I'm writing some I2C code for someone using the hardware MSSP on a 
18F242.

The following code works, but I'm not sure that it should.

Break should only short circuit a loop, in error I've coded it into an 
IF statement that is inside a while loop - so whilst Break works for a 
while loop, should it work when in an IF statement inside a loop?

Code below (note formatting may get mangled).

void I2C_hwStop()
{
     BYTE timeout = 50;
     
     SSPCON2 = SSPCON2 | (1<<PEN); // set stoP condition
     
     //In case the slave device gets stuck, we need to have a way of 
exiting.
     //otherwise we are stuck here until the plug is pulled!
     while (!(PIR1 & (1<<SSPIF)))
     {
           timeout --;
           if (timeout == 0)
            {
              break;
            }
     }
     
     PIR1 = PIR1 &~(1<<SSPIF);  //clear completed flag
}
//end I2C_hwStop

Thanks

Colin
--
cdb,  on 26/06/2009






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