KW36入门学习（六、开机后自动广播）

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KW36入门学习（六、开机后自动广播）

由于nxp提供的例程基本都得按下按键sw2后，才会有广播。这样对于自己设计的板子上没有按键的就很受伤，所以这里讲如何让板子上电后不用按按键，就直接广播看现象。

首先得知道在哪里修改，查看程序流程

main_task-》 App_Thread-》 App_HandleHostMessageInput-》 BleApp_GenericCallback

前面的都是在Appmian文件里，对于所有的蓝牙工程都是用的它，所以真正程序开始做自己的是在最后这个步骤，在这个环境下有如下情况。

typedef enum gapGenericEventType_tag {
    gInitializationComplete_c,                  /*!< Initial setup started by Ble_HostInitialize is complete. */
    gInternalError_c,                           /*!< An internal error occurred. */
    gAdvertisingSetupFailed_c,                  /*!< Error during advertising setup. */
    gAdvertisingParametersSetupComplete_c,      /*!< Advertising parameters have been successfully set. Response to Gap_SetAdvertisingParameters. */
    gAdvertisingDataSetupComplete_c,            /*!< Advertising and/or scan response data has been successfully set. Response to Gap_SetAdvertisingData. */
    gWhiteListSizeRead_c,                       /*!< Contains the White List size. Response to Gap_ReadWhiteListSize. */
    gDeviceAddedToWhiteList_c,                  /*!< Device has been added to White List. Response to Gap_AddDeviceToWhiteList. */
    gDeviceRemovedFromWhiteList_c,              /*!< Device has been removed from the White List. Response to Gap_RemoveDeviceFromWhiteList. */
    gWhiteListCleared_c,                        /*!< White List has been cleared. Response to Gap_ClearWhiteList. */
    gRandomAddressReady_c,                      /*!< A random device address has been created. Response to Gap_CreateRandomDeviceAddress. */
    gCreateConnectionCanceled_c,                /*!< Connection initiation was successfully cancelled. Response to Gap_CancelInitiatingConnection. */
    gPublicAddressRead_c,                       /*!< Contains the public device address. Response to Gap_ReadPublicDeviceAddress. */
    gAdvTxPowerLevelRead_c,                     /*!< Contains the TX power on the advertising channel. Response to Gap_ReadAdvertisingTxPowerLevel. */
    gPrivateResolvableAddressVerified_c,        /*!< Contains the result of PRA verification. Response to Gap_VerifyPrivateResolvableAddress. */
    gRandomAddressSet_c,                        /*!< Random address has been set into the Controller. Response to Gap_SetRandomAddress. */
    gControllerResetComplete_c,                 /*!< Controller has been successfully reset. */
    gLeScPublicKeyRegenerated_c,                /*!< The private/public key pair used for LE Secure Connections pairing has been regenerated. */
    gLeScLocalOobData_c,                        /*!< Local OOB data used for LE Secure Connections pairing. */
    gHostPrivacyStateChanged_c,                 /*!< Host Privacy was enabled or disabled. */
    gControllerPrivacyStateChanged_c,           /*!< Controller Privacy was enabled or disabled. */
    gControllerTestEvent_c,                     /*!< Controller Test was started or stopped. */
    gTxPowerLevelSetComplete_c,                 /*!< Controller Tx Power Level set complete or invalid. */
    gLePhyEvent_c                               /*!< Phy Mode of a connection has been updated by the Controller. */
} gapGenericEventType_t;

在hrs工程里用的是红色的标记， gInitializationComplete_c 会去配置应用层，gAdvertisingParametersSetupComplete_c 会去处理广播事件，连接事件。这里我们希望当蓝牙数据设置完成后就开始广播（这个就是我们想去执行的），为了处罚广播事件，添加gAdvertisingDataSetupComplete_c 。添加的具体内容参考按键里面的，增加 BleApp_Start();具体修改如下

void BleApp_GenericCallback (gapGenericEvent_t* pGenericEvent)
{
    /* Call BLE Conn Manager */
    BleConnManager_GenericEvent(pGenericEvent);

    switch (pGenericEvent->eventType)
    {
        case gInitializationComplete_c:
        {
            BleApp_Config();
        }
        break;

        case gAdvertisingParametersSetupComplete_c:
        {
            App_StartAdvertising(BleApp_AdvertisingCallback, BleApp_ConnectionCallback);
        }
        break;
   
        case gAdvertisingDataSetupComplete_c:
        {            
            BleApp_Start();
        }
        break;


        default:
            break;
    }
}

到这里其实只是配置好了广播参数，这里的都是准备工作为了促发广播事件，看BleApp_Start到底做了什么

BleApp_Start()-》BleApp_Advertise-》Gap_SetAdvertisingParameters

再分析App_StartAdvertising，所以最后广播在Gap_StartAdvertising这里启动

App_StartAdvertising-》Gap_StartAdvertising

这样download程序后，直接可以看到广播了，好处是方便调试。



文章出处：CSDN

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