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Fungerande HD44780 kod som är lätt att ändra

https://elektronikforumet.com/forum/viewtopic.php?t=35735

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Fungerande HD44780 kod som är lätt att ändra

Postat: 17 juli 2009, 22:26:18
av Gildebrand
Hejsan!

Jag har byggt ett enkelt drivkort till en HD44780 display baserad på Tiny2313.

Hittade den här sidan: http://www.swharden.com/blog/2009-05-17 ... a-avr-gcc/

Koden såg väldigt fin ut med allt det invecklade i separata filer från "main-koden", men det vart väldigt mycket fel när jag provade att builda den.

Så nu undrar jag om nån av er sitter på nån fin kod för en HD44780 display, helst med en separat header-fil för att ställa in vilka portar som används.

Re: Fungerande HD44780 kod som är lätt att ändra

Postat: 17 juli 2009, 23:05:57
av sodjan
> men det vart väldigt mycket fel...

Hm, tanken föll dig inte in att visa (klippa in) *vilka* fel du fick ?

Det kanske bara är någon skit-nybörjar-miss. Min gissning är att
du inte förstog felen annars hade du väl talat om vad det var...

Det verkar lite onödigt att börja leta efter nya filer/koder bara
för att det råkade bli lite problem med den första. Varför skulle
någon annan fungera bättre ? Just för dig alltså ?

Re: Fungerande HD44780 kod som är lätt att ändra

Postat: 17 juli 2009, 23:11:40
av bearing
Procyon AVRlib

Re: Fungerande HD44780 kod som är lätt att ändra

Postat: 19 juli 2009, 00:56:09
av Gildebrand
Ber om ursäkt för att jag inte har svarat :oops: , har vart så mycket att göra på sistone.

Jag ska kolla felkoderna imorgon och så ska jag göra ett försök med AVRLib också så får jag återkomma med lite mera information

Re: Fungerande HD44780 kod som är lätt att ändra

Postat: 19 juli 2009, 20:43:40
av Gildebrand
Sådär nu kommer lite mera information.

jag börjar med de tre filerna som jag använder, lcd.c, lcd,h och main.c.

lcd.c

Kod: Markera allt

/****************************************************************************
 Title	:   HD44780U LCD library
 Author:    Peter Fleury <pfleury@gmx.ch>  http://jump.to/fleury
 File:	    $Id: lcd.c,v 1.13.2.2 2004/02/12 21:08:25 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
       
*****************************************************************************/

// extended by Martin Thomas 3/2004, removed bugs(?), added functions
// and maybe added new bugs
// 6/2005 - update to be compatible with avr-libc 1.2.3, mth

#include <inttypes.h>
#include <avr/io.h>
#include <avr/pgmspace.h>
#include "lcd.h"



/* 
** constants/macros 
*/
#define PIN(x) (*(&x - 2))  /* address of data direction register of port x */
#define DDR(x) (*(&x - 1))  /* address of input register of port x          */


#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


/* 
** 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*(XTAL/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
*************************************************************************/
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(10);	// mt was 4

    /* 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 ( 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 { 
		// mtmt added autoscroll
		#ifdef LCD_AUTO_SCROLL
		lcd_scrollup();
		lcd_waitbusy();
		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);
}


/*************************************************************************
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);
}

#ifdef LCD_SCROLL_FUNCTION
/*************************************************************************
Scroll up mtmt
*************************************************************************/
void lcd_scrollup(void)
{
	#if LCD_LINES==4
	uint8_t i,c;
	
	for (i=0;i<LCD_DISP_LENGTH;i++) {
		// line 2 to 1
		lcd_waitbusy();
		lcd_write((1<<LCD_DDRAM)+LCD_START_LINE2+i,0);
		lcd_waitbusy();
		c=lcd_read(1);
		lcd_waitbusy();
		lcd_write((1<<LCD_DDRAM)+LCD_START_LINE1+i,0);
		lcd_waitbusy();
		lcd_write(c, 1);
		// line 3 to 2
		lcd_waitbusy();
		lcd_write((1<<LCD_DDRAM)+LCD_START_LINE3+i,0);
		lcd_waitbusy();
		c=lcd_read(1);
		lcd_waitbusy();
		lcd_write((1<<LCD_DDRAM)+LCD_START_LINE2+i,0);
		lcd_waitbusy();
		lcd_write(c, 1);
		lcd_waitbusy();
		lcd_write((1<<LCD_DDRAM)+LCD_START_LINE4+i,0);
		lcd_waitbusy();
		c=lcd_read(1);
		lcd_waitbusy();
		lcd_write((1<<LCD_DDRAM)+LCD_START_LINE3+i,0);
		lcd_waitbusy();
		lcd_write(c, 1);
		lcd_waitbusy();
		lcd_write((1<<LCD_DDRAM)+LCD_START_LINE4+i,0);
		lcd_waitbusy();
		lcd_write(' ', 1);
	}
    #else
	#warning "Scroll up avail. only for 4-line displays"
	#endif	
}
#endif

/*************************************************************************
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
    {
		// mtmt changed order to fix autowrap first write to lcd then 
		// check position
		lcd_write(c, 1);
		pos = lcd_waitbusy();   // read busy-flag and address counter
#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 ) {
			// mtmt call to autoscroll
			#ifdef LCD_AUTO_SCROLL
			lcd_scrollup();
			lcd_waitbusy();
			lcd_write((1<<LCD_DDRAM)+LCD_START_LINE4,0);
			#else
			lcd_write((1<<LCD_DDRAM)+LCD_START_LINE1,0);
			#endif
		}
#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(16000);        /* 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(4992);         /* delay, busy flag can't be checked here */
   
    /* repeat last command */ 
    lcd_e_toggle();      
    delay(64);           /* delay, busy flag can't be checked here */
    
    /* repeat last command a third time */
    lcd_e_toggle();      
    delay(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(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
    lcd_command(LCD_FUNCTION_DEFAULT);      /* function set: display lines  */
    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 */
main.c

Kod: Markera allt

// THIS THE TEST PROGRAM "main.c"
// ATTiny2313 / HD44780 LCD INTERFACE
#include <stdlib.h>
#include <avr/io.h>
#include <util/delay.h>
#include "lcd.h"
#include "lcd.c"

int main(void)
{
    int i=0;
    lcd_init(LCD_DISP_ON);
    lcd_clrscr();
    lcd_puts("ATTiny 2313 LCD Demon");
    lcd_puts("  www.SWHarden.com  n");
    _delay_ms(1000);
    lcd_clrscr();
    for (;;) {
        lcd_putc(i);
        i++;
        _delay_ms(50);
    }
}
lcd.h

Kod: Markera allt

#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 1.12.2.2 2004/02/12 21:05:59 peter Exp $
 Software:  AVR-GCC 3.3
 Hardware:  any AVR device, memory mapped mode only for AT90S4414/8515/Mega
***************************************************************************/
// extended by Martin Thomas 3/2004, removed bugs(?), added functions
// and maybe added new bugs

/**
 @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/pfleury/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/pgmspace.h>

/** 
 *  @name  Definitions for MCU Clock Frequency
 *  Adapt the MCU clock frequency in Hz to your target. 
 */
//#define XTAL 4000000              /**< clock frequency in Hz, used to calculate delay timer */
// mtmt:
#define XTAL 3700000              /**< clock frequency in Hz, used to calculate delay timer */

/** 
 *  @name  Definitions for Display Size 
 *  Change these definitions to adapt setting to your display
 */
#define LCD_LINES           4     /**< number of visible lines of the display */
#define LCD_DISP_LENGTH    20     /**< visibles characters per line of the display */
#define LCD_LINE_LENGTH  0x10     /**< internal line length of the display    */

// mtmt for reichelt 16*4 Dispaytech 164A
#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  0x10     /**< DDRAM address of first char of line 3 */
#define LCD_START_LINE4  0x50     /**< DDRAM address of first char of line 4 */

#define LCD_WRAP_LINES      1     /**< 0: no wrap, 1: wrap at end of visibile line */

// mtmt Scroll and autoscroll added 
#define LCD_SCROLL_FUNCTION 1     /**< include scroll-up function */
#define LCD_AUTO_SCROLL 1         /**< auto-scroll on fullscreen only in combination with LCD_SCROLL_FUNCTION  */

#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.
 *  
 */
 // mtmt changed to test-hardware
#define LCD_PORT         PORT        /**< port for the LCD lines   */
#define LCD_PORTD		 PORTD
#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    4            /**< pin for 4bit data bit 0  */
#define LCD_DATA1_PIN    5            /**< pin for 4bit data bit 1  */
#define LCD_DATA2_PIN    6            /**< pin for 4bit data bit 2  */
#define LCD_DATA3_PIN    7            /**< pin for 4bit data bit 3  */
#define LCD_RS_PORT      LCD_PORTD     /**< port for RS line         */
#define LCD_RS_PIN       0            /**< pin  for RS line         */
#define LCD_RW_PORT      LCD_PORTD     /**< port for RW line         */
#define LCD_RW_PIN       1            /**< pin  for RW line         */
#define LCD_E_PORT       LCD_PORTD     /**< port for Enable line     */
#define LCD_E_PIN        6            /**< 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);


/**
 @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 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);

// mtmt new function:
#ifdef LCD_SCROLL_FUNCTION
/**
 @brief    Scroll LCD up
 @param    none
 @return   none
*/
extern void lcd_scrollup(void);
#endif

// mtmt exported for debugging
extern uint8_t lcd_waitbusy(void);

/**
 @brief macros for automatically storing string constant in program memory
*/
#define lcd_puts_P(__s)         lcd_puts_p(PSTR(__s))


/*@}*/
#endif //LCD_H
Jag har lagt till dessa tre filer i mitt avr-gcc projekt (i AVR-studio 4).
När jag försöker bygga så får jag följande fel
c:/winavr-20090313/lib/gcc/../../avr/include/util/delay.h:85:3: warning: #warning "F_CPU not defined for <util/delay.h>"
../MAIN.c:6:17: error: lcd.h: No such file or directory
../MAIN.c:7:17: error: lcd.c: No such file or directory
../MAIN.c: In function 'main':
../MAIN.c:12: warning: implicit declaration of function 'lcd_init'
../MAIN.c:12: error: 'LCD_DISP_ON' undeclared (first use in this function)
../MAIN.c:12: error: (Each undeclared identifier is reported only once
../MAIN.c:12: error: for each function it appears in.)
../MAIN.c:13: warning: implicit declaration of function 'lcd_clrscr'
../MAIN.c:14: warning: implicit declaration of function 'lcd_puts'
../MAIN.c:19: warning: implicit declaration of function 'lcd_putc'
make: *** [MAIN.o] Error 1
Build failed with 5 errors and 5 warnings...
varför hittar den inte lcd.h och lcd.c, måste de ligga i samma mapp i datorn? Det borde väl räcka att man lagt till de i projektet.

Jag tänker mig att resten av problemen är pga att den inte hittar de två filerna, eftersom det är där funktionerna ligger.

Re: Fungerande HD44780 kod som är lätt att ändra

Postat: 19 juli 2009, 22:49:37
av vfr
Inkluderingsfiler angivna med "" skall ligga i samma mapp, enligt C-standard. Det finns ju ingenting som säger att du har ett "projekt" att att ange filpathar i. Nu råkar du ha det här, men C-standarden bygger inte på att du måste ha det. Utan där definieras att det ska vara i samma mapp.

Och antagandet att de övriga felen är följdfel, ser korrekt ut. Iallafall vid en snabb titt.

Du tycker inte att den här tråden hade platsat bättre i mikroprocessoravdelningen eller i optoavdelningen? Det tycker iallafall jag.

Re: Fungerande HD44780 kod som är lätt att ändra

Postat: 19 juli 2009, 22:57:33
av Gildebrand
Någon moderator får gärna flytta.

Det löste sig när jag la filerna i samma mapp, nu uppstod följande fel istället:
c:/winavr-20090313/lib/gcc/../../avr/include/util/delay.h:85:3: warning: #warning "F_CPU not defined for <util/delay.h>"
In file included from ../MAIN.c:7:
../lcd.c: In function 'lcd_write':
../lcd.c:138: error: 'PORT' undeclared (first use in this function)
../lcd.c:138: error: (Each undeclared identifier is reported only once
../lcd.c:138: error: for each function it appears in.)
../lcd.c: In function 'lcd_read':
../lcd.c:218: error: 'PORT' undeclared (first use in this function)
../lcd.c: In function 'lcd_init':
../lcd.c:557: error: 'PORT' undeclared (first use in this function)
make: *** [MAIN.o] Error 1
Build failed with 5 errors and 1 warnings...

Re: Fungerande HD44780 kod som är lätt att ändra

Postat: 19 juli 2009, 23:06:49
av eqlazer
Du måste ju kolla upp vad som står på raden som får error och då det är makron i detta fallet så är det bara att spåra tillbaka.

Kolla upp
#define LCD_DATA0_PORT LCD_PORT
och
#define LCD_PORT PORT
i lcd.h, du har ju glömt att konfigurera upp vilken port/pinnar som displayen är ansluten till.

Re: Fungerande HD44780 kod som är lätt att ändra

Postat: 19 juli 2009, 23:27:13
av Gildebrand
Åh, vad klantigt av mig :wall:

Jag hade ändrat lite för mycket i lcd.h och missat att jag inte definierat LCD_PORT.

Nu är det ett fel och en varning kvar.

står bara
make: *** [SWHARDEN.elf] Error 1
Hur tolkar man det?

Re: Fungerande HD44780 kod som är lätt att ändra

Postat: 19 juli 2009, 23:37:04
av vfr
Vad säger dokumentationen till utvecklingsverktygen om "Error 1"?

ELF-filen låter som resultatfilen av länkningen. Är namnet "SWHARDEN" något du känner igen?

Re: Fungerande HD44780 kod som är lätt att ändra

Postat: 19 juli 2009, 23:39:38
av Gildebrand
jag tror jag döpte projektet till det eftersom det var namnet på sidan där jag hämtade allt ifrån.

Re: Fungerande HD44780 kod som är lätt att ändra

Postat: 20 juli 2009, 00:42:51
av Gildebrand
Det stod lite mer om det under "message"
gcc plug-in: Error: Object file not found on expected location H:\default\SWHARDEN.elf

Re: Fungerande HD44780 kod som är lätt att ändra

Postat: 20 juli 2009, 07:56:41
av linlun
Det ser ut som att du har inkluderat "lcd.c" Det ska man inte göra, enbart *.h-filer ska inkluderas.
/Linus

Re: Fungerande HD44780 kod som är lätt att ändra

Postat: 20 juli 2009, 08:24:38
av bearing
Vilket förutsätter att .c-filen finns med i Make-filen, eller har kompilerats tidigare.

Re: Fungerande HD44780 kod som är lätt att ändra

Postat: 20 juli 2009, 11:44:31
av Gildebrand
Linus: Nu lyckades jag bygga den när jag gjorde så.

Då återstår att lista ut vad som är fel, för den vill inte skriva ut någon text på displayen, det syns bara två rader med fyrkanter, vilket jag förstått betyder att den har initierats, men har inget som helst med AVRen att göra.
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