/*hi shylaja ref the code */
/*program for lcd interfacing programed by balaji any bug report [email protected]*/
#include <reg51.h>
sfr ldata = 0x90; //P1=LCD data pins
sbit rs = P2^0;
sbit rw = P2^1;
sbit en = P2^2;
sbit busy = P1^7;
void lcdcmd(unsigned char value);
void MSDelay(unsigned int itime);
void lcddata(unsigned char value);
void lcdready();
void lcdstring(char *string);
void main()
{
lcdcmd(0x38);
lcdcmd(0x0E);
lcdcmd(0x01);
lcdcmd(0x06);
lcdcmd(0x80); //line 1, position 6
while(1)
{
lcdcmd(0x80);
lcdstring(” welcmoe”);
}
}
void lcdcmd(unsigned char value)
{
lcdready(); //check the LCD busy flag
ldata = value; //put the value on the pins
rs = 0;
rw = 0;
en = 1; //strobe the enable pin
MSDelay(1);
en = 0;
return;
}
void lcddata(unsigned char value)
{
lcdready(); //check the LCD busy flag
ldata = value; //put the value on the pins
rs = 1;
rw = 0;
en = 1; //strobe the enable pin
MSDelay(1);
en = 0;
return;
}
void lcdready()
{
busy = 1; //make the busy pin at input
rs = 0;
rw = 1;
while(busy==1)
{ //wait here for busy flag
en = 0; //strobe the enable pin
MSDelay(1);
en = 1;
}
}
void MSDelay(unsigned int itime)
{
unsigned int i, j;
for(i=0;i<itime;i++)
for(j=0;j<1275;j++);
}
void lcdstring(char *string)
{
while(*string++)
lcddata(*string);
}