Hey I am trying to print characters on an LCD using the 8051. I am programming the 8051 in C. So far I have managed to print to lines to the LCD which is a 16*2 LCD. My problem is when I want to clear the LCD and print 2 new lines to it. what happens is that the 2 new lines get mixedup with the old 2 lines of words.
Here is my code so far.




#include<aduc812.h>
#include<stdio.h>

sbit LCD_RS = 0x0B1; //Register Select line = port 3.1
sbit LCD_WR = 0x0B3; //Read/Write line = port 3.3
sbit LCD_EN = 0x0B5; //Enable line = port 3.5
sfr LCD_DATA = 0x080; //Data bus = port 0
sbit busy = 0x087; //busy bit = db7
sfr KEY = 0x0A0; //INPUT PORT 2

void sendcmd(unsigned cmd);
void chkbusy(void); //Checks the busy status of the LCD controller
void sendchar(unsigned); //Function which sends text to the LCD display

void main(void)
{
data unsigned char buf[16];//Databuffer for text to be displayed
data int i=0;

for(;;){
sendcmd(0x038); // Initialising the display
sendcmd(0x06); //Function set
sendcmd(0x02); //Entry set
sendcmd(0x0C); //Home
//Display on, cursor, etc

sprintf(buf, "Jeffrey ");//Move text into the buffer
i=0;
while (buf[i]!='')//Sends text out to LCD display, one charachter at a time
{
sendchar(buf[i]);
i++;
}

sendcmd(0xC0);//the start of the 2nd line

sprintf(buf, "Ryan "); //Move text into the buffer

i=0;
while (buf[i]!='')
//Sends text out to LCD display, one charachter at a time

{
sendchar(buf[i]);
i++;
}

sendcmd(0x01); //Clear LCD?????

sprintf(buf, "5 Inglewood");
i=0;
while (buf[i]!='')
{
sendchar(buf[i]);
i++;
}

sendcmd(0xC0);
sprintf(buf, "Thomondgate "); i=0;
while (buf[i]!='') {
sendchar(buf[i]);
i++;
}
}
}


/* Function to check the busy status of the LCD controller */

void chkbusy(void)
{
data int i;
data unsigned temp;
LCD_DATA = 0x0FF; // configure as ip's
LCD_RS = 0x00; // CLEARS RS LINE
LCD_WR = 0x01; // SETS R/W LINE
i++;
i++;
i++;
i++;
do{
LCD_EN = 1; // CLOCKS E HIGH
i++;
i++;
i++;
i++;
temp = LCD_DATA;
i++;
i++;
i++;
LCD_EN = 0; // CLOCKS E LOW
i++;
i++;
} while (busy == 0);
}

/* Function which sends commands out to the LCD controller */

void sendcmd(unsigned cmd)
{
data int i;
chkbusy(); // CHECKS BUSY FLAG
LCD_DATA = cmd; // SENDS TO PORT 0
LCD_WR = 0; //CLEARS R/W LINE
LCD_RS = 0; // CLEARS RS LINE
i++;
LCD_EN = 1; // CLOCKS E HIGH
i++;
i++;
i++;
i++;
i++;
LCD_EN = 0; // CLOCKS E LOW
}

void sendchar(unsigned ch)
{
data int i;
chkbusy();
LCD_DATA = ch; // SENDS TO PORT 0
LCD_WR = 0; // CLEARS R/W LINE
LCD_RS = 1; // SETS RS LINE HIGH FOR DATA
i++;
LCD_EN = 1;// CLOCKS E HIGH
i++;
i++;
i++;
i++;
i++;
LCD_EN = 0; // CLOCKS E LOW
}