/* This function scrolls only the bottom row of the LCD display once
to the left. If it is already at the end of the message, it resets
the display to the home position */
void lcd_scroll (void)
{ int i=0;
char temp;
p5_3 = 0; //disable sensors
if(bottom_length - 9 == lcd_pos) // if end of scrolling line
{ for(i = 0; 8 > i; i++) // copy top line to beginning
{ temp = lcd_char_read(lcd_pos + i);
lcd_command_write(0x80 + i);
lcd_char_write(temp);
}
lcd_command_write(0x02); // change scroll to beginning
lcd_pos = 0; // reset position
}
else if (9 < bottom_length) // if not the end, scroll once to the left
{ for(i = 8; 0 < i; i--) // copy the top line one place ahead
{ temp = lcd_char_read(lcd_pos + i - 1);
lcd_command_write(0x80 + lcd_pos + i);
lcd_char_write(temp);
}
lcd_command_write (0x18); // now scroll
lcd_pos++;
}
p5_3 = 1; //enable sensors
prc2 = 1;
pd0_0 = 0;
prc2 = 1;
pd0_1 = 0;
prc2 = 1;
pd0_2 = 0;
prc2 = 1;
pd0_3 = 0;
}
/* This function takes the char array 'message' and displays it on the
bottom line of the LCD */
void lcd_display_bottom (char message[])
{
int i = 0;
char temp;
p5_3 = 0; //disable sensors
lcd_command_write(0xA8); // set position to bottom line
while(0 != message[i]) // send the charactors
lcd_char_write(message[i++]);
bottom_length = i + 1; // counter for the length of the bottom line
for (i = 0; 9 > bottom_length + i; i++)
lcd_char_write(' '); // make rest of line blank;
for(i = 0; 8 > i; i++) // copy top line to beginning
{ temp = lcd_char_read(lcd_pos + i);
lcd_command_write(0x80 + i);
lcd_char_write(temp);
}
lcd_pos = 0;
lcd_command_write(0x02); // reset scrolling to home position
p5_3 = 1; //enable sensors
prc2 = 1;
pd0_0 = 0;
prc2 = 1;
pd0_1 = 0;
prc2 = 1;
pd0_2 = 0;
prc2 = 1;
pd0_3 = 0;
}
void init_lcd( void )
{
set_lcd_port_output();
delay(100*100);
lcd_command_write(0x28); /* (Function Set) 4-bit interface, two line, 5X8 dots. */
lcd_clear() ; /* LCD clear */
lcd_command_write(0x02); /* cursor home */
lcd_command_write(0x06); /* (Entry Mode) Increment, Display Shift off */
lcd_command_write(0x0C) ; /* display on, Cursor & Blink off */
lcd_gotoxy(0, 0);
lcd_clear();
lcd_putstring(0," JRM Technologies");
lcd_putstring(1," SAIRAM JAIRAM ");
}
/**
********************************************************************************************
Function Name : init_lcd()
Description :
Input :
Output : Void
Note :
********************************************************************************************
*/
void init_lcd( void )
{
set_lcd_port_output();
delay(100*100);
delay(100*100);
lcd_command_write(0x28); /* 4-bit interface, two line, 5X7 dots. */
lcd_clear() ; /* LCD clear */
lcd_command_write(0x02); /* cursor home */
lcd_command_write(0x06); /* cursor move direction */
lcd_command_write(0x0C) ; /* display on */
lcd_gotoxy(0, 0);
lcd_clear();
lcd_putstring(0," N G X ");
lcd_putstring(1," TECHNOLOGIES ");
}
int lcd_gotoxy( unsigned int x, unsigned int y)
{
int retval = 0;
if( (x > 1) && (y > 15) )
{
retval = -1;
} else {
if( x == 0 )
{
lcd_command_write( 0x80 + y ); /* command - position cursor at 0x00 (0x80 + 0x00 ) */
} else if( x==1 ){
lcd_command_write( 0xC0 + y ); /* command - position cursor at 0x40 (0x80 + 0x00 ) */
}
}
return retval;
}
void lcd_gotoxy( unsigned int x, unsigned int y)
{
if( x == 0 )
{
lcd_command_write( 0x80 + y ); /* command - position cursor at 0x00 (0x80 + 0x00 ) */
}
else if( x==1 )
{
lcd_command_write( 0xC0 + y ); /* command - position cursor at 0x40 (0x80 + 0x00 ) */
}
else if( x==2 )
{
lcd_command_write( 0x80 + y + 20 ); /* command - position cursor at 0x40 (0x80 + 0x00 ) */
}
else if( x==3 )
{
lcd_command_write( 0xC0 + y + 20); /* command - position cursor at 0x40 (0x80 + 0x00 ) */
}
}
/* This function clears the LCD display and resets the position to home */
void lcd_clear(void)
{ p5_3 = 0; //disable sensors
lcd_command_write(0x01); // clear display and go to home position
lcd_pos = 0; // reset position
p5_3 = 1; //enable sensors
prc2 = 1;
pd0_0 = 0;
prc2 = 1;
pd0_1 = 0;
prc2 = 1;
pd0_2 = 0;
prc2 = 1;
pd0_3 = 0;
}
/* This function takes the char array 'message' and displays it on the
top line of the LCD */
void lcd_display_top (char message[])
{
int i = 0;
p5_3 = 0; //disable sensors
lcd_command_write(0x80 + lcd_pos); // set position to top line
while(0 != message[i]) // send the charactors
lcd_char_write(message[i++]);
top_length = i + 1; // counter for the length of the message
for (i = 0; 9 > top_length + i; i++)
lcd_char_write(' '); // make rest of line blank
p5_3 = 1; //enable sensors
prc2 = 1;
pd0_0 = 0;
prc2 = 1;
pd0_1 = 0;
prc2 = 1;
pd0_2 = 0;
prc2 = 1;
pd0_3 = 0;
}
void lcd_clear( void)
{
lcd_command_write( 0x01 );
}
void lcd_clear( void)
{
lcd_command_write( 0x01 );
delayMs(1,2);
}
void setLCD( void )
{
delayMs(1,50);
lcd_command_write(0b00101001); // function set - 4-bit interface
delayMs(1,2);
lcd_command_write(0b00001000); // display off
delayMs(1,2);
lcd_clear();
lcd_command_write(0b00000110); // cursor move direction
delayMs(1,2);
// setup custom characters
lcd_command_write(0b01000000); // move to first CGRAM location
delayMs(1,2);
lcd_data_write(0b00000000); delayMs(1,2); // 0x00
lcd_data_write(0b00000011); delayMs(1,2);
lcd_data_write(0b00000100); delayMs(1,2);
lcd_data_write(0b00001000); delayMs(1,2);
lcd_data_write(0b00010000); delayMs(1,2);
lcd_data_write(0b00010000); delayMs(1,2);
lcd_data_write(0b00010000); delayMs(1,2);
lcd_data_write(0b00010000); delayMs(1,2);
lcd_data_write(0b00010000); delayMs(1,2); // 0x01
lcd_data_write(0b00010000); delayMs(1,2);
lcd_data_write(0b00010000); delayMs(1,2);
lcd_data_write(0b00010000); delayMs(1,2);
lcd_data_write(0b00010000); delayMs(1,2);
lcd_data_write(0b00001000); delayMs(1,2);
lcd_data_write(0b00000111); delayMs(1,2);
lcd_data_write(0b00000000); delayMs(1,2);
lcd_data_write(0b00011111); delayMs(1,2); // 0x02
lcd_data_write(0b00000000); delayMs(1,2);
lcd_data_write(0b00000000); delayMs(1,2);
lcd_data_write(0b00000000); delayMs(1,2);
lcd_data_write(0b00000000); delayMs(1,2);
lcd_data_write(0b00000000); delayMs(1,2);
lcd_data_write(0b00000000); delayMs(1,2);
lcd_data_write(0b00001111); delayMs(1,2);
lcd_data_write(0b00010010); delayMs(1,2); // 0x03
lcd_data_write(0b00001001); delayMs(1,2);
lcd_data_write(0b00001001); delayMs(1,2);
lcd_data_write(0b00001001); delayMs(1,2);
lcd_data_write(0b00001001); delayMs(1,2);
lcd_data_write(0b00010010); delayMs(1,2);
lcd_data_write(0b00001100); delayMs(1,2);
lcd_data_write(0b00000000); delayMs(1,2);
lcd_data_write(0b00011111); delayMs(1,2); // 0x04
lcd_data_write(0b00000000); delayMs(1,2);
lcd_data_write(0b00000000); delayMs(1,2);
lcd_data_write(0b00000000); delayMs(1,2);
lcd_data_write(0b00000000); delayMs(1,2);
lcd_data_write(0b00000000); delayMs(1,2);
lcd_data_write(0b00000000); delayMs(1,2);
lcd_data_write(0b00011111); delayMs(1,2);
lcd_data_write(0b00011100); delayMs(1,2); // 0x05
lcd_data_write(0b00000010); delayMs(1,2);
lcd_data_write(0b00000001); delayMs(1,2);
lcd_data_write(0b00000111); delayMs(1,2);
lcd_data_write(0b00000001); delayMs(1,2);
lcd_data_write(0b00000001); delayMs(1,2);
lcd_data_write(0b00000010); delayMs(1,2);
lcd_data_write(0b00011100); delayMs(1,2);
lcd_command_write(0b00000010); // cursor home
delayMs(1,2);
lcd_command_write(0b00001100); // display on
delayMs(1,2);
lcd_gotoxy(0, 0);
delayMs(1,2);
lcd_clear();
}
