CCS C Compiler Manual PCB / PCM / PCH

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__address__
A predefined symbol __address__ may be used to indicate a
type that must hold a program memory address.
For example:
___address__ testa = 0x1000 //will allocate 16 bits for test a
and
//initialize to 0x1000
_attribute_x
Syntax:
Elements:
__attribute__x
x is the attribute you want to apply. Valid values for x are as follows:
((packed))
By default each element in a struct or union are padded to be evenly
spaced by the size of 'int'. This is to prevent an address fault when
accessing an element of struct. See the following example:
struct
{
int8 a;
int16 b;
} test;
On architectures where 'int' is 16bit (such as dsPIC or PIC24
PICmicrocontrollers), 'test' would take 4 bytes even though it is
comprised of3 bytes. By applying the 'packed' attribute to this struct
then it would take 3 bytes as originally intended:
struct __attribute__((packed))
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