【开源获奖案例】基于T5L的smtp邮件发送器

            ——来自迪文开发者论坛

本期为您推送一个非常实用的迪文开发者论坛获奖开源案例——基于T5L的smtp邮件发送器，工程师采用T5L，通过WiFi模块访问smtp服务器，实现了发送邮件给管理员的功能，操作时在屏幕上输入收件人邮箱、邮件标题、邮件内容等信息即可。值得注意的是，邮件内容还支持纯文本、组态控件、设置文本颜色等编辑方式。

【演示视频】

完整开发资料含迪文屏DGUS工程资料与代码，可前往迪文开发者论坛获取：http://inforum.dwin.com.cn:20080/forum.php?mod=viewthread&tid=8932

1.方案架构

T5L智能屏通过串口5控制WiFi模块与smtp服务器交互，实现邮件发送功能。

2.界面开发

DGUS软件通过图层叠加来完成显示和触控功能开发，用户只需要把准备好的图片素材加载到DGUS软件，设置好显示和触控功能即可。

3.C51软件设计

T5L智能屏串口5与WiFi模块通讯，完成与smtp服务器交互。完整代码请参考源码工程，部分主要代码如下：

void uart5_init(u32 baud)

{

    SCON3T = 0x80;

    SCON3R = 0x80;

    baud = (u32)((double)(FOSC/8.0)/baud);

    BODE3_DIV_H = (baud>>8)&0xff;

    BODE3_DIV_L = baud&0xff;

    ES3R = 0;

    ES3T = 0;

}

void u5_send_byte(u8 byte)

{

    SBUF3_TX = byte;

    while(!(SCON3T&0x01));

    SCON3T &= 0xfe;

}

void u5_send_bytes(u8 *bytes,u16 len)

{

    u16 i;

    for(i=0;i<len;i++)

    {

        SBUF3_TX = bytes;

        while(!(SCON3T&0x01));

        SCON3T &= 0xfe;

    }

}

void get_input(u8 * val,u8 len)

{

    u8 i;

    for(i=0;i<len;i++)

    {

        if(val==0xff)

        {

            val = 0x00;

            val[i+1] = 0x00;

            return;

        }

    }

}

u8 esp8266_send_cmd(u8 *cmd,u8 *ack,u16 waittime,u8 clearBuffer)

{

    u8 res=0;

    rx_sta=0;

    if(ack&&waittime&&cmd)        

    {

        while(--waittime)        

        {

            sys_delay_ms(10);

            if(rx_sta&0X8000)

            {

                if(esp8266_check_respond(ack))

                break;

            }

        }

        if(waittime==0)res=1;

        if(clearBuffer==1)rx_sta=0;

     }

    return res;

}

typedef struct{

    u8 cmd;

    u8 email[20];

    u8 name[20];

    u8 title[20];

    u8 msg[60];

}EMAIL_INFO;

EMAIL_INFO email_info;

u8 respond[80];

u8 wifi_name[30];

u8 wifi_passwd[30];

u8 server[30];

u8 port[30];

u8 username[30];

u8 auth_code[30];

u8 rx_sta;

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

if(btn_val)

{

    if(btn_val==1)

    {

        sys_read_vp(0x3000,email_info.name,10);

        sys_read_vp(0x3020,email_info.email,10);

        sys_read_vp(0x3040,email_info.title,10);

        sys_read_vp(0x3060,email_info.msg,30);

        get_input(email_info.name,20);

        get_input(email_info.email,20);

        get_input(email_info.title,20);

        get_input(email_info.msg,60);

        send_packet((u8*)&email_info,sizeof(EMAIL_INFO));

        if(rx_sta)

            send_mail(email_info.email,email_info.title,email_info.msg);

    }else if(btn_val==2)

    {

        sys_read_vp(0x3100,wifi_name,15);

        sys_read_vp(0x3120,wifi_passwd,15);

        get_input(wifi_name,30);

        get_input(wifi_passwd,30);

    }else if(btn_val==3)

    {

        sys_read_vp(0x3200,server,15);

        sys_read_vp(0x3220,port,15);

        sys_read_vp(0x3240,username,15);

        sys_read_vp(0x3260,auth_code,15);        

        get_input(server,30);

        get_input(port,30);

        get_input(username,30);

        get_input(auth_code,30);                                

    }

    btn_val = 0;

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

}

sys_read_vp(0x2050,(u8*)&btn_val2,1);

if(btn_val2!=old_val)

{

    if(btn_val2==1)

        sys_write_vp(0x3060,"This is a email from T5L!\0\0",30);

    else if(btn_val2==2)

        sys_write_vp(0x3060,"<button>Click</button><br><br><input value='good'>\0\0",30);

    else if(btn_val2==3)

        sys_write_vp(0x3060,"<h3>Bold</h3><h1 style='color:red;'>Red</h1>\0\0",30);

    old_val = btn_val2;

}