CCS :: View topic - LCD 16*4 library

FAQ

Forum Help

Official CCS Support

Profile Log in to check your private messages Log in

CCS does not monitor this forum on a regular basis.

Please do not post bug reports on this forum. Send them to CCS Technical Support

LCD 16*4 library

CCS Forum Index -> General CCS C Discussion

View previous topic :: View next topic

Author

Message

didou1987

Joined: 09 Apr 2008
Posts: 3

LCD 16*4 library
Posted: Sun May 11, 2008 11:16 am

hi to all, please i need help about the library of 16*4 lcd driver and how can i cross a text thank's for all _________________ hi to all

PCM programmer

Joined: 06 Sep 2003
Posts: 21708

Posted: Sun May 11, 2008 11:45 pm

Quote:

I need help about the library of 16*4 lcd driver.

Post the manufacturer and part number of your LCD.

Quote:

how can i cross a text

Explain the meaning of "cross a text".

Guest

Posted: Tue May 13, 2008 3:39 am

[quote]

Quote:

I need help about the library of 16*4 lcd driver.

Post the manufacturer and part number of your LCD.

SOLOMON LM1112SYL

and cross text meaning rotation word

PCM programmer

Joined: 06 Sep 2003
Posts: 21708


Posted: Tue May 13, 2008 11:32 am

Post a link to the data sheet for that LCD.

filjoa

Joined: 04 May 2008
Posts: 260

Posted: Wed May 14, 2008 8:21 am

Hi

when I try use LCD4x20 I have some problems with driver but I edit LCD.C driver and now stay all fine...

try use this driver:

Quote:

///////////////////////////////////////////////////////////////////////////
//// LCD4x20.C ////
//// Driver for common LCD modules ////
//// ////
//// lcd_init() Must be called before any other function. ////
//// ////
//// lcd_putc(c) Will display c on the next position of the LCD. ////
//// The following have special meaning: ////
//// \f Clear display ////
//// \n Go to start of second line ////
//// \b Move back one position ////
//// ////
//// lcd_gotoxy(x,y) Set write position on LCD (upper left is 1,1) ////
//// ////
//// lcd_getc(x,y) Returns character at position x,y on LCD ////
//// ////
///////////////////////////////////////////////////////////////////////////
//// (C) Copyright 1996,2003 Custom Computer Services ////
//// This source code may only be used by licensed users of the CCS C ////
//// compiler. This source code may only be distributed to other ////
//// licensed users of the CCS C compiler. No other use, reproduction ////
//// or distribution is permitted without written permission. ////
//// Derivative programs created using this software in object code ////
//// form are not restricted in any way. ////
///////////////////////////////////////////////////////////////////////////

// As defined in the following structure the pin connection is as follows:
// D0 enable
// D1 rs
// D2 rw
// D4 D4
// D5 D5
// D6 D6
// D7 D7
//
// LCD pins D0-D3 are not used and PIC D3 is not used.

// Un-comment the following define to use port B
#define use_portb_lcd TRUE

struct lcd_pin_map { // This structure is overlayed
BOOLEAN enable; // on to an I/O port to gain
BOOLEAN rs; // access to the LCD pins.
BOOLEAN rw; // The bits are allocated from
BOOLEAN unused; // low order up. ENABLE will
int data : 4; // be pin B0.
} lcd;

#if defined use_portb_lcd
//#locate lcd = getenv("sfr:PORTB") // This puts the entire structure over the port
#ifdef __pch__
#locate lcd = 0xf81
#else
#locate lcd = 6
#endif
#define set_tris_lcd(x) set_tris_b(x)
#else
//#locate lcd = getenv("sfr:PORTD") // This puts the entire structure over the port
#ifdef __pch__
#locate lcd = 0xf83
#else
#locate lcd = 8
#endif
#define set_tris_lcd(x) set_tris_d(x)
#endif

#define lcd_type 2 // 0=5x7, 1=5x10, 2=2 lines
#define lcd_line_two 0x40 // LCD RAM address for the second line

BYTE const LCD_INIT_STRING[4] = {0x20 | (lcd_type << 2), 0xc, 1, 6};
// These bytes need to be sent to the LCD
// to start it up.

// The following are used for setting
// the I/O port direction register.

struct lcd_pin_map const LCD_WRITE = {0,0,0,0,0}; // For write mode all pins are out
struct lcd_pin_map const LCD_READ = {0,0,0,0,15}; // For read mode data pins are in

BYTE lcd_read_byte() {
BYTE low,high;
set_tris_lcd(LCD_READ);
lcd.rw = 1;
delay_cycles(1);
lcd.enable = 1;
delay_cycles(1);
high = lcd.data;
lcd.enable = 0;
delay_cycles(1);
lcd.enable = 1;
delay_us(1);
low = lcd.data;
lcd.enable = 0;
set_tris_lcd(LCD_WRITE);
return( (high<<4) | low);
}

void lcd_send_nibble( BYTE n ) {
lcd.data = n;
delay_cycles(1);
lcd.enable = 1;
delay_us(2);
lcd.enable = 0;
}

void lcd_send_byte( BYTE address, BYTE n ) {

lcd.rs = 0;
while ( bit_test(lcd_read_byte(),7) ) ;
lcd.rs = address;
delay_cycles(1);
lcd.rw = 0;
delay_cycles(1);
lcd.enable = 0;
lcd_send_nibble(n >> 4);
lcd_send_nibble(n & 0xf);
}

void lcd_init() {
BYTE i;
set_tris_lcd(LCD_WRITE);
lcd.rs = 0;
lcd.rw = 0;
lcd.enable = 0;
delay_ms(15);
for(i=1;i<=3;++i) {
lcd_send_nibble(3);
delay_ms(5);
}
lcd_send_nibble(2);
for(i=0;i<=3;++i)
lcd_send_byte(0,LCD_INIT_STRING[i]);
}

void lcd_gotoxy( BYTE x, BYTE y) {
BYTE address;
//lcd_gotoxy(1,1); linha 1
//lcd_gotoxy(1,4); linha 2
//lcd_gotoxy(1,2); linha 3
//lcd_gotoxy(1,3); linha 4
if(Y==0)
address=0;
if(y==1)
address=0x40;
if(y==2)
address=0x14;
if(y==3)
address=0x54;
address+=x-1;
lcd_send_byte(0,0x80|address);
}

void lcd_putc( char c) {
switch (c) {
case '\f' : lcd_send_byte(0,1);
delay_ms(2);
break;
case '\n' :lcd_gotoxy(1,2); break;

case '\b' : lcd_send_byte(0,0x10); break;
default : lcd_send_byte(1,c); break;
}
}

char lcd_getc( BYTE x, BYTE y) {
char value;

lcd_gotoxy(x,y);
while ( bit_test(lcd_read_byte(),7) ); // wait until busy flag is low
lcd.rs=1;
value = lcd_read_byte();
lcd.rs=0;
return(value);
}

regards

Display posts from previous:

	CCS Forum Index -> General CCS C Discussion	All times are GMT - 6 Hours
Page 1 of 1

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum