How to setup communication between I2C/TWI and EEPROM

[SANDEEP RAVAL]

Hi Friends,

 

I have a query that i am doing my programs on I2C/TWI with EEPROM.

 

I am unable to set communication with my EEPROM and I am not getting the acknowledgement signal.

 

Furthermore,I am not understanding the instruction in the link seen below.

 

Plz.reply me with clean explaination that TWI acknowledgement.

 

http://www.engineersgarage.com/embedded/avr-microcontroller-projects/atmega32-twi-two-wire-interface

void TWI_start(void)
{
    // Clear TWI interrupt flag, Put start condition on SDA, Enable TWI
    TWCR= (1<<TWINT)|(1<<TWSTA)|(1<<TWEN);    
    while(!(TWCR & (1<<TWINT))); // Wait till start condition is transmitted
    while((TWSR & 0xF8)!= 0x08); // Check for the acknowledgement
}

[dagakshay]

which EEPROM u using is it at24c02???

 

have went thorugh the links:

 

http://www.engineersgarage.com/tutorials/twi-i2c-interface

 

 

http://www.engineersgarage.com/tutorials/avr-atmega32-twi-registers 

 

which part you got sturct i mean where you not getting acknoledgement in sending start condition or sending address??

[SANDEEP RAVAL]

Hi dear,

I am using ATMEGA32 microcontroller and EEPROM 24C16.

I am getting acknowledgwment in sending start condition & sending address both.

when i studied following istruction i could not understand it means how will my EEPROM recieve or send an acknowledgement to my ATMEGA32.:

plz help.

u r my last hope.

---

void TWI_start(void)
{
// Clear TWI interrupt flag, Put start condition on SDA, Enable TWI
        TWCR= (1<<TWINT)|(1<<TWSTA)|(1<<TWEN);

while(!(TWCR & (1<<TWINT))); // Wait till start condition is transmitted

while((TWSR & 0xF8)!= 0x08); // Check for the acknowledgement
}

 

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