蓝牙BLE从机Peripheral讲解十（128bit&noti）

前言：

针对从机服务使用128bit并增加一个noti属性进行讲解。

一、在gattprofile.c中修改

数组修改：

static gattAttribute_t simpleProfileAttrTbl[] = {
    // Simple Profile Service
    {
        {ATT_BT_UUID_SIZE, primaryServiceUUID}, /* type */
        GATT_PERMIT_READ,                       /* permissions */
        0,                                      /* handle */
        (uint8_t *)&simpleProfileService        /* pValue */
    },

    // Characteristic 1 Declaration
    {
        {ATT_BT_UUID_SIZE, characterUUID},
        GATT_PERMIT_READ,
        0,
        &simpleProfileChar1Props},

    // Characteristic Value 1                        //TESTADD：修改
    {                                                        
        {ATT_UUID_SIZE, simpleProfilechar1UUID},                       
        GATT_PERMIT_READ | GATT_PERMIT_WRITE,
        0,
        simpleProfileChar1},

    // Characteristic 1 configuration                //TESTADD：添加
    {
        {ATT_BT_UUID_SIZE, clientCharCfgUUID},
        GATT_PERMIT_READ | GATT_PERMIT_WRITE,
        0,
        (uint8_t *)simpleProfileChar1Config},

    // Characteristic 1 User Description
    {
        {ATT_BT_UUID_SIZE, charUserDescUUID},
        GATT_PERMIT_READ,
        0,
        simpleProfileChar1UserDesp},
    ......

 对应value数组指定

// Position of simpleProfilechar4 value in attribute array
#define SIMPLEPROFILE_CHAR4_VALUE_POS    12 // TESTADD:对应数组的Characteristic Value 4    数组的第12个为value
#define SIMPLEPROFILE_CHAR1_VALUE_POS    2  // TESTADD:对应数组的Characteristic Value 1    数组的第2个为value

 修改char1属性，此处修改后，使用APP连接则会有对应的接口模型出来。

static uint8_t simpleProfileChar1Props = GATT_PROP_WRITE | GATT_PROP_WRITE_NO_RSP | GATT_PROP_NOTIFY | GATT_PROP_INDICATE;    //TESTADD:此变量即Characteristic 1 Declaration中调用的

 添加CCCD

bStatus_t SimpleProfile_AddService(uint32_t services)
{
    uint8_t status = SUCCESS;

    // Initialize Client Characteristic Configuration attributes
    GATTServApp_InitCharCfg(INVALID_CONNHANDLE, simpleProfileChar4Config);
    GATTServApp_InitCharCfg(INVALID_CONNHANDLE, simpleProfileChar1Config);    //TESTADD：使能其cccd功能

    // Register with Link DB to receive link status change callback
    linkDB_Register(simpleProfile_HandleConnStatusCB);

    if(services & SIMPLEPROFILE_SERVICE)
    {
        // Register GATT attribute list and CBs with GATT Server App
        status = GATTServApp_RegisterService(simpleProfileAttrTbl,
                                             GATT_NUM_ATTRS(simpleProfileAttrTbl),
                                             GATT_MAX_ENCRYPT_KEY_SIZE,
                                             &simpleProfileCBs);
    }

    return (status);
}

 添加char1的noti功能，即进行收发的接口函数

bStatus_t simpleProfile1_Notify(uint16_t connHandle, attHandleValueNoti_t *pNoti)
{
    uint16_t value = GATTServApp_ReadCharCfg(connHandle, simpleProfileChar1Config);

    // If notifications enabled
    if(value & GATT_CLIENT_CFG_NOTIFY)
    {
        // Set the handle
        pNoti->handle = simpleProfileAttrTbl[SIMPLEPROFILE_CHAR1_VALUE_POS].handle;

        // Send the notification
        return GATT_Notification(connHandle, pNoti, FALSE);
    }
    return bleIncorrectMode;
}

回调函数添加char1的属性

static void simpleProfile_HandleConnStatusCB(uint16_t connHandle, uint8_t changeType)
{
    // Make sure this is not loopback connection
    if(connHandle != LOOPBACK_CONNHANDLE)
    {
        // Reset Client Char Config if connection has dropped
        if((changeType == LINKDB_STATUS_UPDATE_REMOVED) ||
           ((changeType == LINKDB_STATUS_UPDATE_STATEFLAGS) &&
            (!linkDB_Up(connHandle))))
        {
            GATTServApp_InitCharCfg(connHandle, simpleProfileChar4Config);
            GATTServApp_InitCharCfg(connHandle, simpleProfileChar1Config);    //TESTADD
        }
    }
}

二、在peripheral.c中修改

这里涉及的是真正的收发窗口，直接模拟char4原本的函数，并调用即可

static void peripheralChar1Notify(uint8_t *pValue, uint16_t len)
{
    printf("len = %d\n", len);
    attHandleValueNoti_t noti;
    if(len > (peripheralMTU - 3))
    {
        PRINT("Too large noti\n");
        return;
    }
    noti.len = len;
    noti.pValue = GATT_bm_alloc(peripheralConnList.connHandle, ATT_HANDLE_VALUE_NOTI, noti.len, NULL, 0);
    if(noti.pValue)
    {
        tmos_memcpy(noti.pValue, pValue, noti.len);
        if(simpleProfile1_Notify(peripheralConnList.connHandle, &noti) != SUCCESS)
        {
            GATT_bm_free((gattMsg_t *)&noti, ATT_HANDLE_VALUE_NOTI);
        }
    }
}

三、截图查看修改的点