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Jacob2
03.05.2011, 21:05
Ich verwende am ATmega48 einen PWM-Kanal (OC0A an PD6) doch sobald ich in der Software die LCD-Library von P. Fleury verwende, funktioniert dieser Pin nicht mehr richtig, d.h. das PWM-Signal ist nichtmehr vorhanden. Am Oszilloskop sieht man nur ein Rechtecksignal bei um die 0,2V, was aber von der Form her scheinbar nichts mit dem PWM-Signal zu tun hat.

Eigentlich dürfte dieser Pin PD6 nicht für das LCD verwendet werden, denn der entsprechende Abschnitt in lcd.h sieht so aus:



#define LCD_PORT PORTB /**< port for the LCD lines */
#define LCD_DATA0_PORT PORTB /**< port for 4bit data bit 0 */
#define LCD_DATA1_PORT PORTB /**< port for 4bit data bit 1 */
#define LCD_DATA2_PORT PORTD /**< port for 4bit data bit 2 */
#define LCD_DATA3_PORT PORTC /**< port for 4bit data bit 3 */
#define LCD_DATA0_PIN 7 /**< pin for 4bit data bit 0 */
#define LCD_DATA1_PIN 6 /**< pin for 4bit data bit 1 */
#define LCD_DATA2_PIN 7 /**< pin for 4bit data bit 2 */
#define LCD_DATA3_PIN 3 /**< pin for 4bit data bit 3 */
#define LCD_RS_PORT PORTB /**< port for RS line */
#define LCD_RS_PIN 4 /**< pin for RS line */
#define LCD_RW_PORT PORTB /**< port for RW line */
#define LCD_RW_PIN 5 /**< pin for RW line */
#define LCD_E_PORT PORTB /**< port for Enable line */
#define LCD_E_PIN 0 /**< pin for Enable line */Ich schreib nochmal meinen Code dazu, falls der relevant ist:

#include <avr/io.h>
#include "lcdlibrary/lcd.h"
#include <util/delay.h>

#define SAUGER_PORT PORTD
#define SAUGER_PIN PD6

void Sauger(int Geschwindigkeit)
{
OCR0A = Geschwindigkeit;
};
void PWM_Init (void)
{
DDRD |= (1<<PD6);
//Fast-PWM-Mode, Clear on CompareMatch, Set on Bottom, Clk/8
TCCR0A |= (1<<COM0A1) | (1<<WGM00) | (1<<WGM01);
TCCR0A &= ~(1<<COM0A0);
TCCR0B |= (1<<CS01);
TCCR0B &= ~((1<<WGM02) | (1<<FOC0A) | (1<<FOC0B) | (1<<CS00) | (1<<CS02));

//Compare-Wert
OCR0A = 0x0;
};
void Init (void)
{
lcd_init(LCD_DISP_ON);
lcd_clrscr();
PWM_Init();
};

int main (void)
{
Init();
lcd_puts("Staubsaugerroboter");
Sauger(128);
while (1)
{
}
};Sobald ich aus obigem Code lcd_init(), lcd_clrscr() und lcd_puts() herausnehme, ist das PWM-Signal wieder richtig da.
Kann mir da jemand auf die Sprünge helfen?

radbruch
04.05.2011, 00:15
Die P. Fleury-Lib verwende ich nicht. Was steht denn in lcd_init(), lcd_clrscr() und lcd_puts()? Vielleicht fummeln diese Funktionen an dem DDR des PD6.

Jacob2
04.05.2011, 08:11
Hier einfach mal die lcd.c (die Funktionen hab ich markiert):

/************************************************** **************************
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 <inttypes.h>
#include <avr/io.h>
#include <avr/pgmspace.h>
#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*(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
************************************************** ***********************/
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(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 */


/************************************************** ***********************
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

#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 */
Aber eigentlich werden da überall nur die in lcd.h vordefinierten Ports und Pins benutzt, d.h. an PD6 dürfte eigentlich nichts geändert werden...

drew
06.05.2011, 20:26
Hallo,
den Code hab ich mir nicht genau durchgeschaut. Vielleicht kannst Du das Problem etwas einschränken, wenn Du mit den Ports rum spielst. Leg z.B. mal den LCD_DATA2_PORT auf PORTC. (Dann geht halt das Display nicht mehr.)
Reicht schon die lcd_init(), damit der PWM nicht mehr geht? Oder ist das Problem erst da, wenn alle 3 Funktionen dastehen? Dann könntest Du mal geziehlt die lcd_init() anschauen. (und anpassen)

Viel Erfolg,
Drew

Jacob2
07.05.2011, 15:05
Ich habe schon versucht, wie von drew vorgeschlagen, den PORTD in lcd.h vollständig herauszuhalten, was aber leider nichts gebracht hat. Es reicht schon lcd_init() um das PWM-Signal zu stören.

Das einzig "verdächtige" in lcd_init() scheint mir folgendes sein zu können:

/* enable external SRAM (memory mapped lcd) and one wait state */
MCUCR = _BV(SRE) | _BV(SRW);Ich weiß aber nicht, ob das auf die PWM Einfluss nehmen könnte...

Das, was ich an PD6 (dort wo eigentlich das PWM-Signal anliegen sollte) messe, sieht übrigens so aus:

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