งานหา micro 14

Interfacing 16×2 LCD with 8051 Circuit Diagram

#include<reg51.h>
#define lcd P0

sbit rs=P2^0;
sbit e=P2^1;

void delay (int);
void cmd (char);
void display (char);
void custom (void);
void string (char *);
void init (void);

unsigned char custom_char[]= {0x00,0x04,0x0E,0x04,0x15,0x0E,0x04,0x00, 
                       0x00,0x04,0x0E,0x0E,0x0E,0x1F,0x04,0x00, 
                       0x00,0x0A,0x15,0x11,0x11,0x0A,0x04,0x00,
         0x0E,0x11,0x11,0x1F,0x1B,0x1B,0x1B,0x1F,
                       0x0E,0x11,0x10,0x1F,0x1B,0x1B,0x1B,0x1F,
         0x00,0x0E,0x15,0x1B,0x0E,0x0E,0x00,0x00,
                       };
                           
 
void delay (int d)
{
 unsigned char i;
 for(;d>0;d--)
 {
  for(i=250;i>0;i--);
  for(i=248;i>0;i--);
 }
}
void cmd (char c)
{
 lcd=c;
 rs=0;
 e=1;
 delay(5);
 e=0;
}
void display (char c)
{
 lcd=c;
 rs=1;
 e=1;
 delay(5);
 e=0;
}
void custom (void)
{
 int k;
 cmd(0x40);
 for(k=0;k<48;k++)
 display(custom_char[k]);
 cmd(0x80);
}

void string (char *p)
{
 while(*p)
 {
  display(*p++);
 }
}
void init (void)
{
 cmd(0x38);
 cmd(0x0c);
 cmd(0x01);
 cmd(0x80);
}
void main()
{
 init();
 custom();
 string("Electronics Hub ");
 cmd(0xc0);
 string("    Presents    ");
 delay(2000);
 cmd(0x01);
 cmd(0x80);
 string("  Custom Chars  ");
 cmd(0xc0);
 string("  on 16x2 LCD   ");
 delay(2000);
 cmd(0x01);
 cmd(0x80);
 string("ABCDEFGHIJKLMNOP");
 cmd(0xc0);
 string("1234567890");
 cmd(0xca);
 display(0);
 display(1);
 display(2);
 display(3);
 display(4);
 display(5);
while(1);
}