——來自迪文開發者論壇

本期為您推送一個非常實用的迪文開發者論壇獲獎開源案例——基于T5L的smtp郵件發送器。工程師采用T5L智能屏，通過WiFi模塊訪問smtp服務器，實現了發送郵件給管理員的功能，操作時在屏幕上輸入收件人郵箱、郵件標題、郵件內容等信息即可。值得注意的是，郵件內容還支持純文本、組態控件、設置文本顏色等編輯方式。

方案簡介

方案架構

T5L智能屏通過串口5控制WiFi模塊與smtp服務器交互，實現郵件發送功能。

界面開發

DGUS軟件通過圖層疊加來完成顯示和觸控功能開發，用戶只需要把準備好的圖片素材加載到DGUS軟件，設置好顯示和觸控功能即可。

C51軟件設計

T5L智能屏串口5與WiFi模塊通訊，完成與smtp服務器交互。完整代碼請參考源碼工程，部分主要代碼如下：

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

{

SBUF3_TX = bytes;

while(!(SCON3T&0x01));

SCON3T &= 0xfe;

}

}

void get_input(u8 * val,u8 len)

{

u8 i;

for(i=0;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,"Click

value='good'>\0\0",30);

else if(btn_val2==3)

sys_write_vp(0x3060,"

Bold

Red

\0\0",30);

old_val = btn_val2;}