I put a spy function. I transmmit to serial each status.

#define AT24C256 0x50 // (0101 0000)
#define I2CINIT 0x7F
static unsigned char i2cVector[30];
unsigned int IndexRx;
unsigned int IndexTx;

void main(void)
{
  uart_init();
  i2c_init(I2CINIT, 0);
  EA=1;
  uart_transmit(i2c_getstatus());
  IndexTx=3;    // number of bytes to transmit
  i2cVector[0]=0x00;   // MSB
  i2cVector[1]=0x00;   // LSB
  i2cVector[2]=0xA5;   // data to write
  i2c_transmit(AT24C256);
  uart_transmit(i2c_getstatus());
  while (i2c_getstatus() & I2C_BUSY);
  uart_transmit(i2c_getstatus());
  i2c_transfer_finished();  
  uart_transmit(i2c_getstatus());
  while(1);
}

I receive 0x00 (IDLE) and 0x03 (I2C_BUSYTX). Only these. Why ?

Jorge