51单片机电子万年历系统的设计+PCB电路图(5)

E=0;

P0=cmd;

delay_us(5);

E=1;

E=0;

}

void write_data(uchar dat)

{

busy_wait();

RS=1;

RW=0;

E=0;

P0=dat;

delay_us(5);

E=1;

E=0;

}

void initial_lcd(void)

{

write_command(0x01); //清空led

write_command(0x10); //字符进入模式，屏幕不动，字符右移06、10,14,1c和16没区别,18不显示

write_command(0x0c); //显示器打开

write_command(0x38); //8位数据传输，双行显示，5*7

}

void lcd_show_string(uchar r,uchar c,uchar *str)

{

uchar i=0;

uchar code ddram[]={0x80,0xc0,0x94,0xd4}; //LM044L的

write_command(ddram[r] | c); //显示地址

for(i=0;str[i] && i<16;i++) //LM044L的

write_data(str[i]);

for(;i<16;i++) //不足一行用空格补齐

write_data(' ');

}

//PCF8583时钟芯片配置和初始化

char week[][4]={"SUN","MON","TUS","WEN","THU","FRI","SAT"};

uchar PCF8583_DATA[5],DateTime[7];

uchar second=8,minuter=8,hour=8,date=2,month=4,year=2017;

uchar flag=1;

/*从PCF8583内部寄存器addr处开始，读取n个字符型数存到buf缓冲区中*/

void Read_PCF8583(uchar addr,uchar *buf,uchar n)

{

uchar i;

iic_start();

send_bayte(PCF8583_ADDR_WR);

send_bayte(addr);

iic_start();

send_bayte(PCF8583_ADDR_RD);

for(i=0;i<n-1;i++)

{

buf[i]=read_bayte();

send_ack(0);

}论文网

buf[n-1]=read_bayte();

send_ack(1);

iic_stop();

}

/************** 10进制转BCD ***************************/

unsigned char bcd_10_dec(unsigned char bat)

{

unsigned char temp1, temp2, temp3, temp4, tol;

temp3 = bat / 10; //分离十位

temp4 = bat % 10; //分离个位

temp1 = (temp3 << 4) & 0xf0; //移到高4位

temp2 = (temp4 & 0x0f);

tol = temp1 | temp2;

return tol;

}

void Write_PCF8583(uchar addr,uchar val)

{

iic_start();

send_bayte(PCF8583_ADDR_WR);

send_bayte(addr);

send_bayte(val);

iic_stop();

}

/*void GetDateTime(void)将读取到的数据处理后发到DateTime[]*/

void GetDateTime()

{

// uchar send1,send2,send3,send4,send5,send6;

// send1=bcd_10_dec(second);

// send2=bcd_10_dec(minuter);

// send3=bcd_10_dec(hour);

// send4=bcd_10_dec(date);

// send5=bcd_10_dec(month);

// 51单片机电子万年历系统的设计+PCB电路图(5):http://www.youerw.com/zidonghua/lunwen_202275.html