Atmel CAVR-4 Manual De Usuario

CAVR-4

Using a prebuilt library

Reference Guide

You can make the library provide different levels of debugging support—basic, runtime, 
and I/O debugging.

The following table describes the different levels of debugging support:

If you build your application project with the XLINK options With runtime control 
modules or With I/O emulation modules, certain functions in the library will be 
replaced by functions that communicate with the IAR C-SPY Debugger. For further 
information, see C-SPY Debugger runtime interface, page 76. 

To set linker options for debug support in IAR Embedded Workbench, choose 
Project>Options and select the Linker category. On the Output page, select the 
appropriate Format option.

The prebuilt runtime libraries are configured for different combinations of the following 
features:

●

Type of library

●

Processor option (

-v

)

●

Memory model option (

--memory_model

)

●

AVR enhanced core option (

--enhanced_core

)

Basic debugging

Debug information for 

C-SPY

-Fubrof

Debug support for C-SPY 

without any runtime support

Runtime debugging With runtime control 

modules

-r

The same as -Fubrof, but 

also includes debugger 

support for handling program 

abort, exit, and assertions.

I/O debugging

With I/O emulation 

modules

-rt

The same as -r, but also 

includes debugger support for 

I/O handling, which means 

that stdin and stdout are 

redirected to the C-SPY 

Terminal I/O window, and that 

it is possible to access files on 

the host computer during 

debugging.