ble uart client

功能简介

uart client接合uart server实现两个蓝牙设备间的透传，uart client和uart server连接成功后，client等待server发送数据，当client检测到server发送的数据时，将数据回写给server。

设置对端地扯

const static struct gap_bdaddr slave_add =
{
   .addr.addr = SLAVE_ADDR,
   .addr_type = 0,
};

slave_add为要连接的对端设备地扯和地扯类型，即uart server的地扯和地扯类型。

ble 协议栈和应用协议栈的信息交互

static osapp_msg_handler_table_t osapp_svc_handler_table[] =
{
    {APM_CMP_EVT,(osapp_msg_handler_t)osapp_gapm_cmp_evt_handler},
    {GAPM_ADV_REPORT_IND, (osapp_msg_handler_t)osapp_gapm_scan_adv_report_ind_handler},
    {GATTC_EVENT_IND, (osapp_msg_handler_t)osapp_event_ind_handler},
    {GATTC_SDP_SVC_IND, (osapp_msg_handler_t)osapp_sdp_disc_ind_handler},
    {GATTC_CMP_EVT,(osapp_msg_handler_t)osapp_gattc_cmp_evt_handler},
};

当uart client收到uart server notify过来的数据时，协议栈通过GATTC_EVENT_IND通知应用程序，然后调用osapp_event_ind_handler函数，在该函数里可以获取uart server发过来的数据。

uart client发送数据接口

static void osapp_gatt_write(uint8_t op, uint8_t hdl, uint8_t conn_id, uint8_t length, const uint8_t* pdat)// write no respose
{
    static uint16_t seq_num = 0;
    struct gattc_write_cmd* cmd  = AHI_MSG_ALLOC_DYN(GATTC_WRITE_CMD, KE_BUILD_ID(TASK_ID_GATTC, conn_id), gattc_write_cmd, length);
    memset(cmd, 0, (sizeof(struct gattc_write_cmd)+length));
    cmd->operation = op;
    cmd->auto_execute = 1;
    cmd->seq_num = seq_num++;
    cmd->handle = hdl;
    cmd->offset = 0;
    cmd->length = length;
    cmd->cursor = 0;
    memcpy(cmd->value, pdat, length);
    os_ahi_msg_send(cmd,portMAX_DELAY);
}

当连接成功后，并且也已经成功发现对端设备上的服务后，就可以调用该函数发送数据给uart server。