You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
593 lines
20 KiB
593 lines
20 KiB
7 years ago
|
/****************************************************************************
|
||
|
|
Title: HD44780U LCD library
|
||
|
|
Author: Peter Fleury <pfleury@gmx.ch> http://tinyurl.com/peterfleury
|
||
|
|
License: GNU General Public License Version 3
|
||
|
|
File: $Id: lcd.c,v 1.15.2.2 2015/01/17 12:16:05 peter Exp $
|
||
|
|
Software: AVR-GCC 3.3
|
||
|
|
Target: any AVR device, memory mapped mode only for AT90S4414/8515/Mega
|
||
|
|
|
||
|
|
DESCRIPTION
|
||
|
|
Basic routines for interfacing a HD44780U-based text lcd display
|
||
|
|
|
||
|
|
Originally based on Volker Oth's lcd library,
|
||
|
|
changed lcd_init(), added additional constants for lcd_command(),
|
||
|
|
added 4-bit I/O mode, improved and optimized code.
|
||
|
|
|
||
|
|
Library can be operated in memory mapped mode (LCD_IO_MODE=0) or in
|
||
|
|
4-bit IO port mode (LCD_IO_MODE=1). 8-bit IO port mode not supported.
|
||
|
|
|
||
|
|
Memory mapped mode compatible with Kanda STK200, but supports also
|
||
|
|
generation of R/W signal through A8 address line.
|
||
|
|
|
||
|
|
USAGE
|
||
|
|
See the C include lcd.h file for a description of each function
|
||
|
|
|
||
|
|
*****************************************************************************/
|
||
|
|
#include <inttypes.h>
|
||
|
|
#include <avr/io.h>
|
||
|
|
#include <avr/pgmspace.h>
|
||
|
|
#include <util/delay.h>
|
||
|
|
#include "hd44780.h"
|
||
|
|
|
||
|
|
/*
|
||
|
|
** constants/macros
|
||
|
|
*/
|
||
|
|
#define DDR(x) (*(&x - 1)) /* address of data direction register of port x */
|
||
|
|
#if defined(__AVR_ATmega64__) || defined(__AVR_ATmega128__)
|
||
|
|
/* on ATmega64/128 PINF is on port 0x00 and not 0x60 */
|
||
|
|
#define PIN(x) ( &PORTF==&(x) ? _SFR_IO8(0x00) : (*(&x - 2)) )
|
||
|
|
#else
|
||
|
|
#define PIN(x) (*(&x - 2)) /* address of input register of port x */
|
||
|
|
#endif
|
||
|
|
|
||
|
|
|
||
|
|
#if LCD_IO_MODE
|
||
|
|
#define lcd_e_delay() _delay_us(LCD_DELAY_ENABLE_PULSE)
|
||
|
|
#define lcd_e_high() LCD_E_PORT |= _BV(LCD_E_PIN);
|
||
|
|
#define lcd_e_low() LCD_E_PORT &= ~_BV(LCD_E_PIN);
|
||
|
|
#define lcd_e_toggle() toggle_e()
|
||
|
|
#define lcd_rw_high() LCD_RW_PORT |= _BV(LCD_RW_PIN)
|
||
|
|
#define lcd_rw_low() LCD_RW_PORT &= ~_BV(LCD_RW_PIN)
|
||
|
|
#define lcd_rs_high() LCD_RS_PORT |= _BV(LCD_RS_PIN)
|
||
|
|
#define lcd_rs_low() LCD_RS_PORT &= ~_BV(LCD_RS_PIN)
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#if LCD_IO_MODE
|
||
|
|
#if LCD_LINES==1
|
||
|
|
#define LCD_FUNCTION_DEFAULT LCD_FUNCTION_4BIT_1LINE
|
||
|
|
#else
|
||
|
|
#define LCD_FUNCTION_DEFAULT LCD_FUNCTION_4BIT_2LINES
|
||
|
|
#endif
|
||
|
|
#else
|
||
|
|
#if LCD_LINES==1
|
||
|
|
#define LCD_FUNCTION_DEFAULT LCD_FUNCTION_8BIT_1LINE
|
||
|
|
#else
|
||
|
|
#define LCD_FUNCTION_DEFAULT LCD_FUNCTION_8BIT_2LINES
|
||
|
|
#endif
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#if LCD_CONTROLLER_KS0073
|
||
|
|
#if LCD_LINES==4
|
||
|
|
|
||
|
|
#define KS0073_EXTENDED_FUNCTION_REGISTER_ON 0x2C /* |0|010|1100 4-bit mode, extension-bit RE = 1 */
|
||
|
|
#define KS0073_EXTENDED_FUNCTION_REGISTER_OFF 0x28 /* |0|010|1000 4-bit mode, extension-bit RE = 0 */
|
||
|
|
#define KS0073_4LINES_MODE 0x09 /* |0|000|1001 4 lines mode */
|
||
|
|
|
||
|
|
#endif
|
||
|
|
#endif
|
||
|
|
|
||
|
|
/*
|
||
|
|
** function prototypes
|
||
|
|
*/
|
||
|
|
#if LCD_IO_MODE
|
||
|
|
static void toggle_e(void);
|
||
|
|
#endif
|
||
|
|
|
||
|
|
/*
|
||
|
|
** local functions
|
||
|
|
*/
|
||
|
|
|
||
|
|
|
||
|
|
/*************************************************************************
|
||
|
|
delay for a minimum of <us> microseconds
|
||
|
|
the number of loops is calculated at compile-time from MCU clock frequency
|
||
|
|
*************************************************************************/
|
||
|
|
#define delay(us) _delay_us(us)
|
||
|
|
|
||
|
|
|
||
|
|
#if LCD_IO_MODE
|
||
|
|
/* toggle Enable Pin to initiate write */
|
||
|
|
static void toggle_e(void)
|
||
|
|
{
|
||
|
|
lcd_e_high();
|
||
|
|
lcd_e_delay();
|
||
|
|
lcd_e_low();
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
|
||
|
|
|
||
|
|
/*************************************************************************
|
||
|
|
Low-level function to write byte to LCD controller
|
||
|
|
Input: data byte to write to LCD
|
||
|
|
rs 1: write data
|
||
|
|
0: write instruction
|
||
|
|
Returns: none
|
||
|
|
*************************************************************************/
|
||
|
|
#if LCD_IO_MODE
|
||
|
|
static void lcd_write(uint8_t data,uint8_t rs)
|
||
|
|
{
|
||
|
|
unsigned char dataBits ;
|
||
|
|
|
||
|
|
|
||
|
|
if (rs) { /* write data (RS=1, RW=0) */
|
||
|
|
lcd_rs_high();
|
||
|
|
} else { /* write instruction (RS=0, RW=0) */
|
||
|
|
lcd_rs_low();
|
||
|
|
}
|
||
|
|
lcd_rw_low(); /* RW=0 write mode */
|
||
|
|
|
||
|
|
if ( ( &LCD_DATA0_PORT == &LCD_DATA1_PORT) && ( &LCD_DATA1_PORT == &LCD_DATA2_PORT ) && ( &LCD_DATA2_PORT == &LCD_DATA3_PORT )
|
||
|
|
&& (LCD_DATA0_PIN == 0) && (LCD_DATA1_PIN == 1) && (LCD_DATA2_PIN == 2) && (LCD_DATA3_PIN == 3) )
|
||
|
|
{
|
||
|
|
/* configure data pins as output */
|
||
|
|
DDR(LCD_DATA0_PORT) |= 0x0F;
|
||
|
|
|
||
|
|
/* output high nibble first */
|
||
|
|
dataBits = LCD_DATA0_PORT & 0xF0;
|
||
|
|
LCD_DATA0_PORT = dataBits |((data>>4)&0x0F);
|
||
|
|
lcd_e_toggle();
|
||
|
|
|
||
|
|
/* output low nibble */
|
||
|
|
LCD_DATA0_PORT = dataBits | (data&0x0F);
|
||
|
|
lcd_e_toggle();
|
||
|
|
|
||
|
|
/* all data pins high (inactive) */
|
||
|
|
LCD_DATA0_PORT = dataBits | 0x0F;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
/* configure data pins as output */
|
||
|
|
DDR(LCD_DATA0_PORT) |= _BV(LCD_DATA0_PIN);
|
||
|
|
DDR(LCD_DATA1_PORT) |= _BV(LCD_DATA1_PIN);
|
||
|
|
DDR(LCD_DATA2_PORT) |= _BV(LCD_DATA2_PIN);
|
||
|
|
DDR(LCD_DATA3_PORT) |= _BV(LCD_DATA3_PIN);
|
||
|
|
|
||
|
|
/* output high nibble first */
|
||
|
|
LCD_DATA3_PORT &= ~_BV(LCD_DATA3_PIN);
|
||
|
|
LCD_DATA2_PORT &= ~_BV(LCD_DATA2_PIN);
|
||
|
|
LCD_DATA1_PORT &= ~_BV(LCD_DATA1_PIN);
|
||
|
|
LCD_DATA0_PORT &= ~_BV(LCD_DATA0_PIN);
|
||
|
|
if(data & 0x80) LCD_DATA3_PORT |= _BV(LCD_DATA3_PIN);
|
||
|
|
if(data & 0x40) LCD_DATA2_PORT |= _BV(LCD_DATA2_PIN);
|
||
|
|
if(data & 0x20) LCD_DATA1_PORT |= _BV(LCD_DATA1_PIN);
|
||
|
|
if(data & 0x10) LCD_DATA0_PORT |= _BV(LCD_DATA0_PIN);
|
||
|
|
lcd_e_toggle();
|
||
|
|
|
||
|
|
/* output low nibble */
|
||
|
|
LCD_DATA3_PORT &= ~_BV(LCD_DATA3_PIN);
|
||
|
|
LCD_DATA2_PORT &= ~_BV(LCD_DATA2_PIN);
|
||
|
|
LCD_DATA1_PORT &= ~_BV(LCD_DATA1_PIN);
|
||
|
|
LCD_DATA0_PORT &= ~_BV(LCD_DATA0_PIN);
|
||
|
|
if(data & 0x08) LCD_DATA3_PORT |= _BV(LCD_DATA3_PIN);
|
||
|
|
if(data & 0x04) LCD_DATA2_PORT |= _BV(LCD_DATA2_PIN);
|
||
|
|
if(data & 0x02) LCD_DATA1_PORT |= _BV(LCD_DATA1_PIN);
|
||
|
|
if(data & 0x01) LCD_DATA0_PORT |= _BV(LCD_DATA0_PIN);
|
||
|
|
lcd_e_toggle();
|
||
|
|
|
||
|
|
/* all data pins high (inactive) */
|
||
|
|
LCD_DATA0_PORT |= _BV(LCD_DATA0_PIN);
|
||
|
|
LCD_DATA1_PORT |= _BV(LCD_DATA1_PIN);
|
||
|
|
LCD_DATA2_PORT |= _BV(LCD_DATA2_PIN);
|
||
|
|
LCD_DATA3_PORT |= _BV(LCD_DATA3_PIN);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
#else
|
||
|
|
#define lcd_write(d,rs) if (rs) *(volatile uint8_t*)(LCD_IO_DATA) = d; else *(volatile uint8_t*)(LCD_IO_FUNCTION) = d;
|
||
|
|
/* rs==0 -> write instruction to LCD_IO_FUNCTION */
|
||
|
|
/* rs==1 -> write data to LCD_IO_DATA */
|
||
|
|
#endif
|
||
|
|
|
||
|
|
|
||
|
|
/*************************************************************************
|
||
|
|
Low-level function to read byte from LCD controller
|
||
|
|
Input: rs 1: read data
|
||
|
|
0: read busy flag / address counter
|
||
|
|
Returns: byte read from LCD controller
|
||
|
|
*************************************************************************/
|
||
|
|
#if LCD_IO_MODE
|
||
|
|
static uint8_t lcd_read(uint8_t rs)
|
||
|
|
{
|
||
|
|
uint8_t data;
|
||
|
|
|
||
|
|
|
||
|
|
if (rs)
|
||
|
|
lcd_rs_high(); /* RS=1: read data */
|
||
|
|
else
|
||
|
|
lcd_rs_low(); /* RS=0: read busy flag */
|
||
|
|
lcd_rw_high(); /* RW=1 read mode */
|
||
|
|
|
||
|
|
if ( ( &LCD_DATA0_PORT == &LCD_DATA1_PORT) && ( &LCD_DATA1_PORT == &LCD_DATA2_PORT ) && ( &LCD_DATA2_PORT == &LCD_DATA3_PORT )
|
||
|
|
&& ( LCD_DATA0_PIN == 0 )&& (LCD_DATA1_PIN == 1) && (LCD_DATA2_PIN == 2) && (LCD_DATA3_PIN == 3) )
|
||
|
|
{
|
||
|
|
DDR(LCD_DATA0_PORT) &= 0xF0; /* configure data pins as input */
|
||
|
|
|
||
|
|
lcd_e_high();
|
||
|
|
lcd_e_delay();
|
||
|
|
data = PIN(LCD_DATA0_PORT) << 4; /* read high nibble first */
|
||
|
|
lcd_e_low();
|
||
|
|
|
||
|
|
lcd_e_delay(); /* Enable 500ns low */
|
||
|
|
|
||
|
|
lcd_e_high();
|
||
|
|
lcd_e_delay();
|
||
|
|
data |= PIN(LCD_DATA0_PORT)&0x0F; /* read low nibble */
|
||
|
|
lcd_e_low();
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
/* configure data pins as input */
|
||
|
|
DDR(LCD_DATA0_PORT) &= ~_BV(LCD_DATA0_PIN);
|
||
|
|
DDR(LCD_DATA1_PORT) &= ~_BV(LCD_DATA1_PIN);
|
||
|
|
DDR(LCD_DATA2_PORT) &= ~_BV(LCD_DATA2_PIN);
|
||
|
|
DDR(LCD_DATA3_PORT) &= ~_BV(LCD_DATA3_PIN);
|
||
|
|
|
||
|
|
/* read high nibble first */
|
||
|
|
lcd_e_high();
|
||
|
|
lcd_e_delay();
|
||
|
|
data = 0;
|
||
|
|
if ( PIN(LCD_DATA0_PORT) & _BV(LCD_DATA0_PIN) ) data |= 0x10;
|
||
|
|
if ( PIN(LCD_DATA1_PORT) & _BV(LCD_DATA1_PIN) ) data |= 0x20;
|
||
|
|
if ( PIN(LCD_DATA2_PORT) & _BV(LCD_DATA2_PIN) ) data |= 0x40;
|
||
|
|
if ( PIN(LCD_DATA3_PORT) & _BV(LCD_DATA3_PIN) ) data |= 0x80;
|
||
|
|
lcd_e_low();
|
||
|
|
|
||
|
|
lcd_e_delay(); /* Enable 500ns low */
|
||
|
|
|
||
|
|
/* read low nibble */
|
||
|
|
lcd_e_high();
|
||
|
|
lcd_e_delay();
|
||
|
|
if ( PIN(LCD_DATA0_PORT) & _BV(LCD_DATA0_PIN) ) data |= 0x01;
|
||
|
|
if ( PIN(LCD_DATA1_PORT) & _BV(LCD_DATA1_PIN) ) data |= 0x02;
|
||
|
|
if ( PIN(LCD_DATA2_PORT) & _BV(LCD_DATA2_PIN) ) data |= 0x04;
|
||
|
|
if ( PIN(LCD_DATA3_PORT) & _BV(LCD_DATA3_PIN) ) data |= 0x08;
|
||
|
|
lcd_e_low();
|
||
|
|
}
|
||
|
|
return data;
|
||
|
|
}
|
||
|
|
#else
|
||
|
|
#define lcd_read(rs) (rs) ? *(volatile uint8_t*)(LCD_IO_DATA+LCD_IO_READ) : *(volatile uint8_t*)(LCD_IO_FUNCTION+LCD_IO_READ)
|
||
|
|
/* rs==0 -> read instruction from LCD_IO_FUNCTION */
|
||
|
|
/* rs==1 -> read data from LCD_IO_DATA */
|
||
|
|
#endif
|
||
|
|
|
||
|
|
|
||
|
|
/*************************************************************************
|
||
|
|
loops while lcd is busy, returns address counter
|
||
|
|
*************************************************************************/
|
||
|
|
static uint8_t lcd_waitbusy(void)
|
||
|
|
|
||
|
|
{
|
||
|
|
register uint8_t c;
|
||
|
|
|
||
|
|
/* wait until busy flag is cleared */
|
||
|
|
while ( (c=lcd_read(0)) & (1<<LCD_BUSY)) {}
|
||
|
|
|
||
|
|
/* the address counter is updated 4us after the busy flag is cleared */
|
||
|
|
delay(LCD_DELAY_BUSY_FLAG);
|
||
|
|
|
||
|
|
/* now read the address counter */
|
||
|
|
return (lcd_read(0)); // return address counter
|
||
|
|
|
||
|
|
}/* lcd_waitbusy */
|
||
|
|
|
||
|
|
|
||
|
|
/*************************************************************************
|
||
|
|
Move cursor to the start of next line or to the first line if the cursor
|
||
|
|
is already on the last line.
|
||
|
|
*************************************************************************/
|
||
|
|
static inline void lcd_newline(uint8_t pos)
|
||
|
|
{
|
||
|
|
register uint8_t addressCounter;
|
||
|
|
|
||
|
|
|
||
|
|
#if LCD_LINES==1
|
||
|
|
addressCounter = 0;
|
||
|
|
#endif
|
||
|
|
#if LCD_LINES==2
|
||
|
|
if ( pos < (LCD_START_LINE2) )
|
||
|
|
addressCounter = LCD_START_LINE2;
|
||
|
|
else
|
||
|
|
addressCounter = LCD_START_LINE1;
|
||
|
|
#endif
|
||
|
|
#if LCD_LINES==4
|
||
|
|
#if KS0073_4LINES_MODE
|
||
|
|
if ( pos < LCD_START_LINE2 )
|
||
|
|
addressCounter = LCD_START_LINE2;
|
||
|
|
else if ( (pos >= LCD_START_LINE2) && (pos < LCD_START_LINE3) )
|
||
|
|
addressCounter = LCD_START_LINE3;
|
||
|
|
else if ( (pos >= LCD_START_LINE3) && (pos < LCD_START_LINE4) )
|
||
|
|
addressCounter = LCD_START_LINE4;
|
||
|
|
else
|
||
|
|
addressCounter = LCD_START_LINE1;
|
||
|
|
#else
|
||
|
|
if ( pos < LCD_START_LINE3 )
|
||
|
|
addressCounter = LCD_START_LINE2;
|
||
|
|
else if ( (pos >= LCD_START_LINE2) && (pos < LCD_START_LINE4) )
|
||
|
|
addressCounter = LCD_START_LINE3;
|
||
|
|
else if ( (pos >= LCD_START_LINE3) && (pos < LCD_START_LINE2) )
|
||
|
|
addressCounter = LCD_START_LINE4;
|
||
|
|
else
|
||
|
|
addressCounter = LCD_START_LINE1;
|
||
|
|
#endif
|
||
|
|
#endif
|
||
|
|
lcd_command((1<<LCD_DDRAM)+addressCounter);
|
||
|
|
|
||
|
|
}/* lcd_newline */
|
||
|
|
|
||
|
|
|
||
|
|
/*
|
||
|
|
** PUBLIC FUNCTIONS
|
||
|
|
*/
|
||
|
|
|
||
|
|
/*************************************************************************
|
||
|
|
Send LCD controller instruction command
|
||
|
|
Input: instruction to send to LCD controller, see HD44780 data sheet
|
||
|
|
Returns: none
|
||
|
|
*************************************************************************/
|
||
|
|
void lcd_command(uint8_t cmd)
|
||
|
|
{
|
||
|
|
lcd_waitbusy();
|
||
|
|
lcd_write(cmd,0);
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/*************************************************************************
|
||
|
|
Send data byte to LCD controller
|
||
|
|
Input: data to send to LCD controller, see HD44780 data sheet
|
||
|
|
Returns: none
|
||
|
|
*************************************************************************/
|
||
|
|
void lcd_data(uint8_t data)
|
||
|
|
{
|
||
|
|
lcd_waitbusy();
|
||
|
|
lcd_write(data,1);
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
/*************************************************************************
|
||
|
|
Set cursor to specified position
|
||
|
|
Input: x horizontal position (0: left most position)
|
||
|
|
y vertical position (0: first line)
|
||
|
|
Returns: none
|
||
|
|
*************************************************************************/
|
||
|
|
void lcd_gotoxy(uint8_t x, uint8_t y)
|
||
|
|
{
|
||
|
|
#if LCD_LINES==1
|
||
|
|
lcd_command((1<<LCD_DDRAM)+LCD_START_LINE1+x);
|
||
|
|
#endif
|
||
|
|
#if LCD_LINES==2
|
||
|
|
if ( y==0 )
|
||
|
|
lcd_command((1<<LCD_DDRAM)+LCD_START_LINE1+x);
|
||
|
|
else
|
||
|
|
lcd_command((1<<LCD_DDRAM)+LCD_START_LINE2+x);
|
||
|
|
#endif
|
||
|
|
#if LCD_LINES==4
|
||
|
|
if ( y==0 )
|
||
|
|
lcd_command((1<<LCD_DDRAM)+LCD_START_LINE1+x);
|
||
|
|
else if ( y==1)
|
||
|
|
lcd_command((1<<LCD_DDRAM)+LCD_START_LINE2+x);
|
||
|
|
else if ( y==2)
|
||
|
|
lcd_command((1<<LCD_DDRAM)+LCD_START_LINE3+x);
|
||
|
|
else /* y==3 */
|
||
|
|
lcd_command((1<<LCD_DDRAM)+LCD_START_LINE4+x);
|
||
|
|
#endif
|
||
|
|
|
||
|
|
}/* lcd_gotoxy */
|
||
|
|
|
||
|
|
|
||
|
|
/*************************************************************************
|
||
|
|
*************************************************************************/
|
||
|
|
int lcd_getxy(void)
|
||
|
|
{
|
||
|
|
return lcd_waitbusy();
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/*************************************************************************
|
||
|
|
Clear display and set cursor to home position
|
||
|
|
*************************************************************************/
|
||
|
|
void lcd_clrscr(void)
|
||
|
|
{
|
||
|
|
lcd_command(1<<LCD_CLR);
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/*************************************************************************
|
||
|
|
Set cursor to home position
|
||
|
|
*************************************************************************/
|
||
|
|
void lcd_home(void)
|
||
|
|
{
|
||
|
|
lcd_command(1<<LCD_HOME);
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/*************************************************************************
|
||
|
|
Display character at current cursor position
|
||
|
|
Input: character to be displayed
|
||
|
|
Returns: none
|
||
|
|
*************************************************************************/
|
||
|
|
void lcd_putc(char c)
|
||
|
|
{
|
||
|
|
uint8_t pos;
|
||
|
|
|
||
|
|
|
||
|
|
pos = lcd_waitbusy(); // read busy-flag and address counter
|
||
|
|
if (c=='\n')
|
||
|
|
{
|
||
|
|
lcd_newline(pos);
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
#if LCD_WRAP_LINES==1
|
||
|
|
#if LCD_LINES==1
|
||
|
|
if ( pos == LCD_START_LINE1+LCD_DISP_LENGTH ) {
|
||
|
|
lcd_write((1<<LCD_DDRAM)+LCD_START_LINE1,0);
|
||
|
|
}
|
||
|
|
#elif LCD_LINES==2
|
||
|
|
if ( pos == LCD_START_LINE1+LCD_DISP_LENGTH ) {
|
||
|
|
lcd_write((1<<LCD_DDRAM)+LCD_START_LINE2,0);
|
||
|
|
}else if ( pos == LCD_START_LINE2+LCD_DISP_LENGTH ){
|
||
|
|
lcd_write((1<<LCD_DDRAM)+LCD_START_LINE1,0);
|
||
|
|
}
|
||
|
|
#elif LCD_LINES==4
|
||
|
|
if ( pos == LCD_START_LINE1+LCD_DISP_LENGTH ) {
|
||
|
|
lcd_write((1<<LCD_DDRAM)+LCD_START_LINE2,0);
|
||
|
|
}else if ( pos == LCD_START_LINE2+LCD_DISP_LENGTH ) {
|
||
|
|
lcd_write((1<<LCD_DDRAM)+LCD_START_LINE3,0);
|
||
|
|
}else if ( pos == LCD_START_LINE3+LCD_DISP_LENGTH ) {
|
||
|
|
lcd_write((1<<LCD_DDRAM)+LCD_START_LINE4,0);
|
||
|
|
}else if ( pos == LCD_START_LINE4+LCD_DISP_LENGTH ) {
|
||
|
|
lcd_write((1<<LCD_DDRAM)+LCD_START_LINE1,0);
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
lcd_waitbusy();
|
||
|
|
#endif
|
||
|
|
lcd_write(c, 1);
|
||
|
|
}
|
||
|
|
|
||
|
|
}/* lcd_putc */
|
||
|
|
|
||
|
|
|
||
|
|
/*************************************************************************
|
||
|
|
Display string without auto linefeed
|
||
|
|
Input: string to be displayed
|
||
|
|
Returns: none
|
||
|
|
*************************************************************************/
|
||
|
|
void lcd_puts(const char *s)
|
||
|
|
/* print string on lcd (no auto linefeed) */
|
||
|
|
{
|
||
|
|
register char c;
|
||
|
|
|
||
|
|
while ( (c = *s++) ) {
|
||
|
|
lcd_putc(c);
|
||
|
|
}
|
||
|
|
|
||
|
|
}/* lcd_puts */
|
||
|
|
|
||
|
|
|
||
|
|
/*************************************************************************
|
||
|
|
Display string from program memory without auto linefeed
|
||
|
|
Input: string from program memory be be displayed
|
||
|
|
Returns: none
|
||
|
|
*************************************************************************/
|
||
|
|
void lcd_puts_p(const char *progmem_s)
|
||
|
|
/* print string from program memory on lcd (no auto linefeed) */
|
||
|
|
{
|
||
|
|
register char c;
|
||
|
|
|
||
|
|
while ( (c = pgm_read_byte(progmem_s++)) ) {
|
||
|
|
lcd_putc(c);
|
||
|
|
}
|
||
|
|
|
||
|
|
}/* lcd_puts_p */
|
||
|
|
|
||
|
|
|
||
|
|
/*************************************************************************
|
||
|
|
Initialize display and select type of cursor
|
||
|
|
Input: dispAttr LCD_DISP_OFF display off
|
||
|
|
LCD_DISP_ON display on, cursor off
|
||
|
|
LCD_DISP_ON_CURSOR display on, cursor on
|
||
|
|
LCD_DISP_CURSOR_BLINK display on, cursor on flashing
|
||
|
|
Returns: none
|
||
|
|
*************************************************************************/
|
||
|
|
void lcd_init(uint8_t dispAttr)
|
||
|
|
{
|
||
|
|
#if LCD_IO_MODE
|
||
|
|
/*
|
||
|
|
* Initialize LCD to 4 bit I/O mode
|
||
|
|
*/
|
||
|
|
|
||
|
|
if ( ( &LCD_DATA0_PORT == &LCD_DATA1_PORT) && ( &LCD_DATA1_PORT == &LCD_DATA2_PORT ) && ( &LCD_DATA2_PORT == &LCD_DATA3_PORT )
|
||
|
|
&& ( &LCD_RS_PORT == &LCD_DATA0_PORT) && ( &LCD_RW_PORT == &LCD_DATA0_PORT) && (&LCD_E_PORT == &LCD_DATA0_PORT)
|
||
|
|
&& (LCD_DATA0_PIN == 0 ) && (LCD_DATA1_PIN == 1) && (LCD_DATA2_PIN == 2) && (LCD_DATA3_PIN == 3)
|
||
|
|
&& (LCD_RS_PIN == 4 ) && (LCD_RW_PIN == 5) && (LCD_E_PIN == 6 ) )
|
||
|
|
{
|
||
|
|
/* configure all port bits as output (all LCD lines on same port) */
|
||
|
|
DDR(LCD_DATA0_PORT) |= 0x7F;
|
||
|
|
}
|
||
|
|
else if ( ( &LCD_DATA0_PORT == &LCD_DATA1_PORT) && ( &LCD_DATA1_PORT == &LCD_DATA2_PORT ) && ( &LCD_DATA2_PORT == &LCD_DATA3_PORT )
|
||
|
|
&& (LCD_DATA0_PIN == 0 ) && (LCD_DATA1_PIN == 1) && (LCD_DATA2_PIN == 2) && (LCD_DATA3_PIN == 3) )
|
||
|
|
{
|
||
|
|
/* configure all port bits as output (all LCD data lines on same port, but control lines on different ports) */
|
||
|
|
DDR(LCD_DATA0_PORT) |= 0x0F;
|
||
|
|
DDR(LCD_RS_PORT) |= _BV(LCD_RS_PIN);
|
||
|
|
DDR(LCD_RW_PORT) |= _BV(LCD_RW_PIN);
|
||
|
|
DDR(LCD_E_PORT) |= _BV(LCD_E_PIN);
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
/* configure all port bits as output (LCD data and control lines on different ports */
|
||
|
|
DDR(LCD_RS_PORT) |= _BV(LCD_RS_PIN);
|
||
|
|
DDR(LCD_RW_PORT) |= _BV(LCD_RW_PIN);
|
||
|
|
DDR(LCD_E_PORT) |= _BV(LCD_E_PIN);
|
||
|
|
DDR(LCD_DATA0_PORT) |= _BV(LCD_DATA0_PIN);
|
||
|
|
DDR(LCD_DATA1_PORT) |= _BV(LCD_DATA1_PIN);
|
||
|
|
DDR(LCD_DATA2_PORT) |= _BV(LCD_DATA2_PIN);
|
||
|
|
DDR(LCD_DATA3_PORT) |= _BV(LCD_DATA3_PIN);
|
||
|
|
}
|
||
|
|
delay(LCD_DELAY_BOOTUP); /* wait 16ms or more after power-on */
|
||
|
|
|
||
|
|
/* initial write to lcd is 8bit */
|
||
|
|
LCD_DATA1_PORT |= _BV(LCD_DATA1_PIN); // LCD_FUNCTION>>4;
|
||
|
|
LCD_DATA0_PORT |= _BV(LCD_DATA0_PIN); // LCD_FUNCTION_8BIT>>4;
|
||
|
|
lcd_e_toggle();
|
||
|
|
delay(LCD_DELAY_INIT); /* delay, busy flag can't be checked here */
|
||
|
|
|
||
|
|
/* repeat last command */
|
||
|
|
lcd_e_toggle();
|
||
|
|
delay(LCD_DELAY_INIT_REP); /* delay, busy flag can't be checked here */
|
||
|
|
|
||
|
|
/* repeat last command a third time */
|
||
|
|
lcd_e_toggle();
|
||
|
|
delay(LCD_DELAY_INIT_REP); /* delay, busy flag can't be checked here */
|
||
|
|
|
||
|
|
/* now configure for 4bit mode */
|
||
|
|
LCD_DATA0_PORT &= ~_BV(LCD_DATA0_PIN); // LCD_FUNCTION_4BIT_1LINE>>4
|
||
|
|
lcd_e_toggle();
|
||
|
|
delay(LCD_DELAY_INIT_4BIT); /* some displays need this additional delay */
|
||
|
|
|
||
|
|
/* from now the LCD only accepts 4 bit I/O, we can use lcd_command() */
|
||
|
|
#else
|
||
|
|
/*
|
||
|
|
* Initialize LCD to 8 bit memory mapped mode
|
||
|
|
*/
|
||
|
|
|
||
|
|
/* enable external SRAM (memory mapped lcd) and one wait state */
|
||
|
|
MCUCR = _BV(SRE) | _BV(SRW);
|
||
|
|
|
||
|
|
/* reset LCD */
|
||
|
|
delay(LCD_DELAY_BOOTUP); /* wait 16ms after power-on */
|
||
|
|
lcd_write(LCD_FUNCTION_8BIT_1LINE,0); /* function set: 8bit interface */
|
||
|
|
delay(LCD_DELAY_INIT); /* wait 5ms */
|
||
|
|
lcd_write(LCD_FUNCTION_8BIT_1LINE,0); /* function set: 8bit interface */
|
||
|
|
delay(LCD_DELAY_INIT_REP); /* wait 64us */
|
||
|
|
lcd_write(LCD_FUNCTION_8BIT_1LINE,0); /* function set: 8bit interface */
|
||
|
|
delay(LCD_DELAY_INIT_REP); /* wait 64us */
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#if KS0073_4LINES_MODE
|
||
|
|
/* Display with KS0073 controller requires special commands for enabling 4 line mode */
|
||
|
|
lcd_command(KS0073_EXTENDED_FUNCTION_REGISTER_ON);
|
||
|
|
lcd_command(KS0073_4LINES_MODE);
|
||
|
|
lcd_command(KS0073_EXTENDED_FUNCTION_REGISTER_OFF);
|
||
|
|
#else
|
||
|
|
lcd_command(LCD_FUNCTION_DEFAULT); /* function set: display lines */
|
||
|
|
#endif
|
||
|
|
lcd_command(LCD_DISP_OFF); /* display off */
|
||
|
|
lcd_clrscr(); /* display clear */
|
||
|
|
lcd_command(LCD_MODE_DEFAULT); /* set entry mode */
|
||
|
|
lcd_command(dispAttr); /* display/cursor control */
|
||
|
|
|
||
|
|
}/* lcd_init */
|
||
|
|
|