Hi,
kann mir jemand helfen die I2C adresse ins EEPROM zu schreiben.
Hier noch mein code:
#include <avr/io.h>
#include <avr/interrupt.h>
#include <avr/eeprom.h>
#include <inttypes.h>
#include "lcd.c"
#include "TWI_Slave.c"
#define F_CPU 8000000UL
// Sample TWI transmission commands
#define LCD_PUTC 0x50
#define LCD_GOTOXY 0x51
#define LCD_CLEAR 0x52
#define LCD_GOHOME 0x53
#define LCD_LIGHT 0x54
//#define EEMEM __attribute__ ((section (".eeprom")))
unsigned char TWI_Act_On_Failure_In_Last_Transmission ( unsigned char TWIerrorMsg )
{
PORTB = TWIerrorMsg;
TWI_Start_Transceiver();
return TWIerrorMsg;
}
void init_timer2 (void)
{
cli(); // Interrupts sperren!
ASSR &= ~(1<<AS2);
TCCR2 |= (1<<CS21) | (1<<CS22); //Timer 2 auf CLK/1024 setzen
OCR2 = 255; // Output Compare
TCNT2= 0x00; // Timer2 auf 0 stellen
TIMSK |= (1<<OCIE2) | (1<<TOIE2); // Timer2 Output Compare Interrupt Enable aktivieren (Bit setzen) //
sei(); // Interrrupts freigeben!
}
SIGNAL(SIG_OUTPUT_COMPARE2)
{
char cSREG;
cSREG = SREG; // Statusregister puffern in Variable cSREG //
PORTD &= ~(1<<4);
SREG = cSREG; // Statusregister aus Variable cSREG retten //
}
SIGNAL(SIG_OVERFLOW2)
{
char cSREG;
cSREG = SREG; // Statusregister puffern in Variable cSREG //
PORTD |= (1<<4);
SREG = cSREG; // Statusregister aus Variable cSREG retten //
}
int main( void )
{
unsigned char messageBuf[3];
unsigned char TWI_slaveAddress = 0x60 ;
uint32_t loop = 0;
//uint8_t eeFooByte = 0x01;
//uint8_t eeFooByte1 = 0x02;
// timer init
init_timer2();
DDRD = 0xFF; // Set to ouput
DDRB = 0x00; // Set to input
DDRC = 0x00; // Set to input
PORTB = 0xff; //activate pullup's
PORTC = 0xff; //activate pullup's
// Own TWI slave address
TWI_slaveAddress = 0x60; //eeprom_read_byte(&eeFooByte);
// Initialise TWI module for slave operation. Include address and/or enable General Call.
TWI_Slave_Initialise( TWI_slaveAddress);
sei();
// Start the TWI transceiver to enable reseption of the first command from the TWI Master.
TWI_Start_Transceiver();
//LCD_init
lcd_init(LCD_DISP_ON);
lcd_clrscr();
lcd_home();
lcd_puts("I2C_LCD by\nMartin Funk V1.1");
while (loop < 500000) loop++;
lcd_clrscr();
lcd_home();
lcd_puts("martin.roboter\nbastler.de V1.1");
loop = 0;
while (loop < 500000) loop++;
lcd_clrscr();
lcd_home();
OCR2 = 0;
// This loop runs forever. If the TWI is busy the execution will just continue doing other operations.
while(1)
{
// Check if the TWI Transceiver has completed an operation.
if ( ! TWI_Transceiver_Busy() )
{
// Check if the last operation was successful
if ( TWI_statusReg.lastTransOK )
{
// Check if the last operation was a reception
if ( TWI_statusReg.RxDataInBuf )
{
TWI_Get_Data_From_Transceiver(messageBuf ,3);
// Check if the last operation was a reception as General Call
if ( !TWI_statusReg.genAddressCall )
{
// Take action dependant on what slave address that was used in the message
//if (messageBuf[0] == TWI_slaveAddress)
// {
//clear Display
if (messageBuf[0] == LCD_CLEAR) //lcd löschen
{
lcd_clrscr();
}
if (messageBuf[0] == LCD_GOTOXY) //lcd gotoxy
{
lcd_gotoxy(messageBuf[1],messageBuf[2]);;
}
if (messageBuf[0] == LCD_PUTC) //lcd put char
{
lcd_putc(messageBuf[1]);
}
if (messageBuf[0] == LCD_GOHOME) //lcd put char
{
lcd_home();
}
if (messageBuf[0] == LCD_LIGHT) //lcd put char
{
OCR2 = messageBuf[1];
}
}
}
// Check if the TWI Transceiver has already been started.
// If not then restart it to prepare it for new receptions.
if ( ! TWI_Transceiver_Busy() )
{
TWI_Start_Transceiver();
}
}
// Ends up here if the last operation completed unsuccessfully
else
{
TWI_Act_On_Failure_In_Last_Transmission( TWI_Get_State_Info() );
}
}
}
}
Mfg Martin