********************************************************************
  * INCLUDES
  */

 #include "bcomdef.h"
 #include "OSAL.h"
 #include "OSAL_PwrMgr.h"

 #include "OnBoard.h"
 #include "hal_adc.h"
 #include "hal_led.h"
 #include "hal_key.h"
 #include "hal_lcd.h"

 #include "gatt.h"

 #include "hci.h"

 #include "gapgattserver.h"
 #include "gattservapp.h"
 #include "devinfoservice.h"
 #include "simpleGATTprofile.h"
 #include "ds18b20.h"
 #include "stdio.h"
 #include "oled.h"

 #if defined( CC2540_MINIDK )
   #include "simplekeys.h"
 #endif

 #include "peripheral.h"

 #include "gapbondmgr.h"

 #include "simpleBLEPeripheral.h"

 #if defined FEATURE_OAD
   #include "oad.h"
   #include "oad_target.h"
 #endif

 /*********************************************************************
  * MACROS
  */

 /*********************************************************************
  * CONSTANTS
  */

 // How often to perform periodic event
 #define SBP_PERIODIC_EVT_PERIOD                   5000
 #define SBP_TEMP_EVT_PERIOD                   500

 // What is the advertising interval when device is discoverable (units of 625us, 160=100ms)
 #define DEFAULT_ADVERTISING_INTERVAL          160

 // Limited discoverable mode advertises for 30.72s, and then stops
 // General discoverable mode advertises indefinitely

 #if defined ( CC2540_MINIDK )
 #define DEFAULT_DISCOVERABLE_MODE             GAP_ADTYPE_FLAGS_LIMITED
 #else
 #define DEFAULT_DISCOVERABLE_MODE             GAP_ADTYPE_FLAGS_GENERAL
 #endif  // defined ( CC2540_MINIDK )

 // Minimum connection interval (units of 1.25ms, 80=100ms) if automatic parameter update request is enabled
 #define DEFAULT_DESIRED_MIN_CONN_INTERVAL     80

 // Maximum connection interval (units of 1.25ms, 800=1000ms) if automatic parameter update request is enabled
 #define DEFAULT_DESIRED_MAX_CONN_INTERVAL     800

 // Slave latency to use if automatic parameter update request is enabled
 #define DEFAULT_DESIRED_SLAVE_LATENCY         0

 // Supervision timeout value (units of 10ms, 1000=10s) if automatic parameter update request is enabled
 #define DEFAULT_DESIRED_CONN_TIMEOUT          1000

 // Whether to enable automatic parameter update request when a connection is formed
 #define DEFAULT_ENABLE_UPDATE_REQUEST         TRUE

 // Connection Pause Peripheral time value (in seconds)
 #define DEFAULT_CONN_PAUSE_PERIPHERAL         6

 // Company Identifier: Texas Instruments Inc. (13)
 #define TI_COMPANY_ID                         0x000D

 #define INVALID_CONNHANDLE                    0xFFFF

 // Length of bd addr as a string
 #define B_ADDR_STR_LEN                        15

 /*********************************************************************
  * TYPEDEFS
  */

 /*********************************************************************
  * GLOBAL VARIABLES
  */

 /*********************************************************************
  * EXTERNAL VARIABLES
  */

 /*********************************************************************
  * EXTERNAL FUNCTIONS
  */

 /*********************************************************************
  * LOCAL VARIABLES
  */
 static uint8 simpleBLEPeripheral_TaskID;   // Task ID for internal task/event processing

 static gaprole_States_t gapProfileState = GAPROLE_INIT;

 // GAP - SCAN RSP data (max size = 31 bytes)
 static uint8 scanRspData[] =
 {
   // complete name
   0x14,   // length of this data
   GAP_ADTYPE_LOCAL_NAME_COMPLETE,
   0x51,   // 'Q'
   0x69,   // 'i'
   0x6d,   // 'm'
   0x70,   // 'p'
   0x6c,   // 'l'
   0x65,   // 'e'
   0x42,   // 'B'
   0x4c,   // 'L'
   0x45,   // 'E'
   0x50,   // 'P'
   0x65,   // 'e'
   0x72,   // 'r'
   0x69,   // 'i'
   0x70,   // 'p'
   0x68,   // 'h'
   0x65,   // 'e'
   0x72,   // 'r'
   0x61,   // 'a'
   0x6c,   // 'l'

   // connection interval range
   0x05,   // length of this data
   GAP_ADTYPE_SLAVE_CONN_INTERVAL_RANGE,
   LO_UINT16( DEFAULT_DESIRED_MIN_CONN_INTERVAL ),   // 100ms
   HI_UINT16( DEFAULT_DESIRED_MIN_CONN_INTERVAL ),
   LO_UINT16( DEFAULT_DESIRED_MAX_CONN_INTERVAL ),   // 1s
   HI_UINT16( DEFAULT_DESIRED_MAX_CONN_INTERVAL ),

   // Tx power level
   0x02,   // length of this data
   GAP_ADTYPE_POWER_LEVEL,
          // 0dBm
 };

 // GAP - Advertisement data (max size = 31 bytes, though this is
 // best kept short to conserve power while advertisting)
 static uint8 advertData[] =
 {
   // Flags; this sets the device to use limited discoverable
   // mode (advertises for 30 seconds at a time) instead of general
   // discoverable mode (advertises indefinitely)
   0x02,   // length of this data
   GAP_ADTYPE_FLAGS,
   DEFAULT_DISCOVERABLE_MODE | GAP_ADTYPE_FLAGS_BREDR_NOT_SUPPORTED,

   // service UUID, to notify central devices what services are included
   // in this peripheral
   0x03,   // length of this data
   GAP_ADTYPE_16BIT_MORE,      // some of the UUID's, but not all
   LO_UINT16( SIMPLEPROFILE_SERV_UUID ),
   HI_UINT16( SIMPLEPROFILE_SERV_UUID ),

 };

 // GAP GATT Attributes
 static uint8 attDeviceName[GAP_DEVICE_NAME_LEN] = "Simple BLE Peripheral";

 /*********************************************************************
  * LOCAL FUNCTIONS
  */
 static void simpleBLEPeripheral_ProcessOSALMsg( osal_event_hdr_t *pMsg );
 static void simpleBLEPeripheral_ProcessGATTMsg( gattMsgEvent_t *pMsg );
 static void peripheralStateNotificationCB( gaprole_States_t newState );
 static void performPeriodicTask( void );
 static void simpleProfileChangeCB( uint8 paramID );

 #if defined( CC2540_MINIDK )
 static void simpleBLEPeripheral_HandleKeys( uint8 shift, uint8 keys );
 #endif

 #if (defined HAL_LCD) && (HAL_LCD == TRUE)
 static char *bdAddr2Str ( uint8 *pAddr );
 #endif // (defined HAL_LCD) && (HAL_LCD == TRUE)

 /*********************************************************************
  * PROFILE CALLBACKS
  */

 // GAP Role Callbacks
 static gapRolesCBs_t simpleBLEPeripheral_PeripheralCBs =
 {
   peripheralStateNotificationCB,  // Profile State Change Callbacks
   NULL                            // When a valid RSSI is read from controller (not used by application)
 };

 // GAP Bond Manager Callbacks
 static gapBondCBs_t simpleBLEPeripheral_BondMgrCBs =
 {
   NULL,                     // Passcode callback (not used by application)
   NULL                      // Pairing / Bonding state Callback (not used by application)
 };

 // Simple GATT Profile Callbacks
 static simpleProfileCBs_t simpleBLEPeripheral_SimpleProfileCBs =
 {
   simpleProfileChangeCB    // Charactersitic value change callback
 };
 /*********************************************************************
  * PUBLIC FUNCTIONS
  */

 /*********************************************************************
  * @fn      SimpleBLEPeripheral_Init
  *
  * @brief   Initialization function for the Simple BLE Peripheral App Task.
  *          This is called during initialization and should contain
  *          any application specific initialization (ie. hardware
  *          initialization/setup, table initialization, power up
  *          notificaiton ... ).
  *
  * @param   task_id - the ID assigned by OSAL.  This ID should be
  *                    used to send messages and set timers.
  *
  * @return  none
  */
 void SimpleBLEPeripheral_Init( uint8 task_id )
 {
   simpleBLEPeripheral_TaskID = task_id;

   osal_set_event(simpleBLEPeripheral_TaskID, SBP_START_TEMP_TIMER_EVT);
   // Setup the GAP
   VOID GAP_SetParamValue( TGAP_CONN_PAUSE_PERIPHERAL, DEFAULT_CONN_PAUSE_PERIPHERAL );

   // Setup the GAP Peripheral Role Profile
   {
     #if defined( CC2540_MINIDK )
       // For the CC2540DK-MINI keyfob, device doesn't start advertising until button is pressed
       uint8 initial_advertising_enable = FALSE;
     #else
       // For other hardware platforms, device starts advertising upon initialization
       uint8 initial_advertising_enable = TRUE;
     #endif

     // By setting this to zero, the device will go into the waiting state after
     // being discoverable for 30.72 second, and will not being advertising again
     // until the enabler is set back to TRUE
     uint16 gapRole_AdvertOffTime = ;

     uint8 enable_update_request = DEFAULT_ENABLE_UPDATE_REQUEST;
     uint16 desired_min_interval = DEFAULT_DESIRED_MIN_CONN_INTERVAL;
     uint16 desired_max_interval = DEFAULT_DESIRED_MAX_CONN_INTERVAL;
     uint16 desired_slave_latency = DEFAULT_DESIRED_SLAVE_LATENCY;
     uint16 desired_conn_timeout = DEFAULT_DESIRED_CONN_TIMEOUT;

     // Set the GAP Role Parameters
     GAPRole_SetParameter( GAPROLE_ADVERT_ENABLED, sizeof( uint8 ), &initial_advertising_enable );
     GAPRole_SetParameter( GAPROLE_ADVERT_OFF_TIME, sizeof( uint16 ), &gapRole_AdvertOffTime );

     GAPRole_SetParameter( GAPROLE_SCAN_RSP_DATA, sizeof ( scanRspData ), scanRspData );
     GAPRole_SetParameter( GAPROLE_ADVERT_DATA, sizeof( advertData ), advertData );

     GAPRole_SetParameter( GAPROLE_PARAM_UPDATE_ENABLE, sizeof( uint8 ), &enable_update_request );
     GAPRole_SetParameter( GAPROLE_MIN_CONN_INTERVAL, sizeof( uint16 ), &desired_min_interval );
     GAPRole_SetParameter( GAPROLE_MAX_CONN_INTERVAL, sizeof( uint16 ), &desired_max_interval );
     GAPRole_SetParameter( GAPROLE_SLAVE_LATENCY, sizeof( uint16 ), &desired_slave_latency );
     GAPRole_SetParameter( GAPROLE_TIMEOUT_MULTIPLIER, sizeof( uint16 ), &desired_conn_timeout );
   }

   // Set the GAP Characteristics
   GGS_SetParameter( GGS_DEVICE_NAME_ATT, GAP_DEVICE_NAME_LEN, attDeviceName );

   // Set advertising interval
   {
     uint16 advInt = DEFAULT_ADVERTISING_INTERVAL;

     GAP_SetParamValue( TGAP_LIM_DISC_ADV_INT_MIN, advInt );
     GAP_SetParamValue( TGAP_LIM_DISC_ADV_INT_MAX, advInt );
     GAP_SetParamValue( TGAP_GEN_DISC_ADV_INT_MIN, advInt );
     GAP_SetParamValue( TGAP_GEN_DISC_ADV_INT_MAX, advInt );
   }

   // Setup the GAP Bond Manager
   {
     uint32 passkey = ; // passkey "000000"
     uint8 pairMode = GAPBOND_PAIRING_MODE_WAIT_FOR_REQ;
     uint8 mitm = TRUE;
     uint8 ioCap = GAPBOND_IO_CAP_DISPLAY_ONLY;
     uint8 bonding = TRUE;
     GAPBondMgr_SetParameter( GAPBOND_DEFAULT_PASSCODE, sizeof ( uint32 ), &passkey );
     GAPBondMgr_SetParameter( GAPBOND_PAIRING_MODE, sizeof ( uint8 ), &pairMode );
     GAPBondMgr_SetParameter( GAPBOND_MITM_PROTECTION, sizeof ( uint8 ), &mitm );
     GAPBondMgr_SetParameter( GAPBOND_IO_CAPABILITIES, sizeof ( uint8 ), &ioCap );
     GAPBondMgr_SetParameter( GAPBOND_BONDING_ENABLED, sizeof ( uint8 ), &bonding );
   }

   // Initialize GATT attributes
   GGS_AddService( GATT_ALL_SERVICES );            // GAP
   GATTServApp_AddService( GATT_ALL_SERVICES );    // GATT attributes
   DevInfo_AddService();                           // Device Information Service
   SimpleProfile_AddService( GATT_ALL_SERVICES );  // Simple GATT Profile
 #if defined FEATURE_OAD
   VOID OADTarget_AddService();                    // OAD Profile
 #endif

   // Setup the SimpleProfile Characteristic Values
   {
     uint8 charValue1 = ;
     uint8 charValue2 = ;
     uint8 charValue3 = ;
     uint8 charValue4 = ;
     uint8 charValue5[SIMPLEPROFILE_CHAR5_LEN] = { , , , ,  };
     SimpleProfile_SetParameter( SIMPLEPROFILE_CHAR1, sizeof ( uint8 ), &charValue1 );
     SimpleProfile_SetParameter( SIMPLEPROFILE_CHAR2, sizeof ( uint8 ), &charValue2 );
     SimpleProfile_SetParameter( SIMPLEPROFILE_CHAR3, sizeof ( uint8 ), &charValue3 );
     SimpleProfile_SetParameter( SIMPLEPROFILE_CHAR4, sizeof ( uint8 ), &charValue4 );
     SimpleProfile_SetParameter( SIMPLEPROFILE_CHAR5, SIMPLEPROFILE_CHAR5_LEN, charValue5 );
   }

 #if defined( CC2540_MINIDK )

   SK_AddService( GATT_ALL_SERVICES ); // Simple Keys Profile

   // Register for all key events - This app will handle all key events
   RegisterForKeys( simpleBLEPeripheral_TaskID );

   // makes sure LEDs are off
   HalLedSet( (HAL_LED_1 | HAL_LED_2), HAL_LED_MODE_OFF );

   // For keyfob board set GPIO pins into a power-optimized state
   // Note that there is still some leakage current from the buzzer,
   // accelerometer, LEDs, and buttons on the PCB.

   P0SEL = ; // Configure Port 0 as GPIO
   P1SEL = ; // Configure Port 1 as GPIO
   P2SEL = ; // Configure Port 2 as GPIO

   P0DIR = 0xFC; // Port 0 pins P0.0 and P0.1 as input (buttons),
                 // all others (P0.2-P0.7) as output
   P1DIR = 0xFF; // All port 1 pins (P1.0-P1.7) as output
   P2DIR = 0x1F; // All port 1 pins (P2.0-P2.4) as output

   P0 = 0x03; // All pins on port 0 to low except for P0.0 and P0.1 (buttons)
   P1 = ;   // All pins on port 1 to low
   P2 = ;   // All pins on port 2 to low

 #endif // #if defined( CC2540_MINIDK )

 #if (defined HAL_LCD) && (HAL_LCD == TRUE)

 #if defined FEATURE_OAD
   #if defined (HAL_IMAGE_A)
     HalLcdWriteStringValue( , HAL_LCD_LINE_1 );
   #else
     HalLcdWriteStringValue( , HAL_LCD_LINE_1 );
   #endif // HAL_IMAGE_A
 #else
   HalLcdWriteString( "BLE Peripheral", HAL_LCD_LINE_1 );
 #endif // FEATURE_OAD

 #endif // (defined HAL_LCD) && (HAL_LCD == TRUE)

   // Register callback with SimpleGATTprofile
   VOID SimpleProfile_RegisterAppCBs( &simpleBLEPeripheral_SimpleProfileCBs );

   // Enable clock divide on halt
   // This reduces active current while radio is active and CC254x MCU
   // is halted
   HCI_EXT_ClkDivOnHaltCmd( HCI_EXT_ENABLE_CLK_DIVIDE_ON_HALT );

 #if defined ( DC_DC_P0_7 )

   // Enable stack to toggle bypass control on TPS62730 (DC/DC converter)
   HCI_EXT_MapPmIoPortCmd( HCI_EXT_PM_IO_PORT_P0, HCI_EXT_PM_IO_PORT_PIN7 );

 #endif // defined ( DC_DC_P0_7 )

   // Setup a delayed profile startup
   osal_set_event( simpleBLEPeripheral_TaskID, SBP_START_DEVICE_EVT );

 }

 float last_temp;
 /*********************************************************************
  * @fn      SimpleBLEPeripheral_ProcessEvent
  *
  * @brief   Simple BLE Peripheral Application Task event processor.  This function
  *          is called to process all events for the task.  Events
  *          include timers, messages and any other user defined events.
  *
  * @param   task_id  - The OSAL assigned task ID.
  * @param   events - events to process.  This is a bit map and can
  *                   contain more than one event.
  *
  * @return  events not processed
  */
 uint16 SimpleBLEPeripheral_ProcessEvent( uint8 task_id, uint16 events )
 {

   VOID task_id; // OSAL required parameter that isn't used in this function

   if ( events & SYS_EVENT_MSG )
   {
     uint8 *pMsg;

     if ( (pMsg = osal_msg_receive( simpleBLEPeripheral_TaskID )) != NULL )
     {
       simpleBLEPeripheral_ProcessOSALMsg( (osal_event_hdr_t *)pMsg );

       // Release the OSAL message
       VOID osal_msg_deallocate( pMsg );
     }

     // return unprocessed events
     return (events ^ SYS_EVENT_MSG);
   }

   if ( events & SBP_START_DEVICE_EVT )
   {
     // Start the Device
     VOID GAPRole_StartDevice( &simpleBLEPeripheral_PeripheralCBs );

     // Start Bond Manager
     VOID GAPBondMgr_Register( &simpleBLEPeripheral_BondMgrCBs );

     // Set timer for first periodic event
     osal_start_timerEx( simpleBLEPeripheral_TaskID, SBP_PERIODIC_EVT, SBP_PERIODIC_EVT_PERIOD );

     return ( events ^ SBP_START_DEVICE_EVT );
   }

   if ( events & SBP_PERIODIC_EVT )
   {
     // Restart timer
     if ( SBP_PERIODIC_EVT_PERIOD )
     {
       osal_start_timerEx( simpleBLEPeripheral_TaskID, SBP_PERIODIC_EVT, SBP_PERIODIC_EVT_PERIOD );
     }

     // Perform periodic application task
     performPeriodicTask();

     return (events ^ SBP_PERIODIC_EVT);
   }

   if(events & SBP_START_TEMP_TIMER_EVT) {
     if(SBP_TEMP_EVT_PERIOD)
     {
       osal_start_timerEx( simpleBLEPeripheral_TaskID, SBP_START_TEMP_TIMER_EVT, SBP_TEMP_EVT_PERIOD );
     }

     {
       uint16 numBytes;
       float ft;
       ];
       extern float DS18B20_ReadMain(void);
       P0SEL &= ~(BV());
       ft = DS18B20_ReadMain();
       printf("done.. %.1f\r\n", ft);
       //int len = sprintf(buf,">%.1f", ft);
        && ft > -) {
         if(last_temp!=ft) {
           oled_printf(FONT_32, ,,"    ", ft);
           oled_printf(FONT_32, ,,"%.1f", ft);
           last_temp = ft;
         }
       }

       ) {
           void relay_ctl(int id, int status);
           relay_ctl(,);
           relay_ctl(,);
           relay_ctl(,);
           relay_ctl(,);

           //red on
           P2DIR |= BV();
           P2SEL &=~(BV());
           P2_0 = ;

       } else {
           relay_ctl(,);
           relay_ctl(,);
           relay_ctl(,);
           relay_ctl(,);
           //red off
           P2DIR |= BV();
           P2SEL &=~(BV());
           P2_0 = ;
       }

     }
     return events ^ SBP_START_TEMP_TIMER_EVT;
   }

   printf("unknown events\r\n");
   // Discard unknown events
   ;
 }

 /*********************************************************************
  * @fn      simpleBLEPeripheral_ProcessOSALMsg
  *
  * @brief   Process an incoming task message.
  *
  * @param   pMsg - message to process
  *
  * @return  none
  */
 static void simpleBLEPeripheral_ProcessOSALMsg( osal_event_hdr_t *pMsg )
 {
   printf("on msg\r\n");
   switch ( pMsg->event )
   {
   #if defined( CC2540_MINIDK )
     case KEY_CHANGE:
       simpleBLEPeripheral_HandleKeys( ((keyChange_t *)pMsg)->state,
                                       ((keyChange_t *)pMsg)->keys );
       break;
   #endif // #if defined( CC2540_MINIDK )

     case GATT_MSG_EVENT:
       // Process GATT message
       simpleBLEPeripheral_ProcessGATTMsg( (gattMsgEvent_t *)pMsg );
       break;

     default:
       // do nothing
       break;
   }
 }

 #if defined( CC2540_MINIDK )
 /*********************************************************************
  * @fn      simpleBLEPeripheral_HandleKeys
  *
  * @brief   Handles all key events for this device.
  *
  * @param   shift - true if in shift/alt.
  * @param   keys - bit field for key events. Valid entries:
  *                 HAL_KEY_SW_2
  *                 HAL_KEY_SW_1
  *
  * @return  none
  */
 static void simpleBLEPeripheral_HandleKeys( uint8 shift, uint8 keys )
 {
   uint8 SK_Keys = ;

   VOID shift;  // Intentionally unreferenced parameter

   if ( keys & HAL_KEY_SW_1 )
   {
     SK_Keys |= SK_KEY_LEFT;
   }

   if ( keys & HAL_KEY_SW_2 )
   {

     SK_Keys |= SK_KEY_RIGHT;

     // if device is not in a connection, pressing the right key should toggle
     // advertising on and off
     // Note:  If PLUS_BROADCASTER is define this condition is ignored and
     //        Device may advertise during connections as well.
 #ifndef PLUS_BROADCASTER
     if( gapProfileState != GAPROLE_CONNECTED )
     {
 #endif // PLUS_BROADCASTER
       uint8 current_adv_enabled_status;
       uint8 new_adv_enabled_status;

       //Find the current GAP advertisement status
       GAPRole_GetParameter( GAPROLE_ADVERT_ENABLED, &current_adv_enabled_status );

       if( current_adv_enabled_status == FALSE )
       {
         new_adv_enabled_status = TRUE;
       }
       else
       {
         new_adv_enabled_status = FALSE;
       }

       //change the GAP advertisement status to opposite of current status
       GAPRole_SetParameter( GAPROLE_ADVERT_ENABLED, sizeof( uint8 ), &new_adv_enabled_status );
 #ifndef PLUS_BROADCASTER
     }
 #endif // PLUS_BROADCASTER
   }

   // Set the value of the keys state to the Simple Keys Profile;
   // This will send out a notification of the keys state if enabled
   SK_SetParameter( SK_KEY_ATTR, sizeof ( uint8 ), &SK_Keys );
 }
 #endif // #if defined( CC2540_MINIDK )

 /*********************************************************************
  * @fn      simpleBLEPeripheral_ProcessGATTMsg
  *
  * @brief   Process GATT messages
  *
  * @return  none
  */
 static void simpleBLEPeripheral_ProcessGATTMsg( gattMsgEvent_t *pMsg )
 {
   GATT_bm_free( &pMsg->msg, pMsg->method );
 }

 /*********************************************************************
  * @fn      peripheralStateNotificationCB
  *
  * @brief   Notification from the profile of a state change.
  *
  * @param   newState - new state
  *
  * @return  none
  */
 static void peripheralStateNotificationCB( gaprole_States_t newState )
 {
 #ifdef PLUS_BROADCASTER
   ;
 #endif // PLUS_BROADCASTER

   switch ( newState )
   {
     case GAPROLE_STARTED:
       {
         uint8 ownAddress[B_ADDR_LEN];
         uint8 systemId[DEVINFO_SYSTEM_ID_LEN];

         GAPRole_GetParameter(GAPROLE_BD_ADDR, ownAddress);

         // use 6 bytes of device address for 8 bytes of system ID value
         systemId[] = ownAddress[];
         systemId[] = ownAddress[];
         systemId[] = ownAddress[];

         // set middle bytes to zero
         systemId[] = 0x00;
         systemId[] = 0x00;

         // shift three bytes up
         systemId[] = ownAddress[];
         systemId[] = ownAddress[];
         systemId[] = ownAddress[];

         DevInfo_SetParameter(DEVINFO_SYSTEM_ID, DEVINFO_SYSTEM_ID_LEN, systemId);

         #if (defined HAL_LCD) && (HAL_LCD == TRUE)
           // Display device address
           HalLcdWriteString( bdAddr2Str( ownAddress ),  HAL_LCD_LINE_2 );
           HalLcdWriteString( "Initialized",  HAL_LCD_LINE_3 );
         #endif // (defined HAL_LCD) && (HAL_LCD == TRUE)
       }
       break;

     case GAPROLE_ADVERTISING:
       {
         #if (defined HAL_LCD) && (HAL_LCD == TRUE)
           HalLcdWriteString( "Advertising",  HAL_LCD_LINE_3 );
         #endif // (defined HAL_LCD) && (HAL_LCD == TRUE)
       }
       break;

 #ifdef PLUS_BROADCASTER
     /* After a connection is dropped a device in PLUS_BROADCASTER will continue
      * sending non-connectable advertisements and shall sending this change of
      * state to the application.  These are then disabled here so that sending
      * connectable advertisements can resume.
      */
     case GAPROLE_ADVERTISING_NONCONN:
       {
         uint8 advertEnabled = FALSE;

         // Disable non-connectable advertising.
         GAPRole_SetParameter(GAPROLE_ADV_NONCONN_ENABLED, sizeof(uint8),
                            &advertEnabled);

         // Reset flag for next connection.
         first_conn_flag = ;
       }
       break;
 #endif //PLUS_BROADCASTER         

     case GAPROLE_CONNECTED:
       {
         #if (defined HAL_LCD) && (HAL_LCD == TRUE)
           HalLcdWriteString( "Connected",  HAL_LCD_LINE_3 );
         #endif // (defined HAL_LCD) && (HAL_LCD == TRUE)

 #ifdef PLUS_BROADCASTER
         // Only turn advertising on for this state when we first connect
         // otherwise, when we go from connected_advertising back to this state
         // we will be turning advertising back on.
          )
         {
             uint8 advertEnabled = FALSE; // Turn on Advertising

             // Disable connectable advertising.
             GAPRole_SetParameter(GAPROLE_ADVERT_ENABLED, sizeof(uint8),
                                  &advertEnabled);

             // Set to true for non-connectabel advertising.
             advertEnabled = TRUE;

             // Enable non-connectable advertising.
             GAPRole_SetParameter(GAPROLE_ADV_NONCONN_ENABLED, sizeof(uint8),
                                  &advertEnabled);

             first_conn_flag = ;
         }
 #endif // PLUS_BROADCASTER
       }
       break;

     case GAPROLE_CONNECTED_ADV:
       {
         #if (defined HAL_LCD) && (HAL_LCD == TRUE)
           HalLcdWriteString( "Connected Advertising",  HAL_LCD_LINE_3 );
         #endif // (defined HAL_LCD) && (HAL_LCD == TRUE)
       }
       break;
     case GAPROLE_WAITING:
       {
         #if (defined HAL_LCD) && (HAL_LCD == TRUE)
           HalLcdWriteString( "Disconnected",  HAL_LCD_LINE_3 );
         #endif // (defined HAL_LCD) && (HAL_LCD == TRUE)

 #ifdef PLUS_BROADCASTER
         uint8 advertEnabled = TRUE;

         // Enabled connectable advertising.
         GAPRole_SetParameter(GAPROLE_ADVERT_ENABLED, sizeof(uint8),
                              &advertEnabled);
 #endif //PLUS_BROADCASTER
       }
       break;

     case GAPROLE_WAITING_AFTER_TIMEOUT:
       {
         #if (defined HAL_LCD) && (HAL_LCD == TRUE)
           HalLcdWriteString( "Timed Out",  HAL_LCD_LINE_3 );
         #endif // (defined HAL_LCD) && (HAL_LCD == TRUE)

 #ifdef PLUS_BROADCASTER
         // Reset flag for next connection.
         first_conn_flag = ;
 #endif //#ifdef (PLUS_BROADCASTER)
       }
       break;

     case GAPROLE_ERROR:
       {
         #if (defined HAL_LCD) && (HAL_LCD == TRUE)
           HalLcdWriteString( "Error",  HAL_LCD_LINE_3 );
         #endif // (defined HAL_LCD) && (HAL_LCD == TRUE)
       }
       break;

     default:
       {
         #if (defined HAL_LCD) && (HAL_LCD == TRUE)
           HalLcdWriteString( "",  HAL_LCD_LINE_3 );
         #endif // (defined HAL_LCD) && (HAL_LCD == TRUE)
       }
       break;

   }

   gapProfileState = newState;

 #if !defined( CC2540_MINIDK )
   VOID gapProfileState;     // added to prevent compiler warning with
                             // "CC2540 Slave" configurations
 #endif

 }

 /*********************************************************************
  * @fn      performPeriodicTask
  *
  * @brief   Perform a periodic application task. This function gets
  *          called every five seconds as a result of the SBP_PERIODIC_EVT
  *          OSAL event. In this example, the value of the third
  *          characteristic in the SimpleGATTProfile service is retrieved
  *          from the profile, and then copied into the value of the
  *          the fourth characteristic.
  *
  * @param   none
  *
  * @return  none
  */
 static void performPeriodicTask( void )
 {
   uint8 valueToCopy;
   uint8 stat;

   // Call to retrieve the value of the third characteristic in the profile
   stat = SimpleProfile_GetParameter( SIMPLEPROFILE_CHAR3, &valueToCopy);

   if( stat == SUCCESS )
   {
     /*
      * Call to set that value of the fourth characteristic in the profile. Note
      * that if notifications of the fourth characteristic have been enabled by
      * a GATT client device, then a notification will be sent every time this
      * function is called.
      */
     SimpleProfile_SetParameter( SIMPLEPROFILE_CHAR4, sizeof(uint8), &valueToCopy);
   }
 }

 /*********************************************************************
  * @fn      simpleProfileChangeCB
  *
  * @brief   Callback from SimpleBLEProfile indicating a value change
  *
  * @param   paramID - parameter ID of the value that was changed.
  *
  * @return  none
  */
 static void simpleProfileChangeCB( uint8 paramID )
 {
   uint8 newValue;

   switch( paramID )
   {
     case SIMPLEPROFILE_CHAR1:
       SimpleProfile_GetParameter( SIMPLEPROFILE_CHAR1, &newValue );

       #if (defined HAL_LCD) && (HAL_LCD == TRUE)
         HalLcdWriteStringValue( ,  HAL_LCD_LINE_3 );
       #endif // (defined HAL_LCD) && (HAL_LCD == TRUE)

       break;

     case SIMPLEPROFILE_CHAR3:
       SimpleProfile_GetParameter( SIMPLEPROFILE_CHAR3, &newValue );

       #if (defined HAL_LCD) && (HAL_LCD == TRUE)
         HalLcdWriteStringValue( ,  HAL_LCD_LINE_3 );
       #endif // (defined HAL_LCD) && (HAL_LCD == TRUE)

       break;

     default:
       // should not reach here!
       break;
   }
 }

 #if (defined HAL_LCD) && (HAL_LCD == TRUE)
 /*********************************************************************
  * @fn      bdAddr2Str
  *
  * @brief   Convert Bluetooth address to string. Only needed when
  *          LCD display is used.
  *
  * @return  none
  */
 char *bdAddr2Str( uint8 *pAddr )
 {
   uint8       i;
   char        hex[] = "0123456789ABCDEF";
   static char str[B_ADDR_STR_LEN];
   char        *pStr = str;

   *pStr++ = ';
   *pStr++ = 'x';

   // Start from end of addr
   pAddr += B_ADDR_LEN;

   ; i-- )
   {
     *pStr++ = hex[*--pAddr >> ];
     *pStr++ = hex[*pAddr & 0x0F];
   }

   *pStr = ;

   return str;
 }
 #endif // (defined HAL_LCD) && (HAL_LCD == TRUE)

 /*********************************************************************
 *********************************************************************/