SW006012 Microchip Technology, SW006012 Datasheet - Page 26

• Manufacturer Part Number: SW006012
• Description: C COMPILER FOR DSPIC30F FAMILY
• Manufacturer: Microchip Technology
• Type: MPLAB® C30 Compilerr
• Series: PIC24 & DsPICr

Specifications of SW006012

• Supported Families: PIC24, DsPIC30F And DsPIC33F
• Core Architecture: PIC, DsPIC
• Kit Contents: Software And Docs
• Mcu Supported Families: PIC24 MCUs And DsPIC DSCs
• Tool Type: Compiler
• Processor Series: PIC24, dsPIC
• Lead Free Status / RoHS Status: Not applicable / Not applicable
• For Use With/related Products: dsPIC30F
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

MPLAB
DS51284F-page 20
®
C30 User’s Guide
2.3.2
In MPLAB C30, you declare certain things about functions called in your program which
help the compiler optimize function calls and check your code more carefully.
The keyword __attribute__ allows you to specify special attributes when making a
declaration. This keyword is followed by an attribute specification inside double
parentheses. The following attributes are currently supported for functions:
• address (addr)
• alias ("target")
• auto_psv, no_auto_psv
• boot
• const
• deprecated
• far
• format (archetype, string-index, first-to-check)
• format_arg (string-index)
• interrupt [ ( [ save(list) ] [, irq(irqid) ] [, altirq(altirqid)] [,
• near
• no_instrument_function
• noload
• noreturn
• section ("section-name")
• secure
• shadow
• unused
• weak
You may also specify attributes with __ (double underscore) preceding and following
each keyword (e.g., __shadow__ instead of shadow). This allows you to use them in
header files without being concerned about a possible macro of the same name.
You can specify multiple attributes in a declaration by separating them by commas
within the double parentheses or by immediately following an attribute declaration with
another attribute declaration.
address (addr)
The address attribute specifies an absolute address for the function. This attribute
cannot be used in conjunction with a section attribute; the address attribute will take
precedence.
void foo()
...
}
alias ("target")
The alias attribute causes the declaration to be emitted as an alias for another symbol,
which must be specified.
Use of this attribute results in an external reference to target, which must be resolved
during the link phase.
preprologue(asm) ] ) ]
Specifying Attributes of Functions
__
attribute
__
((address(0x100))) {
© 2007 Microchip Technology Inc.