Atmel Evaluation Board using the SAM7SE Microcontroller AT91SAM7SE-EK AT91SAM7SE-EK Data Sheet

6295A–ATARM–27-Mar-07

To generate the binary file to be downloaded into the target, we use the YAGARTO GNU ARM
compiler toolchain (

This toolchain provides ARM assembler, compiler, and linker tools. Useful programs for debug
are also included.

We also require another software that is not included into the Yagarto package: the make utility.
We get it by installing the unxutils package available at 

.

The Makefile contains rules indicating how to assemble, compile and link the project source files
to create a binary file ready to be downloaded on the target.

The makefile is divided into two parts, one for variables settings, and the other for rules
implementation.

The first part of the Makefile contains variables (uppercase), used to set up some environment
parameters, such as the compiler toolchain prefix and program names, and options to be used
with the compiler.

CROSS_COMPILE=arm-elf-

• Defines the cross-compiler toolchain prefix.

OUTFILE_SDRAM=at91sam7se_getting_started_sdram

OUTFILE_FLASH=at91sam7se_getting_started_flash

• Outfile name (without extension).

INCL=./../include

• Paths for header files.

OPTIM = -Os

• Level of optimization used during compilation (-Os optimizes for size).

AS=$(CROSS_COMPILE)gcc

CC=$(CROSS_COMPILE)gcc

LD=$(CROSS_COMPILE)gcc

NM= $(CROSS_COMPILE)nm

SIZE=$(CROSS_COMPILE)size

OBJCOPY=$(CROSS_COMPILE)objcopy

OBJDUMP=$(CROSS_COMPILE)objdump

• Names of cross-compiler toolchain binutils (assembler, compiler, linker, symbol list extractor, 

etc.).

$(OPTIM)CCFLAGS=-g -mcpu=arm7tdmi $(OPTIM) -Wall -I$(INCL)