CCS C Compiler Manual PCB / PCM / PCH

Data Definitions
Type Qualifiers
Type-Qualifier
static
auto
double
extern
register
_ fixed(n)
unsigned
signed
volatile
const
rom
void
readonly
bif
attribute__
Variable is globally active and initialized to 0. Only accessible from this
compilation unit.
Variable exists only while the procedure is active. This is the default and
AUTO need not be used.
Is a reserved word but is not a supported data type.
External variable used with multiple compilation units. No storage is
allocated. Is used to make otherwise out of scope data accessible. there
must be a non-extern definition at the global level in some compilation
unit.
Is allowed as a qualifier however, has no effect.
Creates a fixed point decimal number where n is how many decimal
places to implement.
Data is always positive. This is the default data type if not specified.
Data can be negative or positive.
Tells the compiler optimizer that this variable can be changed at any point
during execution.
Data is read-only. Depending on compiler configuration, this qualifier
may just make the data read-only -AND/OR- it may place the data into
program memory to save space. (see #DEVICE const=)
Forces data into program memory. Pointers may be used to this data but
they can not be mixed with RAM pointers.
Built-in basic type. Type void is used to indicate no specific type in places
where a type is required.
Writes to this variable should be dis-allowed
Used for compiler built in function prototypes on the same line
Sets various attributes
SEE ALSO: Declarations, Type Specifiers, Enumerated Types, Structures & Unions, typedef,
Named Registers
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