【开源获奖案例】浏览器网页与T5L迪文屏串口深度扩展(Node-RED技术)

    ——来自迪文开发者论坛

本期为大家推送一个很有创意的迪文开发者论坛获奖开源案例——浏览器网页与T5L迪文屏串口深度扩展(Node-RED技术),工程师使用T5L智能屏,通过Node-RED技术,只需要一个串口,就可以接入互联网,实现迪文屏与浏览器网页的数据交互。该方案实现了智能屏与网页端的数据收发、图表交互、基本信息显示等功能。


【演示视频】

完整开发资料含迪文屏DGUS工程资料与C51代码,获取方式:

1. 前往迪文开发者论坛获取:http://inforum.dwin.com.cn:20080/forum.php?mod=viewthread&tid=9402

2.微信公众号中回复“浏览器与迪文屏”获取。


【Node-RED网页端运行效果展示】

(1)使用Node-RED技术,以浏览器作为交互入口,使浏览器与屏幕通过串口交互,实现相应功能展示。

Tab页面

数据收发Tab页面

Tab页面

图标交互Tab页面

Tab页面效果

基本信息Tab页面效果


(2)Node-RED网页端主要参考代码如下:

  {

        "id": "fbb314a16ea00889",

        "type": "serial in",

        "z": "09e0777eaff7fdea",

        "g": "c1661722c7db00f9",

        "name": "串口接受数据",

        "serial": "83fb45b5f4b51d61",

        "x": 390,

        "y": 140,

        "wires": [

            [

                "685a2fb2c2dc8fba"

            ]

        ]

    },

    {

        "id": "1ba3c6e812e03e27",

        "type": "serial out",

        "z": "09e0777eaff7fdea",

        "g": "c1661722c7db00f9",

        "name": "串口发送",

        "serial": "83fb45b5f4b51d61",

        "x": 860,

        "y": 260,

        "wires": []

    },

    {

        "id": "5fb7f1d3d7425133",

        "type": "status",

        "z": "09e0777eaff7fdea",

        "g": "c1661722c7db00f9",

        "name": "监听串口状态",

        "scope": [

            "fbb314a16ea00889"

        ],

        "x": 390,

        "y": 200,

        "wires": [

            [

                "3f18d1fdea398d35"

            ]

        ]

    },

    {

        "id": "3f18d1fdea398d35",

        "type": "function",

        "z": "09e0777eaff7fdea",

        "g": "c1661722c7db00f9",

        "name": "提取串口状态",

        "func": "let sta = msg.status.text;\nlet color = 'red';\nif (sta.indexOf('not-connected') >= 0) \n    sta = '未连接';\nelse if (sta.indexOf('connected') >= 0)\n{\n    sta = '连接成功';\n    color = 'green';\n}else\n    sta = '出现错误';\nmsg['payload'] = sta;\nmsg['color'] = color;\n\nreturn msg;",

        "outputs": 1,

        "timeout": 0,

        "noerr": 0,

        "initialize": "",

        "finalize": "",

        "libs": [],

        "x": 620,

        "y": 200,

        "wires": [

            [

                "2ec78ff0b0b9a56f"

            ]

        ]

    },

    {

        "id": "2ec78ff0b0b9a56f",

        "type": "ui_template",

        "z": "09e0777eaff7fdea",

        "g": "c1661722c7db00f9",

        "group": "4e4db779a7b91019",

        "name": "显示串口状态",

        "order": 1,

        "width": 0,

        "height": 0,

        "format": "<div style=\"font-size:19px;color:#444;margin:10px;\">\n    串口状态:<span style=\"margin-left:5px


【DGUS界面设计】

DGUS界面设计


【C51工程设计】

方案采用T5L智能屏串口2与Node-RED网页通信,部分参考代码如下:

#include "sys.h"

#include "uart2.h"

#include <string.h>

#include <stdio.h>

u8 buff[200];

void main(void)

{

    u16num;

    u16val;

    u16old;

    u8i;

    sys_init();

    uart2_init(115200);

    old= 0;

    while(1)

    {

        if(is_recv_complete)

        {

            uart2_buf[recv_len++]= 0;

            uart2_buf[recv_len++]= 0;

            if(strstr((char*)uart2_buf,"cmd"))

            {

                num= uart2_buf[3]-'0';

                if(num<3)

                {

                    for(i=0;i<3;i++)

                    {

                        val= (num==i);

                        sys_write_vp(0x2300+i,(u8*)&val, 1);

                    }

                }elseif(num<5)

                {

                    val= (num==3);

                    sys_write_vp(0x2200,(u8*)&val, 1);

                }

            }else

            {

                sys_write_vp(0x2000,uart2_buf, recv_len/2+2);

            }

            recv_len= 0;

            is_recv_complete= 0;

        }

         sys_read_vp(0x1000,(u8*)&val, 1);

        if(val==1)

        {

            sys_read_vp(0x2100,buff, 50);

            for(i=0;i<100;i++)

            {

                if(buff==0xff)

                {

                    buff= 0x00;

                    buff[i+1]= 0x00;

                    break;

                }

            }

            u2_send_bytes(buff,strlen(buff));

            val= 0;

            sys_write_vp(0x1000,(u8*)&val, 1);

        }

        sys_read_vp(0x2400,(u8*)&val, 1);

        if(val!=old)

        {

            sprintf(buff,"%d", val);

            u2_send_bytes(buff,strlen(buff));

            old= val;

        }

    }

}