how to program use OpenCores I2C Master core in n2

int32_t aic12_read_reg(uint8_t reg,uint8_t *data,uint8_t count)

{

uint32_t i;

int32_t err=0;

uint8_t status=0;

uint8_t devadd=0x40;

*data=0;

// first init register index

err=i2c_write_byte(CR_STA,(devadd<<1)|I2C_WR,&status);

if(err) return -1;

err=i2c_write_byte(CR_STO,reg,&status);

if(err) return -1;

// now read register index

err=i2c_write_byte(CR_STA,(devadd<<1)|I2C_RD,&status);

if(err) return -1;

for(i=0;i<count-1;i++)

{

err=i2c_read_byte(0,data,&status); // CR_NACK = BIT3 = 0 --> ack is sent

if(err) return -1;

data++;

}

// create stop signal, no ack

err=i2c_read_byte(CR_STO | CR_NACK ,data,&status);

return err;

}

this is sample code (device specific) to read from a codec device

(see your device datasheet), you have to give the correct

ctrl value to the read function,

the read is done in the "for loop", the last read is done with

"CR_STO | CR_NACK"

if BIT 3 = CR_NACK is set, no acknoledge is sent

good luck