My .c function using your definition as:

unsigned char i2c_transmit(unsigned char address, unsigned char *transmit_bytes, unsigned char MAX_NUMBYTE_TX[])
{

  //extern unsigned char byte1, byte2;
  // if already busy then return current status
  if (i2cstatus & I2C_BUSY) return i2cstatus;

  // now we are busy performing a transfer
  i2cstatus = I2C_BUSYTX;

  // store slave address + W for use in ISR
  slaveaddress = address << 1;

  // transmit start condition
  STA = 1;

  // transmission started
  return I2C_OK;
}

 

Give me a warning:

I2C_MASTER.C(220): warning C280: 'transmit_bytes': unreferenced local variable
I2C_MASTER.C(220): warning C280: 'MAX_NUMBYTE_TX': unreferenced local variable

 

And that is really no big deal and correct since those two aren't being associated to pass parameters, so at this point, should I put a dummy equate to those two to shut the compiler up?

I tried to do as I just mentioned by:

unsigned char t1, t2;
t1=*transmit_bytes[0];
t2=MAX_NUMBYTE_TX[0];

 

And the compiler didn't like that at all.

Any suggestions to try to supress the known warning besides changing the warning level?