lcd.h

单片机C51控制

//lcd command
#define TwoLine_8bit  56  //0x38
#define CLEAR          1
#define CURSOR_HOME    2
#define CURSOR_LEFT   4
#define CURSOR_RIGHT   6
#define CURSOR_OFF    12
#define CURSOR_ON     14
#define CURSOR_BLINK  15
#define GOTO_LINE_2   192
#define GOTO_LINE_1   128
//LCD CONTROL LINES
#define ENABLE    1
#define DISABLE   0
#define READ      1
#define WRITE     0
#define COMMAND   0
#define DATA      1
#define rs        P2_5
#define enable    P2_7
#define rw        P2_6
sbit P2_5 = P2^5;
sbit P2_6 = P2^6;
sbit P2_7 = P2^7;

void delay100us(char);
void write_LCD_command(unsigned);
void init_LCD(void);
void clear_LCD(void);
void display_LCD_string(char*);
void gotoxy(unsigned,unsigned);
void display_LCD_number(char);

char code int2charLCD[]="0123456789";
void write_LCD_command(unsigned command)
{
rw=WRITE;
rs=COMMAND;
enable=ENABLE;
P0=command;
delay100us(20);
enable=DISABLE;
rw=1;
}

void write_LCD_data(unsigned LCDdata)
{
rw=WRITE;
rs=DATA;
enable=ENABLE;
P0=LCDdata;
delay100us(20);
enable=DISABLE;
rw=1;
}

void init_LCD(void)
{
write_LCD_command(TwoLine_8bit);//0xx38
write_LCD_command(CURSOR_OFF);//0x0c
write_LCD_command(CURSOR_RIGHT);//0X06
}

void clear_LCD()
{
write_LCD_command(CLEAR);
write_LCD_command(CURSOR_HOME);
}

void display_LCD_string(char* p)
{
while(*p)
{
write_LCD_data(*p);
p++;
}
}

void display_LCD_number(char number)
{
unsigned char x,y;
x=number/10;
y=number-10*x;
write_LCD_data(int2charLCD[x]);
write_LCD_data(int2charLCD[y]);
}

void gotoxy(unsigned x,unsigned y)
{
if(x==1)
write_LCD_command(GOTO_LINE_1+y);
else 
write_LCD_command(GOTO_LINE_2+y);
}

void delay100us( char Delay)
{
 char i;
for(;Delay>0;Delay--)
{ 
for(i=0;i<12;i++)
{;}
}
}