ble broadcaster demo

示例说明

• 如何设置 ble broadcaster 角色

  • 参考: ble 角色设置

• 如何处理 ble 协议栈和应用协议栈的信息交互

  • 参考: ble 协议栈和应用协议栈的信息交互

• 如何更新广播内容

  • 参考: ble 更新广播内容

执行流程

1. 用户自己函数入口

在 ble_user_main.c 中， osapp_user_main_init()初始化自己数据。

2. 开启ble协议栈调度

在用户函数执行完后，调用 osapp_ble_stack_run(),开启ble协议栈调度。

3. 示例伪代码

void osapp_user_main_init(void)
{
        ///user data init
        {
                //do ...

        }
        ///ble stack run
        osapp_ble_stack_run();

        LOG(LOG_LVL_INFO,"ble user run\n");
}

ble 角色设置

设置流程

void osapp_ble_stack_run(void)
{
         osapp_ble_stack_data_init();
         osapp_set_dev_config(GAP_ROLE_BROADCASTER,GAPM_CFG_ADDR_PUBLIC,GAPM_PAIRING_LEGACY,BLE_PERIPHERAL_MAX_MTU);
         LOG(LOG_LVL_INFO,"osapp_ble_stack_run\n");
}

1. 初始化内部数据

static void osapp_ble_stack_data_init(void)
{
        broadcaster_env.Timer =  xTimerCreate("ADVTimer",APP_ADV_UPDATE_PERIOD,pdTRUE,(void *) 0,osapp_advdata_change_handler);
        BX_ASSERT(broadcaster_env.Timer!=NULL);

        broadcaster_env.test_num = 0;
}

2. 设置设备的 角色设置

osapp_set_dev_config(GAP_ROLE_BROADCASTER,GAPM_CFG_ADDR_PUBLIC,GAPM_PAIRING_LEGACY,BLE_PERIPHERAL_MAX_MTU);

static int32_t osapp_set_dev_config(uint8_t role,uint8_t addr_type,uint8_t pairing_mode,uint16_t max_mtu)
{
        // Set Device configuration
        struct gapm_set_dev_config_cmd* cmd = AHI_MSG_ALLOC(GAPM_SET_DEV_CONFIG_CMD,TASK_ID_GAPM,gapm_set_dev_config_cmd);

        memset(cmd, 0 , sizeof(struct gapm_set_dev_config_cmd));

        cmd->operation = GAPM_SET_DEV_CONFIG;
        cmd->role      = role;

        // Set Data length parameters
        cmd->sugg_max_tx_octets = BLE_MIN_OCTETS;
        cmd->sugg_max_tx_time   = BLE_MIN_TIME;
        cmd->max_mtu = max_mtu;
        cmd->addr_type = addr_type;
        cmd->pairing_mode = pairing_mode;

        return osapp_msg_build_send(cmd, sizeof(struct gapm_set_dev_config_cmd));
}

3. 协议栈开始完整运行

。。。。

ble 协议栈和应用协议栈的信息交互

实现消息交互的处理函数

/**
 * @brief message and handler table. This define the connection of message and it's callback.
 */
static const osapp_msg_handler_table_t handler_table[]=
{
        [0] =   {KE_MSG_DEFAULT_HANDLER,(osapp_msg_handler_t)osapp_default_msg_handler},
           ///GAPM event complete
           {GAPM_CMP_EVT,(osapp_msg_handler_t)osapp_gapm_cmp_evt_handler},
           ///ble power on ready and should do a reset
           {GAPM_DEVICE_READY_IND,(osapp_msg_handler_t)osapp_device_ready_ind_handler},
           ///trigger when master need to read device information uuid 0x1800
           {GAPC_GET_DEV_INFO_REQ_IND,(osapp_msg_handler_t)osapp_gapc_get_dev_info_req_ind_handler},
};

const osapp_msg_handler_info_t handler_info = ARRAY_INFO(handler_table);

ble 更新广播内容

广播开启后，内部开启了一个1秒的软件定时器，定时更新广播内容

static int32_t osapp_update_advertise_data(uint8_t index)
{
        struct gapm_update_advertise_data_cmd *cmd = AHI_MSG_ALLOC(GAPM_UPDATE_ADVERTISE_DATA_CMD,TASK_ID_GAPM, gapm_update_advertise_data_cmd);

        cmd->operation = GAPM_UPDATE_ADVERTISE_DATA;
        cmd->adv_data_len = 0;

        memcpy(&cmd->adv_data[cmd->adv_data_len],
                   OSAPP_BX_ADV_DATA_UUID, OSAPP_BX_ADV_DATA_UUID_LEN);
        cmd->adv_data_len += OSAPP_BX_ADV_DATA_UUID_LEN;

        cmd->adv_data[cmd->adv_data_len] = OSAPP_DATA_TOTAL_LEN-2-OSAPP_BX_ADV_DATA_UUID_LEN+1;
        cmd->adv_data[cmd->adv_data_len+1] = '\x08';

        index %= 4;//(0~3)
        index +=1;//(1~4)

        switch (index)
        {
                case 1:
                        LOG(LOG_LVL_INFO,"change1\n");
                        memcpy(&cmd->adv_data[6],OSAPP_DEVICE_NAME_CHG1,OSAPP_DEVICE_NAME_CHG1_LEN);
                        cmd->adv_data_len = OSAPP_DATA_TOTAL_LEN;
                        break;
                case 2:
                        LOG(LOG_LVL_INFO,"change2\n");
                        memcpy(&cmd->adv_data[6],OSAPP_DEVICE_NAME_CHG2,OSAPP_DEVICE_NAME_CHG2_LEN);
                        cmd->adv_data_len = OSAPP_DATA_TOTAL_LEN;
                        break;
                case 3:
                        LOG(LOG_LVL_INFO,"change3\n");
                        memcpy(&cmd->adv_data[6],OSAPP_DEVICE_NAME_CHG3,OSAPP_DEVICE_NAME_CHG3_LEN);
                        cmd->adv_data_len = OSAPP_DATA_TOTAL_LEN;
                        break;
                case 4:
                        LOG(LOG_LVL_INFO,"change4\n");
                        memcpy(&cmd->adv_data[6],OSAPP_DEVICE_NAME_CHG4,OSAPP_DEVICE_NAME_CHG4_LEN);
                        cmd->adv_data_len = OSAPP_DATA_TOTAL_LEN;
                        break;
                default:
                        break;
        }


        cmd->scan_rsp_data_len  = OSAPP_SCNRSP_DATA_CHG_LEN;
        memcpy(&cmd->scan_rsp_data[0],OSAPP_SCNRSP_DATA_CHG,cmd->scan_rsp_data_len);

        return osapp_msg_build_send(cmd,sizeof(struct gapm_update_advertise_data_cmd));

}