//*****************************************************************************
//
// File Name : 'lcd_lib.h'
// Title : 8 and 4 bit LCd interface
// Author : Scienceprog.com - Copyright (C) 2007
// Created : 2007-03-29
// Revised : 2007-08-08
// Version : 1.0
// Target MCU : Atmel AVR series
//
// This code is distributed under the GNU Public License
// which can be found at [url]http://www.gnu.org/licenses/gpl.txt[/url]
//
//*****************************************************************************
#ifndef LCD_LIB
#define LCD_LIB
#include <inttypes.h>
#include <avr/io.h>
#include <avr/pgmspace.h>
#include <util/delay.h>
//Uncomment this if LCD 4 bit interface is used
//******************************************
#define LCD_4bit
//***********************************************
#define LCD_RS 0 //define MCU pin connected to LCD RS
#define LCD_RW 1 //define MCU pin connected to LCD R/W
#define LCD_E 2 //define MCU pin connected to LCD E
#define LCD_D0 0 //define MCU pin connected to LCD D0
#define LCD_D1 1 //define MCU pin connected to LCD D1
#define LCD_D2 2 //define MCU pin connected to LCD D1
#define LCD_D3 3 //define MCU pin connected to LCD D2
#define LCD_D4 4 //define MCU pin connected to LCD D3
#define LCD_D5 5 //define MCU pin connected to LCD D4
#define LCD_D6 6 //define MCU pin connected to LCD D5
#define LCD_D7 7 //define MCU pin connected to LCD D6
#define LDP PORTD //define MCU port connected to LCD data pins
#define LCP PORTD //define MCU port connected to LCD control pins
#define LDDR DDRD //define MCU direction register for port connected to LCD data pins
#define LCDR DDRD //define MCU direction register for port connected to LCD control pins
#define LCD_CLR 0 //DB0: clear display
#define LCD_HOME 1 //DB1: return to home position
#define LCD_ENTRY_MODE 2 //DB2: set entry mode
#define LCD_ENTRY_INC 1 //DB1: increment
#define LCD_ENTRY_SHIFT 0 //DB2: shift
#define LCD_ON_CTRL 3 //DB3: turn lcd/cursor on
#define LCD_ON_DISPLAY 2 //DB2: turn display on
#define LCD_ON_CURSOR 1 //DB1: turn cursor on
#define LCD_ON_BLINK 0 //DB0: blinking cursor
#define LCD_MOVE 4 //DB4: move cursor/display
#define LCD_MOVE_DISP 3 //DB3: move display (0-> move cursor)
#define LCD_MOVE_RIGHT 2 //DB2: move right (0-> left)
#define LCD_FUNCTION 5 //DB5: function set
#define LCD_FUNCTION_8BIT 4 //DB4: set 8BIT mode (0->4BIT mode)
#define LCD_FUNCTION_2LINES 3 //DB3: two lines (0->one line)
#define LCD_FUNCTION_10DOTS 2 //DB2: 5x10 font (0->5x7 font)
#define LCD_CGRAM 6 //DB6: set CG RAM address
#define LCD_DDRAM 7 //DB7: set DD RAM address
// reading:
#define LCD_BUSY 7 //DB7: LCD is busy
#define LCD_LINES 2 //visible lines
#define LCD_LINE_LENGTH 16 //line length (in characters)
// cursor position to DDRAM mapping
#define LCD_LINE0_DDRAMADDR 0x00
#define LCD_LINE1_DDRAMADDR 0x40
#define LCD_LINE2_DDRAMADDR 0x14
#define LCD_LINE3_DDRAMADDR 0x54
// progress bar defines
#define PROGRESSPIXELS_PER_CHAR 6
void LCDsendChar(uint8_t); //forms data ready to send to 74HC164
void LCDsendCommand(uint8_t); //forms data ready to send to 74HC164
void LCDinit(void); //Initializes LCD
void LCDclr(void); //Clears LCD
void LCDhome(void); //LCD cursor home
void LCDstring(uint8_t*, uint8_t); //Outputs string to LCD
void LCDGotoXY(uint8_t, uint8_t); //Cursor to X Y position
void CopyStringtoLCD(const uint8_t*, uint8_t, uint8_t);//copies flash string to LCD at x,y
void LCDdefinechar(const uint8_t *,uint8_t);//write char to LCD CGRAM
void LCDshiftRight(uint8_t); //shift by n characters Right
void LCDshiftLeft(uint8_t); //shift by n characters Left
void LCDcursorOn(void); //Underline cursor ON
void LCDcursorOnBlink(void); //Underline blinking cursor ON
void LCDcursorOFF(void); //Cursor OFF
void LCDblank(void); //LCD blank but not cleared
void LCDvisible(void); //LCD visible
void LCDcursorLeft(uint8_t); //Shift cursor left by n
void LCDcursorRight(uint8_t); //shif cursor right by n
// displays a horizontal progress bar at the current cursor location
// <progress> is the value the bargraph should indicate
// <maxprogress> is the value at the end of the bargraph
// <length> is the number of LCD characters that the bargraph should cover
//adapted from AVRLIB - displays progress only for 8 bit variables
void LCDprogressBar(uint8_t progress, uint8_t maxprogress, uint8_t length);
const uint8_t LcdCustomChar[] PROGMEM=//define 8 custom LCD chars
{
0x00, 0x1F, 0x00, 0x00, 0x00, 0x00, 0x1F, 0x00, // 0. 0/5 full progress block
0x00, 0x1F, 0x10, 0x10, 0x10, 0x10, 0x1F, 0x00, // 1. 1/5 full progress block
0x00, 0x1F, 0x18, 0x18, 0x18, 0x18, 0x1F, 0x00, // 2. 2/5 full progress block
0x00, 0x1F, 0x1C, 0x1C, 0x1C, 0x1C, 0x1F, 0x00, // 3. 3/5 full progress block
0x00, 0x1F, 0x1E, 0x1E, 0x1E, 0x1E, 0x1F, 0x00, // 4. 4/5 full progress block
0x00, 0x1F, 0x1F, 0x1F, 0x1F, 0x1F, 0x1F, 0x00, // 5. 5/5 full progress block
0x03, 0x07, 0x0F, 0x1F, 0x0F, 0x07, 0x03, 0x00, // 6. rewind arrow
0x18, 0x1C, 0x1E, 0x1F, 0x1E, 0x1C, 0x18, 0x00 // 7. fast-forward arrow
};
void LCDsendChar(uint8_t ch) //Sends Char to LCD
{
#ifdef LCD_4bit
//4 bit part
LDP=(ch&0b11110000);
LCP|=1<<LCD_RS;
LCP|=1<<LCD_E;
_delay_ms(1);
LCP&=~(1<<LCD_E);
LCP&=~(1<<LCD_RS);
_delay_ms(1);
LDP=((ch&0b00001111)<<4);
LCP|=1<<LCD_RS;
LCP|=1<<LCD_E;
_delay_ms(1);
LCP&=~(1<<LCD_E);
LCP&=~(1<<LCD_RS);
_delay_ms(1);
#else
//8 bit part
LDP=ch;
LCP|=1<<LCD_RS;
LCP|=1<<LCD_E;
_delay_ms(1);
LCP&=~(1<<LCD_E);
LCP&=~(1<<LCD_RS);
_delay_ms(1);
#endif
}
void LCDsendCommand(uint8_t cmd) //Sends Command to LCD
{
#ifdef LCD_4bit
//4 bit part
LDP=(cmd&0b11110000);
LCP|=1<<LCD_E;
_delay_ms(1);
LCP&=~(1<<LCD_E);
_delay_ms(1);
LDP=((cmd&0b00001111)<<4);
LCP|=1<<LCD_E;
_delay_ms(1);
LCP&=~(1<<LCD_E);
_delay_ms(1);
#else
//8 bit part
LDP=cmd;
LCP|=1<<LCD_E;
_delay_ms(1);
LCP&=~(1<<LCD_E);
_delay_ms(1);
#endif
}
void LCDinit(void)//Initializes LCD
{
#ifdef LCD_4bit
//4 bit part
_delay_ms(15);
LDP=0x00;
LCP=0x00;
LDDR|=1<<LCD_D7|1<<LCD_D6|1<<LCD_D5|1<<LCD_D4; //Registro de datos
LCDR|=1<<LCD_E|1<<LCD_RW|1<<LCD_RS; //Registro de control
//---------one------
LDP=0<<LCD_D7|0<<LCD_D6|1<<LCD_D5|1<<LCD_D4; //4 bit mode
LCP|=1<<LCD_E|0<<LCD_RW|0<<LCD_RS;
_delay_ms(1);
LCP&=~(1<<LCD_E);
_delay_ms(5);
//-----------two-----------
LDP=0<<LCD_D7|0<<LCD_D6|1<<LCD_D5|1<<LCD_D4; //4 bit mode
LCP|=1<<LCD_E|0<<LCD_RW|0<<LCD_RS;
_delay_ms(1);
LCP&=~(1<<LCD_E);
_delay_ms(1);
//-------three-------------
LDP=0<<LCD_D7|0<<LCD_D6|1<<LCD_D5|0<<LCD_D4; //4 bit mode
LCP|=1<<LCD_E|0<<LCD_RW|0<<LCD_RS;
_delay_ms(1);
LCP&=~(1<<LCD_E);
_delay_ms(1);
//--------4 bit--dual line---------------
LCDsendCommand(0b00101000);
//-----increment address, invisible cursor shift------
LCDsendCommand(0b00001100);
//init 8 custom chars
uint8_t ch=0, chn=0;
while(ch<64)
{
LCDdefinechar((LcdCustomChar+ch),chn++);
ch=ch+8;
}
#else
//8 bit part
_delay_ms(15);
LDP=0x00;
LCP=0x00;
LDDR|=1<<LCD_D7|1<<LCD_D6|1<<LCD_D5|1<<LCD_D4|1<<LCD_D3
|1<<LCD_D2|1<<LCD_D1|1<<LCD_D0;
LCDR|=1<<LCD_E|1<<LCD_RW|1<<LCD_RS;
//---------one------
LDP=0<<LCD_D7|0<<LCD_D6|1<<LCD_D5|1<<LCD_D4|0<<LCD_D3
|0<<LCD_D2|0<<LCD_D1|0<<LCD_D0; //8 it mode
LCP|=1<<LCD_E|0<<LCD_RW|0<<LCD_RS;
_delay_ms(1);
LCP&=~(1<<LCD_E);
_delay_ms(1);
//-----------two-----------
LDP=0<<LCD_D7|0<<LCD_D6|1<<LCD_D5|1<<LCD_D4|0<<LCD_D3
|0<<LCD_D2|0<<LCD_D1|0<<LCD_D0; //8 it mode
LCP|=1<<LCD_E|0<<LCD_RW|0<<LCD_RS;
_delay_ms(1);
LCP&=~(1<<LCD_E);
_delay_ms(1);
//-------three-------------
LDP=0<<LCD_D7|0<<LCD_D6|1<<LCD_D5|1<<LCD_D4|0<<LCD_D3
|0<<LCD_D2|0<<LCD_D1|0<<LCD_D0; //8 it mode
LCP|=1<<LCD_E|0<<LCD_RW|0<<LCD_RS;
_delay_ms(1);
LCP&=~(1<<LCD_E);
_delay_ms(1);
//--------8 bit dual line----------
LDP=0<<LCD_D7|0<<LCD_D6|1<<LCD_D5|1<<LCD_D4|1<<LCD_D3
|0<<LCD_D2|0<<LCD_D1|0<<LCD_D0; //8 it mode
LCP|=1<<LCD_E|0<<LCD_RW|0<<LCD_RS;
_delay_ms(1);
LCP&=~(1<<LCD_E);
_delay_ms(1);
//-----increment address, invisible cursor shift------
LDP=0<<LCD_D7|0<<LCD_D6|0<<LCD_D5|0<<LCD_D4|1<<LCD_D3
|1<<LCD_D2|0<<LCD_D1|0<<LCD_D0; //8 it mode
LCP|=1<<LCD_E|0<<LCD_RW|0<<LCD_RS;
_delay_ms(1);
LCP&=~(1<<LCD_E);
_delay_ms(5);
//init custom chars
uint8_t ch=0, chn=0;
while(ch<64)
{
LCDdefinechar((LcdCustomChar+ch),chn++);
ch=ch+8;
}
#endif
}
void LCDclr(void) //Clears LCD
{
LCDsendCommand(1<<LCD_CLR);
}
void LCDhome(void) //LCD cursor home
{
LCDsendCommand(1<<LCD_HOME);
}
void LCDstring(uint8_t* data, uint8_t nBytes) //Outputs string to LCD
{
register uint8_t i;
// check to make sure we have a good pointer
if (!data) return;
// print data
for(i=0; i<nBytes; i++)
{
LCDsendChar(data[i]);
}
}
void LCDGotoXY(uint8_t x, uint8_t y) //Cursor to X Y position
{
register uint8_t DDRAMAddr;
// remap lines into proper order
switch(y)
{
case 0: DDRAMAddr = LCD_LINE0_DDRAMADDR+x; break;
case 1: DDRAMAddr = LCD_LINE1_DDRAMADDR+x; break;
case 2: DDRAMAddr = LCD_LINE2_DDRAMADDR+x; break;
case 3: DDRAMAddr = LCD_LINE3_DDRAMADDR+x; break;
default: DDRAMAddr = LCD_LINE0_DDRAMADDR+x;
}
// set data address
LCDsendCommand(1<<LCD_DDRAM | DDRAMAddr);
}
//Copies string from flash memory to LCD at x y position
//const uint8_t welcomeln1[] PROGMEM="AVR LCD DEMO\0";
//CopyStringtoLCD(welcomeln1, 3, 1);
void CopyStringtoLCD(const uint8_t *FlashLoc, uint8_t x, uint8_t y)
{
uint8_t i;
LCDGotoXY(x,y);
for(i=0;(uint8_t)pgm_read_byte(&FlashLoc[i]);i++)
{
LCDsendChar((uint8_t)pgm_read_byte(&FlashLoc[i]));
}
}
//defines char symbol in CGRAM
/*
const uint8_t backslash[] PROGMEM=
{
0b00000000,//back slash
0b00010000,
0b00001000,
0b00000100,
0b00000010,
0b00000001,
0b00000000,
0b00000000
};
LCDdefinechar(backslash,0);
*/
void LCDdefinechar(const uint8_t *pc,uint8_t char_code){
uint8_t a, pcc;
uint16_t i;
a=(char_code<<3)|0x40;
for (i=0; i<8; i++){
pcc=pgm_read_byte(&pc[i]);
LCDsendCommand(a++);
LCDsendChar(pcc);
}
}
void LCDshiftLeft(uint8_t n) //Scrol n of characters Right
{
uint8_t i;
for (i=0;i<n;i++)
{
LCDsendCommand(0x1E);
}
}
void LCDshiftRight(uint8_t n) //Scrol n of characters Left
{
uint8_t i;
for (i=0;i<n;i++)
{
LCDsendCommand(0x18);
}
}
void LCDcursorOn(void) //displays LCD cursor
{
LCDsendCommand(0x0E);
}
void LCDcursorOnBlink(void) //displays LCD blinking cursor
{
LCDsendCommand(0x0F);
}
void LCDcursorOFF(void) //turns OFF cursor
{
LCDsendCommand(0x0C);
}
void LCDblank(void) //blanks LCD
{
LCDsendCommand(0x08);
}
void LCDvisible(void) //Shows LCD
{
LCDsendCommand(0x0C);
}
void LCDcursorLeft(uint8_t n) //Moves cursor by n poisitions left
{
uint8_t i;
for (i=0;i<n;i++)
{
LCDsendCommand(0x10);
}
}
void LCDcursorRight(uint8_t n) //Moves cursor by n poisitions left
{
uint8_t i;
for (i=0;i<n;i++)
{
LCDsendCommand(0x14);
}
}
//adapted fro mAVRLIB
void LCDprogressBar(uint8_t progress, uint8_t maxprogress, uint8_t length)
{
uint8_t i;
uint16_t pixelprogress;
uint8_t c;
// draw a progress bar displaying (progress / maxprogress)
// starting from the current cursor position
// with a total length of "length" characters
// ***note, LCD chars 0-5 must be programmed as the bar characters
// char 0 = empty ... char 5 = full
// total pixel length of bargraph equals length*PROGRESSPIXELS_PER_CHAR;
// pixel length of bar itself is
pixelprogress = ((progress*(length*PROGRESSPIXELS_PER_CHAR))/maxprogress);
// print exactly "length" characters
for(i=0; i<length; i++)
{
// check if this is a full block, or partial or empty
// (u16) cast is needed to avoid sign comparison warning
if( ((i*(uint16_t)PROGRESSPIXELS_PER_CHAR)+5) > pixelprogress )
{
// this is a partial or empty block
if( ((i*(uint16_t)PROGRESSPIXELS_PER_CHAR)) > pixelprogress )
{
// this is an empty block
// use space character?
c = 0;
}
else
{
// this is a partial block
c = pixelprogress % PROGRESSPIXELS_PER_CHAR;
}
}
else
{
// this is a full block
c = 5;
}
// write character to display
LCDsendChar(c);
}
}
#endif
esahabilitado con mi programador, ya que habilita o deshabilita el uso del ISP. jejeje 
