——來自迪文開發(fā)者論壇

本期為大家推送迪文開發(fā)者論壇獲獎開源案例——安卓與迪文屏的無線交互應(yīng)用。工程師采用T5L智能屏，通過串口2與藍牙模塊通訊，實現(xiàn)與安卓手機APP進行數(shù)據(jù)交互。該方案支持迪文屏與安卓手機無延時數(shù)據(jù)收發(fā)、數(shù)據(jù)回顯、多設(shè)備通信、導(dǎo)出和導(dǎo)入文件，還支持ASCII碼、Char、GBK、UNICODE等多種編碼格式，更有意思的是實現(xiàn)了16*16LED點陣廣告屏的功能，讓我們一睹為快！

方案框架 方案由T5L智能屏、HC-05或HC-06藍牙模塊、安卓手機構(gòu)成。T5L智能屏通過串口2與藍牙模塊通訊，實現(xiàn)屏幕與安卓手機的數(shù)據(jù)交互。

UI素材展示

C51工程設(shè)計

（1）串口2與藍牙通訊的代碼參考如下：

#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）給安卓APP發(fā)送數(shù)據(jù)的部分代碼如下:

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數(shù)據(jù)的部分代碼如下: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點陣屏顯示的部分代碼如下: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++;

}

}

}