安卓与迪文屏的无线交互应用

——来自迪文开发者论坛
 

 

本期为大家推送迪文开发者论坛获奖开源案例——安卓与迪文屏的无线交互应用。工程师采用T5L智能屏，通过串口2与蓝牙模块通讯，实现与安卓手机APP进行数据交互。该方案支持迪文屏与安卓手机无延时数据收发、数据回显、多设备通信、导出和导入文件，还支持ASCII码、Char、GBK、UNICODE等多种编码格式，更有意思的是实现了16*16LED点阵广告屏的功能，让我们一睹为快！

  方案框架    方案由T5L智能屏、HC-05或HC-06蓝牙模块、安卓手机构成。T5L智能屏通过串口2与蓝牙模块通讯，实现屏幕与安卓手机的数据交互。

  UI素材展示   

   C51工程设计     

（1）串口2与蓝牙通讯的代码参考如下：

#if(1)

#define MODBUS_RECV_TIMEOUT 50

static bit is_modbus_recv_complete = 0;

static u8 modbus_recv_buff[1024];

static u16 modbus_recv_len = 0;

static u8 modbus_recv_timeout = 0;

 

void modbus_recv_byte(u8 byte)

{

    if(is_modbus_recv_complete)

        return;

    if(modbus_recv_len

        modbus_recv_buff[modbus_recv_len++] = byte;

        modbus_recv_timeout = MODBUS_RECV_TIMEOUT;

}

void modbus_check_recv_timeout()

{

    if(modbus_recv_timeout)

    {

        modbus_recv_timeout--;

        if(modbus_recv_timeout==0)

        {

            is_modbus_recv_complete = 1;

        }

    }

}

void uart2_isr() interrupt 4

{

    if(RI0)

    {

        RI0 = 0;

        modbus_recv_byte(SBUF0);

    }

}

#endif

void uart2_init(u32 baud)

{

    MUX_SEL |= 0x40;

    P0MDOUT &= 0xCF;

    P0MDOUT |= 0x10;

    ADCON = 0x80;

    SCON0 = 0x50;

    PCON &= 0x7F;

    baud = 1024-(u16)(3225600.0f/baud);

    SREL0H = (baud>>8)&0xff;

    SREL0L = baud&0xff;

    #if(1)

        ES0 = 1;

        EA = 1;

    #else

        ES0 = 0;

    #endif

}

void uart2_send_byte(u8 byte)

{

    ES0 = 0;

    SBUF0 = byte;

    while(!TI0);

    TI0 = 0;

    #if(1)

        ES0 = 1;

    #endif

}

void uart2_send_bytes(u8 *bytes,u16 len)

{

    u16 i;

    ES0 = 0;

    for(i=0;i

    {

        SBUF0 = bytes;

        while(!TI0);

        TI0 = 0;

    }

     #if(1)

        ES0 = 1;

    #endif

}

char putchar(char c)

{

    uart2_send_byte(c);

    return c;

}

（2）给安卓APP发送数据的部分代码如下:
 

u8 buff[200];

 

void get_str(u8 *val,u8 len)

 

{

 

    u8 i;     for(i=0;i

 

    {

 

        if(val==0xff)

 

        {

 

            val = 0x00;

 

            val[i+1] = 0x00;

 

            return;

 

        }

 

    }

 

}

 

void start_win_btn_click_handler(u16 btn_val)

 

{

 

    if(btn_val==0x01)

 

    {

 

        sys_read_vp(0x2100, buff, 50);

 

        get_str(buff,100);

 

        uart2_send_bytes(buff, strlen(buff));

 

    }

 

}

（3）接收安卓APP数据的部分代码如下:void uart2_handler()

 

{

 

    if(is_modbus_recv_complete)

 

    {

 

        if(modbus_recv_len==33)

 

        {

 

            disp_16x16_char(modbus_recv_buff+1);

 

        }else

 

        {

 

            modbus_recv_buff[modbus_recv_len++] = 0;

 

            modbus_recv_buff[modbus_recv_len++] = 0;

 

            sys_write_vp(0x2000, modbus_recv_buff, modbus_recv_len/2+2);

 

        }

 

        modbus_recv_len = 0;

 

        is_modbus_recv_complete = 0;

 

    }

 

}（4）16*16点阵屏显示的部分代码如下:void disp_16x16_char(u8 *buff)

 

{

 

    u8 i,j;

 

    u16 val;

 

    u16 pos = 0;     for(i=0;i<32;i++)

 

    {

 

        j = 8;

 

        while(j--)

 

        {

 

            val = (buff>>j)&0x01;

 

            sys_write_vp(0x3000+pos, (u8*)&val, 1);

 

            pos++;

 

        }

 

    }

 

}