Atmel CAVR-4 Manual De Usuario

CAVR-4

Descriptions of pragma directives

Reference Guide

#pragma language

#pragma language={extended|default}

The 

#pragma

 

language

 directive is used for turning on the IAR language extensions 

or for using the language settings specified on the command line:

#pragma location

#pragma location=address

The 

#pragma

 

location

 directive specifies the location—the absolute address—of the 

variable whose declaration follows the pragma directive. For example:

#pragma location=0x2000

char PORT1; /* PORT1 is located at address 0x2000 */

The directive can also take a string specifying the segment placement for either a 
variable or a function, for example:

#pragma location="foo" 

For additional information and examples, see Located data, page 46.

#pragma message

#pragma message(message)

Makes the compiler print a message on 

stdout

 when the file is compiled. For example:

#ifdef TESTING

#pragma message("Testing")

#endif

#pragma object_attribute

#pragma object_attribute=keyword

The 

#pragma

 

object_attribute

 directive affects the definition of the identifier that 

follows immediately after the directive. The object is modified, not its type.

The following keyword can be used with 

#pragma

 

object_attribute

 for a variable:

The following keyword can be used with 

#pragma

 

object_attribute

 for a variable:

extended

Turns on the IAR language extensions and turns off the 

--strict_ansi

 command line option.

default

Uses the settings specified on the command line.

_ _no_init

Suppresses initialization of a variable at startup.

_ _monitor

Supports atomic execution of a function.