51单片机用蓝牙和ds1302调时lcd1602显示程序代码

以下是使用51单片机，蓝牙模块和DS1302实时时钟芯片，控制LCD1602显示时间的程序代码：

#include <reg51.h>
#include <intrins.h>

#define uchar unsigned char
#define uint unsigned int

sbit SCLK = P3^6;   // DS1302时钟线
sbit IO   = P3^5;   // DS1302数据线
sbit RST  = P3^4;   // DS1302复位线
sbit RS   = P1^0;   // LCD1602控制线
sbit RW   = P1^1;   // LCD1602控制线
sbit E    = P1^2;   // LCD1602控制线

void delay(uint z)
{
    uint x,y;
    for(x=z;x>0;x--)
    {
        for(y=110;y>0;y--);
    }
}

void write_com(uchar com)
{
    RS = 0;
    RW = 0;
    P0 = com;
    delay(5);
    E = 1;
    delay(5);
    E = 0;
}

void write_data(uchar dat)
{
    RS = 1;
    RW = 0;
    P0 = dat;
    delay(5);
    E = 1;
    delay(5);
    E = 0;
}

void init()
{
    write_com(0x38);
    write_com(0x0c);
    write_com(0x06);
    write_com(0x01);
}

void write_string(uchar x, uchar y, uchar *s)
{
    uchar i;
    if(x<16)
    {
        x |= 0x80;
        switch(y)
        {
            case 0:i=0;break;
            case 1:i=1;break;
            case 2:i=2;break;
            case 3:i=3;break;
        }
        i |= 0x40;
        write_com(x);
        write_com(i);
        while(*s)
        {
            write_data(*s++);
        }
    }
}

void write_ds1302_byte(uchar dat)
{
    uchar i;
    for(i=0;i<8;i++)
    {
        IO = dat & 0x01;
        dat >>= 1;
        SCLK = 0;
        _nop_();
        _nop_();
        SCLK = 1;
        _nop_();
        _nop_();
    }
}

uchar read_ds1302_byte()
{
    uchar i,dat;
    for(i=0;i<8;i++)
    {
        dat >>= 1;
        if(IO)
        {
            dat |= 0x80;
        }
        SCLK = 0;
        _nop_();
        _nop_();
        SCLK = 1;
        _nop_();
        _nop_();
    }
    return dat;
}

void write_ds1302(uchar addr, uchar dat)
{
    RST = 0;
    _nop_();
    _nop_();
    RST = 1;
    _nop_();
    _nop_();
    write_ds1302_byte(addr);
    write_ds1302_byte(dat);
    RST = 0;
}

uchar read_ds1302(uchar addr)
{
    uchar dat;
    RST = 0;
    _nop_();
    _nop_();
    RST = 1;
    _nop_();
    _nop_();
    write_ds1302_byte(addr);
    dat = read_ds1302_byte();
    RST = 0;
    return dat;
}

void read_time()
{
    uchar sec,min,hr;
    sec = read_ds1302(0x81);
    min = read_ds1302(0x83);
    hr = read_ds1302(0x85);
    write_string(0,0,"Time:");
    write_string(6,0,hr/16+'0');
    write_string(7,0,hr%16+'0');
    write_string(8,0,':');
    write_string(9,0,min/16+'0');
    write_string(10,0,min%16+'0');
    write_string(11,0,':');
    write_string(12,0,sec/16+'0');
    write_string(13,0,sec%16+'0');
}

void main()
{
    uchar i;
    init();
    write_string(0,1,"Bluetooth Test");
    write_string(0,2,"Waiting...");
    while(1)
    {
        if(SBUF=='T')
        {
            SBUF = 'O';
            delay(100);
            read_time();
            delay(100);
            write_string(0,3,"Received T");
        }
    }
}

注意：需要根据自己使用的蓝牙模块进行相应的修改。同时DS1302时钟芯片需要在电路中正确接线。