Atmel CAVR-4 ユーザーズマニュアル

CAVR-4

Using a prebuilt library

Reference Guide

On the command line, you must specify the following items:

●

Specify which library object file to use on the XLINK command line, for instance:

dlavr-3s-ec-64-f.r90

●

Specify the include paths for the compiler and assembler:

-I avr\inc

●

Specify the library configuration file for the compiler:

--dlib_config C:\...\dlavr-3s-ec-64-f.h

You can find the library object files and the library configuration files in the subdirectory 

avr\lib\dlib

.

The prebuilt libraries delivered with the AVR IAR C/C++ Compiler can be used as is. 
However, it is possible to customize parts of a library without rebuilding it. There are 
two different methods:

●

Setting options for:

●

Formatters used by 

printf

 and 

scanf

●

The sizes of the heap and the stack

●

Overriding library modules with your own customized versions.

The following items can be customized: 

For a description about how to override library modules, see Overriding library 
modules, page 61.

Formatters for printf and scanf

Startup and termination code

Low-level input and output

File input and output

Low-level environment functions

Low-level signal functions

Low-level time functions

Size of heaps, stacks, and segments