i2c interfacing code in microC

[sudheepsrc]

plz help me,,,,,,,,,,


void main(){
PORTB = 0;
TRISB = 0;

I2C_Init(100000);
I2C_Start(); // Issue I2C start signal
I2C_Wr(0xA2); // Send byte via I2C (command to 24cO2)
I2C_Wr(2); // Send byte (address of EEPROM location)
I2C_Wr(0xF0); // Send data (data to be written)
I2C_Stop();

Delay_ms(100);

I2C_Start(); // Issue I2C start signal
I2C_Wr(0xA2); // Send byte via I2C (device address + W)
I2C_Wr(2); // Send byte (data address)
I2C_Repeated_Start(); // Issue I2C signal repeated start
I2C_Wr(0xA3); // Send byte (device address + R)
PORTB = I2C_Rd(0u); // Read the data (NO acknowledge)
I2C_Stop();
}

plz explain this code and address+W and address+R

 

[piyush manavar]

Please explain your exact Probleam


Regards
Piyush Manavar

 

[malik_zohaib]

basically this code is the example in mikroc; if you see your controller is connecterd to 24c02 eeprom.
now; i2c_int(100000) Initializes I²C with desired clock that is 100khz in this case.
I2C_Start(); Determines if I²C bus is free and issues START signal.
I2C_Wr(0xA2); Sends data byte (parameter data) via I²C bus. now you have to set parameter, as in this code data is written at address 2 and A(1010) is the control code (please refer to eeprom datasheet) so 'address+W' is gives A2; as writing data.
"I2C_Wr(0xF0) it cant be F"
the below code portion is same except I2C_Wr(0xA3) now you are reading data,