> -----Original Message-----
> From: piclist-bounces@mit.edu 
> [mailto:piclist-bounces@mit.edu] On Behalf Of Andre Abelian
> Sent: Saturday, May 28, 2005 2:14 PM
> To: 'Microcontroller discussion list - Public.'
> Subject: RE: [EE]: XORing output_bit in CCS c
> 
> 
> 
> Rob,
> 
> I just downloaded the manual and looked at page 23-24 where 
> #bit and #byte are I do not see any thing talking about xor 
> What page are you looking at?
> 
> Andre
> 
> 

Not sure what you think you read because page 23 and 24 of the manual
concerns the CCS debugger.

#bit is covered on page 34 and #byte is on page 35.


Did you look at the example code they specify?  Did you read the entire
description of #byte and #bit because it makes it pretty clear this is a
method for direct access to bytes and bits in the PIC's register file
map.




// assuming PIC16F877A, change address to suit your application
#byte PORTA = 0x05
#bit PA0 = PORTA.0

// later in the code

PA0 = 1;  // set output bit (assuming TRIS register set correctly)
PA0 = 0;  // clear output bit (assuming TRIS register set correctly)
PA0 ^= 1; // toggle bit (assuming TRIS register set correctly)

// if TRIS set for input then this is possible

if (PA0) 
{
   // do something because PA0 read back as 1
}

switchstate = PA0;

Rob
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