如何使用 CC2540 制作一个 iBeacon

准备工作

1. 一台 PC
2. IAR Embedded Workbench 集成开发环境，可以用30天试用版本。
3. 支持 蓝牙 4.0 的智能手机一部，并安装下列应用之一
   • Android Google Play Store.
   • iPhone  App Store.
4. CC2540 开发板
5. CCDebugger 下载器

创建 iBeacon 工程文档

• 安装 TI 官方的 CC254x 开发环境
• 复制 C:\Texas Instruments\BLE-CC254x-1.3.2\Projects\ble\SimpleBLEBroadcaster 文件夹
• 粘贴到：C:\Texas Instruments\BLE-CC254x-1.3.2\Projects\ble\iBeacon
• 运行 IAR Embedded Workbench，点击 File > Open > Workspace

修改源代码

simpleBLEBroadcaster.c

// 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,
  GAP_ADTYPE_FLAGS_BREDR_NOT_SUPPORTED,

  // three-byte broadcast of the data "1 2 3"
  0x04,   // length of this data including the data type byte
  GAP_ADTYPE_MANUFACTURER_SPECIFIC,      // manufacturer specific advertisement data type
  1,
  2,
  3
};

修改下面关键字

• UID: E2C56DB5-DFFB-48D2-B060-D0F5A71096E0
• Major: 1 (0x0001)
• Minor: 1 (0x0001)
• Measured Power: -59 (0xc5)

// GAP - Advertisement data (max size = 31 bytes, though this is
// best kept short to conserve power while advertisting)
static uint8 advertData[] =
{
  // 25 byte ibeacon advertising data
  // Preamble: 0x4c000215
  // UUID: E2C56DB5-DFFB-48D2-B060-D0F5A71096E0
  // Major: 1 (0x0001)
  // Minor: 1 (0x0001)
  // Measured Power: -59 (0xc5)
  0x1A, // length of this data including the data type byte
  GAP_ADTYPE_MANUFACTURER_SPECIFIC, // manufacturer specific advertisement data type
  0x4c,
  0x00,
  0x02,
  0x15,
  0xe2,
  0xc5,
  0x6d,
  0xb5,
  0xdf,
  0xfb,
  0x48,
  0xd2,
  0xb0,
  0x60,
  0xd0,
  0xf5,
  0xa7,
  0x10,
  0x96,
  0xe0,
  0x00,
  0x01,
  0x00,
  0x01,
  0xc5
};

接下来修改广播类型，将下面代码

//uint8 advType = GAP_ADTYPE_ADV_NONCONN_IND;// use non-connectable advertisements
uint8 advType = GAP_ADTYPE_ADV_DISCOVER_IND; // use scannable unidirected advertisements

修改为

uint8 advType = GAP_ADTYPE_ADV_NONCONN_IND;   // use non-connectable advertisements
//uint8 advType = GAP_ADTYPE_ADV_DISCOVER_IND; // use scannable unidirected advertisements

接下来修改 GAP

// 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_ADV_EVENT_TYPE, sizeof( uint8 ), &advType );

因为 iBeacon 必须不间断广播，并且不响应任何数据请求，所以我们要修改 GAPROLE_ADVERT_OFF_TIME 和 GAPROLE_SCAN_RSP_DATA。

// 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_ADV_EVENT_TYPE, sizeof( uint8 ), &advType );

保存工程后，进行编译，并通过 CCDebugger 下载程序到开发板中。

1. Select Project > Clean to clean the project.
2. Select Project > Make to make the project.
3. Select Project > Download and Debug to send the code to the CC2540 Key Fob
4. Select Debug > Go to Run the code on the CC2540 Key Fob