CC2640 MAC地址理解、使用和更改

说明：一般BLE在出厂时都有唯一的标识地址，俗称MAC地址，其在广播时，随设备名一起广播出去。请看用Packet Sniffer抓包结果：

ADVA ：0X0AD0AD0AD0AD 就是MAC 地址。

可以修改,对应代码如下：

static void SimpleBLEPeripheral_init(void)

{

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

  // N0 STACK API CALLS CAN OCCUR BEFORE THIS CALL TO ICall_registerApp

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

  // Register the current thread as an ICall dispatcher application

  // so that the application can send and receive messages.

  ICall_registerApp(&selfEntity, &sem);           //ICall 注册当前线程任务

  // 以下功能为修改mac地址

  // Hard code the BD Address till CC2650 board gets its own IEEE address

  uint8 bdAddress[B_ADDR_LEN] = { 0xAD, 0xD0, 0x0A, 0xAD, 0xD0, 0x0A };

  HCI_EXT_SetBDADDRCmd(bdAddress);

  // Set device's Sleep Clock Accuracy

  HCI_EXT_SetSCACmd(40);

  // Create an RTOS queue for message from profile to be sent to app.

  appMsgQueue = Util_constructQueue(&appMsg); //建立与RTOS队列

其中：bdAddress[B_ADDR_LEN] 为要修改的MAC地址数组，B_ADDR_LEN为MAC地址数组长度，一般为6.

HCI_EXT_SetBDADDRCmd(bdAddress);执行MAC地址修改。执行之后要延时一段时间。使用函数HCI_EXT_SetSCACmd(40);

由函数可知 MAC地址的实现一般都是由HCI层来进行的。

如果将这两行代码屏蔽后会有什么现象呢？

static void SimpleBLEPeripheral_init(void)

{

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

  // N0 STACK API CALLS CAN OCCUR BEFORE THIS CALL TO ICall_registerApp

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

  // Register the current thread as an ICall dispatcher application

  // so that the application can send and receive messages.

  ICall_registerApp(&selfEntity, &sem);           //ICall 注册当前线程任务

  // 以下功能为修改mac地址

  // Hard code the BD Address till CC2650 board gets its own IEEE address

  //uint8 bdAddress[B_ADDR_LEN] = { 0xAD, 0xD0, 0x0A, 0xAD, 0xD0, 0x0A };

  //HCI_EXT_SetBDADDRCmd(bdAddress);

  // Set device's Sleep Clock Accuracy

  //HCI_EXT_SetSCACmd(40);

  // Create an RTOS queue for message from profile to be sent to app.

  appMsgQueue = Util_constructQueue(&appMsg); //建立与RTOS队列

Packet Sniffer 抓包结果如下：

此时AdvA：0XA0E6F807ACD2。此为本BLE默认的MAC地址。