var intervar;
    // var tcom = null;
    $(function () {
        comlist();
    })

    //获取端口的列表
    function comlist() {
        try {
            $.get(
                "http://127.0.0.1:8333/comlist",
                function (result) {
                    // console.log(result);
                    if (result.ports.length > 0) {
                        $(result.ports).each(function (i) {
                            $("<option value='" + result.ports[i].name + "'>" + result.ports[i].name  + "</option>").insertBefore($("#comli option:first"))
                        })
                        document.getElementById("comli").selectedIndex = 0;
                    }
                }
            )
        } catch (err) {
            console.log(err);
        }
    }

    //关闭端口
    function closeCom() {
        try {
            clearInterval(intervar);
            console.log("close");
            $.get(
                "http://127.0.0.1:8333/close",
                function (result) {
                    return result;
                }
            )
        } catch (err) {
            //console.log(err);
        }
    }

    //打开端口
    var CUR_SJT = "";
    function selComPort() {
        try {
            CUR_SJT = $("#character_encode").val();
            var comNo = 0;
            if ($("#comli").val() != "-1") {
                comNo = $("#comli").val();
            } else {
                alert("请选择端口");
                return;
            }

            if ($("#btn_open").val() == "Close") {
                setTimeout(() => {closeCom()}, 0);
                $("#btn_open").val("Open");
                $("#com_setting_div").show();
                return;
            } else {
                setTimeout(() => {
                    var port_info={
                        "port":comNo,
                        "baudrate":parseInt($("#baud_rate").val()),
                        "databits":parseInt($("#data_bit").val()),
                        "parity":$("#parity_bit").val(),
                        "stopbits":$("#stop_bit").val(),
                        "expected":"\\r",
                        "timeout":5
                    }
                    $.ajax({
                        url: "http://127.0.0.1:8333/open",
                        data: JSON.stringify(port_info), //方法二   测试ok
                        method: "post",
                        dataType: "json",
                        contentType: 'application/json',
                        success: function (data) {
                            if(data['status']=='success'){
                                //ok
                                $("#btn_open").val("Close");
                                $("#com_setting_div").hide();
                                intervar = setInterval(function(){
                                    $.get(
                                        "http://127.0.0.1:8333/read",
                                        function (result) {
                                            if(result.stat){console.log(result)};
                                            if(result['data']){
                                                var res=$.trim(result['data'].replace("+","").replace("'",""));
                                                var pattern=/[1-9]\d*.\d*|0.\d*[1-9]\d*/;
                                                res=res.match(pattern);
                                                if(current_elt_id){
                                                    //$("#"+current_elt_id).val(res);
                                                    if(current_elt_id=="weight_before_input"){
                                                        vm.info.weight_before=res[0];
                                                        vm.save_info("weight_before");
                                                    }else if(current_elt_id=="weight_after_input"){
                                                        vm.info.weight_after=res[0];
                                                        vm.save_info("weight_after");
                                                    }else if(current_elt_id=="weight_input"){
                                                        vm.info.weight=res[0];
                                                        vm.save_info("weight");
                                                    }
                                                }
                                            }
                                        }
                                    )
                                },200);
                            }else{
                                alert("打开端口失败!");
                            }
                        },
                        error: function(){
                            alert("打开端口失败!");
                        }
                    });
                }, 0);

            }
        } catch (err) {
            console.log(err);
        }
    }

    //退出时关闭串口
    $(document).unbind('bjui.beforeCloseDialog').on('bjui.beforeCloseDialog', function (e) {
        closeCom();
    })