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/*****************************************************
Project : I2C Example program
Version : 1.0
Date : 2/21/2005
Author : Wildani Mufadhol
Company : Pens-ITS
Chip type : ATMega16
Program type : Application
Clock frequency : 4.0000 MHz
Memory model : Small
External SRAM size : 0
Data Stack size : 128
*****************************************************/
#include
#include
#include
#include
#asm
.equ __i2c_port=0x18 ;PORTB //setting bit i2c
.equ __sda_bit=7
.equ __scl_bit=6
#endasm
#define EEPROM_ADDR 0xA0 //alamat eeprom (lihat datasheet)
//jumlah alamat tergantung ic (lihat datasheet)
unsigned char data;
i2c_start();
i2c_write(EEPROM_ADDR);
i2c_write(alamat);
i2c_start();
i2c_write(EEPROM_ADDR | 1);
data = i2c_read(0);
i2c_stop();
return data;
}
void write_EEPROM(unsigned char alamat, unsigned char nilai){
i2c_start();
i2c_write(EEPROM_ADDR);
i2c_write(alamat);
i2c_write(nilai);
i2c_stop();
delay_ms(10);
}
void main(void){
PORTA=0x00;
DDRA=0xff;
unsigned char i;
// USART initialization
// Communication Parameters: 8 Data, 1 Stop, No Parity
// USART Receiver: On
// USART Transmitter: On
// USART Mode: Asynchronous
// USART Baud rate: 9600
UCSRA=0x00;
UCSRB=0x18;
UCSRC=0x86;
UBRRH=0x00;
UBRRL=0x4D;
i2c_init();
write_EEPROM(0x00,0x00);
i=read_EEPROM(0x00);
while (1){
PORTA=i;
}
}
Project : I2C Example program
Version : 1.0
Date : 2/21/2005
Author : Wildani Mufadhol
Company : Pens-ITS
Chip type : ATMega16
Program type : Application
Clock frequency : 4.0000 MHz
Memory model : Small
External SRAM size : 0
Data Stack size : 128
*****************************************************/
#include
#include
#include
#include
#asm
.equ __i2c_port=0x18 ;PORTB //setting bit i2c
.equ __sda_bit=7
.equ __scl_bit=6
#endasm
#define EEPROM_ADDR 0xA0 //alamat eeprom (lihat datasheet)
//jumlah alamat tergantung ic (lihat datasheet)
unsigned char data;
i2c_start();
i2c_write(EEPROM_ADDR);
i2c_write(alamat);
i2c_start();
i2c_write(EEPROM_ADDR | 1);
data = i2c_read(0);
i2c_stop();
return data;
}
void write_EEPROM(unsigned char alamat, unsigned char nilai){
i2c_start();
i2c_write(EEPROM_ADDR);
i2c_write(alamat);
i2c_write(nilai);
i2c_stop();
delay_ms(10);
}
void main(void){
PORTA=0x00;
DDRA=0xff;
unsigned char i;
// USART initialization
// Communication Parameters: 8 Data, 1 Stop, No Parity
// USART Receiver: On
// USART Transmitter: On
// USART Mode: Asynchronous
// USART Baud rate: 9600
UCSRA=0x00;
UCSRB=0x18;
UCSRC=0x86;
UBRRH=0x00;
UBRRL=0x4D;
i2c_init();
write_EEPROM(0x00,0x00);
i=read_EEPROM(0x00);
while (1){
PORTA=i;
}
}
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