removed garbage

This commit is contained in:
Steffen Vogel 2014-01-18 20:43:00 +01:00
parent 36fadfbb29
commit c61f70d778
4 changed files with 0 additions and 1031 deletions

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# Hey Emacs, this is a -*- makefile -*-
#----------------------------------------------------------------------------
# Makefile for the avr-gcc Toolchain
#
# by Steffen Vogel <post@steffenvogel.de>
#
#----------------------------------------------------------------------------
# Target Options
TARGET = main
OBJS = $(TARGET).o ds1820.o lcd.o
# Target
MCU = atmega16
F_CPU = 14745000
# Programming
AVRDUDE_FLAGS = -p m16 -c usbasp -P usb
HFUSE=
LFUSE=
DEFINES = -DF_CPU=$(F_CPU) -DBAUD=115200
WARNINGS = -Wall -Wextra
CPPFLAGS += -MD -MP
CXXFLAGS +=
CFLAGS += -g -O2 -mmcu=$(MCU) $(DEFINES) $(WARNINGS)
LDFLAGS += -Wl,-Map,$(TARGET).map -Wl,-u,vfprintf -lprintf_flt -lm
# Tools
AR = avr-ar
AS = avr-as
CC = avr-gcc
CXX = avr-g++
NM = avr-nm
OBJCOPY = avr-objcopy
OBJDUMP = avr-objdump
SIZE = avr-size
AVRDUDE = avrdude
# Dependencies
-include $(OBJS:.o=.d)
# Default Target
all: $(TARGET).hex $(TARGET).eep $(TARGET).lst
$(TARGET).elf: $(OBJS)
$(CC) $(CFLAGS) $(LDFLAGS) -o $@ $^
%.lst: %.elf
$(OBJDUMP) -h -S $< > $@
%.hex: %.elf
$(OBJCOPY) -j .text -j .data -O ihex $< $@
%.eep: %.elf
$(OBJCOPY) -j .eeprom --set-section-flags=.eeprom="alloc,load" --change-section-lma .eeprom=0 -O ihex $< $@
flash: $(TARGET).hex
$(AVRDUDE) $(AVRDUDE_FLAGS) -U flash:w:$(TARGET).hex
eeprom: $(TARGET).eep
$(AVRDUDE) $(AVRDUDE_FLAGS) -U eeprom:w:$(TARGET).eep
fuses:
$(AVRDUDE) $(AVRDUDE_FLAGS) -U hfuse:w:$(HFUSE):m -U lfuse:w:$(LFUSE):m
size: $(TARGET).elf
$(SIZE) -A $(TARGET).elf --format=avr --mcu $(MCU) | tail -n +5
$(NM) --print-size --size-sort --reverse-sort --radix=d main.elf --format=s | tail -n +5 | head -n 12
clean:
rm -f $(OBJS) $(OBJS:.o=.d)
rm -f $(TARGET).elf
rm -f $(TARGET).hex
rm -f $(TARGET).eep
rm -f $(TARGET).lst
rm -f $(TARGET).map
.PHONY: all size clean flash eeprom fuses

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/****************************************************************************
Title : HD44780U LCD library
Author: Peter Fleury <pfleury@gmx.ch> http://jump.to/fleury
File: $Id: lcd.c,v 1.14.2.1 2006/01/29 12:16:41 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 "lcd.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() __asm__ __volatile__( "rjmp 1f\n 1:" );
#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 0x24 /* |0|010|0100 4-bit mode extension-bit RE = 1 */
#define KS0073_EXTENDED_FUNCTION_REGISTER_OFF 0x20 /* |0|000|1001 4 lines mode */
#define KS0073_4LINES_MODE 0x09 /* |0|001|0000 4-bit mode, extension-bit RE = 0 */
#endif
#endif
/*
** function prototypes
*/
#if LCD_IO_MODE
static void toggle_e(void);
#endif
/*
** local functions
*/
//
//
//
///*************************************************************************
// delay loop for small accurate delays: 16-bit counter, 4 cycles/loop
//*************************************************************************/
//static inline void _delayFourCycles(unsigned int __count)
//{
// if ( __count == 0 )
// __asm__ __volatile__( "rjmp 1f\n 1:" ); // 2 cycles
// else
// __asm__ __volatile__ (
// "1: sbiw %0,1" "\n\t"
// "brne 1b" // 4 cycles/loop
// : "=w" (__count)
// : "0" (__count)
// );
//}
//
//
///*************************************************************************
//delay for a minimum of <us> microseconds
//the number of loops is calculated at compile-time from MCU clock frequency
//*************************************************************************/
//#define delay(us) _delayFourCycles( ( ( 1*(F_CPU/4000) )*us)/1000 )
#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();
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_us(2);
/* 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 */
void lcd_string(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 */
// setzt den Cursor in Zeile y (1..4) Spalte x (0..15)
void set_cursor(uint8_t x, uint8_t y)
{
uint8_t tmp;
switch (y)
{
case 1: tmp=0x80+0x00+x; break; // 1. Zeile
case 2: tmp=0x80+0x40+x; break; // 2. Zeile
case 3: tmp=0x80+0x14+x; break; // 3. Zeile (Angepasst auf 20 Spalten 0x14 statt 0x10)
case 4: tmp=0x80+0x54+x; break; // 4. Zeile (Angepasst auf 20 Spalten 0x54 statt 0x50)
default: return; // für den Fall einer falschen Zeile
}
lcd_command(tmp);
}
/*************************************************************************
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_ms(16); /* wait 16ms or more after power-on */
/* initial write to lcd is 8bit */
LCD_DATA1_PORT |= _BV(LCD_DATA1_PIN); // _BV(LCD_FUNCTION)>>4;
LCD_DATA0_PORT |= _BV(LCD_DATA0_PIN); // _BV(LCD_FUNCTION_8BIT)>>4;
lcd_e_toggle();
_delay_us(4992); /* delay, busy flag can't be checked here */
/* repeat last command */
lcd_e_toggle();
_delay_us(64); /* delay, busy flag can't be checked here */
/* repeat last command a third time */
lcd_e_toggle();
_delay_us(64); /* 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_us(64); /* 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(16000); /* wait 16ms after power-on */
lcd_write(LCD_FUNCTION_8BIT_1LINE,0); /* function set: 8bit interface */
delay(4992); /* wait 5ms */
lcd_write(LCD_FUNCTION_8BIT_1LINE,0); /* function set: 8bit interface */
delay(64); /* wait 64us */
lcd_write(LCD_FUNCTION_8BIT_1LINE,0); /* function set: 8bit interface */
delay(64); /* 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 */

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#ifndef LCD_H
#define LCD_H
/*************************************************************************
Title : C include file for the HD44780U LCD library (lcd.c)
Author: Peter Fleury <pfleury@gmx.ch> http://jump.to/fleury
File: $Id: lcd.h,v 1.13.2.2 2006/01/30 19:51:33 peter Exp $
Software: AVR-GCC 3.3
Hardware: any AVR device, memory mapped mode only for AT90S4414/8515/Mega
***************************************************************************/
/**
@defgroup pfleury_lcd LCD library
@code #include <lcd.h> @endcode
@brief 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.
@author Peter Fleury pfleury@gmx.ch http://jump.to/fleury
@see The chapter <a href="http://homepage.sunrise.ch/mysunrise/peterfleury/avr-lcd44780.html" target="_blank">Interfacing a HD44780 Based LCD to an AVR</a>
on my home page.
*/
/*@{*/
#if (__GNUC__ * 100 + __GNUC_MINOR__) < 303
#error "This library requires AVR-GCC 3.3 or later, update to newer AVR-GCC compiler !"
#endif
#include <inttypes.h>
#include <avr/io.h>
#include <avr/pgmspace.h>
#include "lcd.h"
#include "util/delay.h"
/**
* @name Definition for LCD controller type
* Use 0 for HD44780 controller, change to 1 for displays with KS0073 controller.
*/
#define LCD_CONTROLLER_KS0073 0 /**< Use 0 for HD44780 controller, 1 for KS0073 controller */
/**
* @name Definitions for Display Size
* Change these definitions to adapt setting to your display
*/
#define LCD_LINES 2 /**< number of visible lines of the display */
#define LCD_DISP_LENGTH 8 /**< visibles characters per line of the display */
#define LCD_LINE_LENGTH 0x40 /**< internal line length of the display */
#define LCD_START_LINE1 0x00 /**< DDRAM address of first char of line 1 */
#define LCD_START_LINE2 0x40 /**< DDRAM address of first char of line 2 */
#define LCD_START_LINE3 0x14 /**< DDRAM address of first char of line 3 */
#define LCD_START_LINE4 0x54 /**< DDRAM address of first char of line 4 */
#define LCD_WRAP_LINES 0 /**< 0: no wrap, 1: wrap at end of visibile line */
#define LCD_IO_MODE 1 /**< 0: memory mapped mode, 1: IO port mode */
#if LCD_IO_MODE
/**
* @name Definitions for 4-bit IO mode
* Change LCD_PORT if you want to use a different port for the LCD pins.
*
* The four LCD data lines and the three control lines RS, RW, E can be on the
* same port or on different ports.
* Change LCD_RS_PORT, LCD_RW_PORT, LCD_E_PORT if you want the control lines on
* different ports.
*
* Normally the four data lines should be mapped to bit 0..3 on one port, but it
* is possible to connect these data lines in different order or even on different
* ports by adapting the LCD_DATAx_PORT and LCD_DATAx_PIN definitions.
*
*/
#define LCD_PORT PORTC /**< port for the LCD lines */
#define LCD_DATA0_PORT LCD_PORT /**< port for 4bit data bit 0 */
#define LCD_DATA1_PORT LCD_PORT /**< port for 4bit data bit 1 */
#define LCD_DATA2_PORT LCD_PORT /**< port for 4bit data bit 2 */
#define LCD_DATA3_PORT LCD_PORT /**< port for 4bit data bit 3 */
#define LCD_DATA0_PIN 3 /**< pin for 4bit data bit 0 */
#define LCD_DATA1_PIN 4 /**< pin for 4bit data bit 1 */
#define LCD_DATA2_PIN 5 /**< pin for 4bit data bit 2 */
#define LCD_DATA3_PIN 6 /**< pin for 4bit data bit 3 */
#define LCD_RS_PORT LCD_PORT /**< port for RS line */
#define LCD_RS_PIN 0 /**< pin for RS line */
#define LCD_RW_PORT LCD_PORT /**< port for RW line */
#define LCD_RW_PIN 1 /**< pin for RW line */
#define LCD_E_PORT LCD_PORT /**< port for Enable line */
#define LCD_E_PIN 2 /**< pin for Enable line */
#elif defined(__AVR_AT90S4414__) || defined(__AVR_AT90S8515__) || defined(__AVR_ATmega64__) || \
defined(__AVR_ATmega8515__)|| defined(__AVR_ATmega103__) || defined(__AVR_ATmega128__) || \
defined(__AVR_ATmega161__) || defined(__AVR_ATmega162__)
/*
* memory mapped mode is only supported when the device has an external data memory interface
*/
#define LCD_IO_DATA 0xC000 /* A15=E=1, A14=RS=1 */
#define LCD_IO_FUNCTION 0x8000 /* A15=E=1, A14=RS=0 */
#define LCD_IO_READ 0x0100 /* A8 =R/W=1 (R/W: 1=Read, 0=Write */
#else
#error "external data memory interface not available for this device, use 4-bit IO port mode"
#endif
/**
* @name Definitions for LCD command instructions
* The constants define the various LCD controller instructions which can be passed to the
* function lcd_command(), see HD44780 data sheet for a complete description.
*/
/* instruction register bit positions, see HD44780U data sheet */
#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: 1=increment, 0=decrement */
#define LCD_ENTRY_SHIFT 0 /* DB2: 1=display shift on */
#define LCD_ON 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-> 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 */
#define LCD_BUSY 7 /* DB7: LCD is busy */
/* set entry mode: display shift on/off, dec/inc cursor move direction */
#define LCD_ENTRY_DEC 0x04 /* display shift off, dec cursor move dir */
#define LCD_ENTRY_DEC_SHIFT 0x05 /* display shift on, dec cursor move dir */
#define LCD_ENTRY_INC_ 0x06 /* display shift off, inc cursor move dir */
#define LCD_ENTRY_INC_SHIFT 0x07 /* display shift on, inc cursor move dir */
/* display on/off, cursor on/off, blinking char at cursor position */
#define LCD_DISP_OFF 0x08 /* display off */
#define LCD_DISP_ON 0x0C /* display on, cursor off */
#define LCD_DISP_ON_BLINK 0x0D /* display on, cursor off, blink char */
#define LCD_DISP_ON_CURSOR 0x0E /* display on, cursor on */
#define LCD_DISP_ON_CURSOR_BLINK 0x0F /* display on, cursor on, blink char */
/* move cursor/shift display */
#define LCD_MOVE_CURSOR_LEFT 0x10 /* move cursor left (decrement) */
#define LCD_MOVE_CURSOR_RIGHT 0x14 /* move cursor right (increment) */
#define LCD_MOVE_DISP_LEFT 0x18 /* shift display left */
#define LCD_MOVE_DISP_RIGHT 0x1C /* shift display right */
/* function set: set interface data length and number of display lines */
#define LCD_FUNCTION_4BIT_1LINE 0x20 /* 4-bit interface, single line, 5x7 dots */
#define LCD_FUNCTION_4BIT_2LINES 0x28 /* 4-bit interface, dual line, 5x7 dots */
#define LCD_FUNCTION_8BIT_1LINE 0x30 /* 8-bit interface, single line, 5x7 dots */
#define LCD_FUNCTION_8BIT_2LINES 0x38 /* 8-bit interface, dual line, 5x7 dots */
#define LCD_MODE_DEFAULT ((1<<LCD_ENTRY_MODE) | (1<<LCD_ENTRY_INC) )
/**
* @name Functions
*/
/**
@brief Initialize display and select type of cursor
@param dispAttr \b LCD_DISP_OFF display off\n
\b LCD_DISP_ON display on, cursor off\n
\b LCD_DISP_ON_CURSOR display on, cursor on\n
\b LCD_DISP_ON_CURSOR_BLINK display on, cursor on flashing
@return none
*/
extern void lcd_init(uint8_t dispAttr);
/**
@brief Clear display and set cursor to home position
@param void
@return none
*/
extern void lcd_clrscr(void);
/**
@brief Set cursor to home position
@param void
@return none
*/
extern void lcd_home(void);
/**
@brief Set cursor to specified position
@param x horizontal position\n (0: left most position)
@param y vertical position\n (0: first line)
@return none
*/
extern void lcd_gotoxy(uint8_t x, uint8_t y);
/**
@brief Display character at current cursor position
@param c character to be displayed
@return none
*/
extern void lcd_putc(char c);
/**
@brief Display string without auto linefeed
@param s string to be displayed
@return none
*/
extern void lcd_puts(const char *s);
extern void lcd_string(const char *s);
/**
@brief Display string from program memory without auto linefeed
@param s string from program memory be be displayed
@return none
@see lcd_puts_P
*/
extern void set_cursor(uint8_t x, uint8_t y);
extern void lcd_puts_p(const char *progmem_s);
/**
@brief Send LCD controller instruction command
@param cmd instruction to send to LCD controller, see HD44780 data sheet
@return none
*/
extern void lcd_command(uint8_t cmd);
/**
@brief Send data byte to LCD controller
Similar to lcd_putc(), but without interpreting LF
@param data byte to send to LCD controller, see HD44780 data sheet
@return none
*/
extern void lcd_data(uint8_t data);
/**
@brief macros for automatically storing string constant in program memory
*/
#define lcd_puts_P(__s) lcd_puts_p(PSTR(__s))
/*@}*/
#endif //LCD_H

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/**
* DS1820 test
*
* @author Steffen Vogel
* @copyright 2013 Institute for Man-Machine Interaction, RWTH Aachen
* @license http://www.gnu.org/licenses/gpl.txt GNU Public License
* @author Steffen Vogel <post@steffenvogel.de>
* @link http://www.mmi.rwth-aachen.de/?microcontrollerag
*/
/*
* This is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* any later version.
*/
#include <stdio.h>
#include "lcd.h"
#include "ds1820.h"
int main() {
float temp;
char buffer[16];
lcd_init(LCD_DISP_ON);
ds1820_init(PB2);
lcd_puts("DS1820\nReadout");
_delay_ms(1000);
lcd_clrscr();
for (;;) {
temp = ds1820_read_temp(PB2);
snprintf(buffer, sizeof(buffer), "%.2f ", temp);
lcd_home();
lcd_puts(buffer);
lcd_putc(0xdf);
lcd_putc('C');
_delay_ms(500);
}
return 0;
}