Compiler optimisation for due board

pert · April 26, 2018, 9:50am

They stopped bundling the hardware package for the Due (Arduino SAM Boards) in recent versions of the Arduino IDE but it's quite easy to install it:

Tools > Board > Boards Manager
Wait for downloads to finish.
Click on "Arduino SAM Boards".
Click "Install".
Wait for installation to finish.
Click "Close".

There has been a lot of development on the Arduino IDE since 1.5.7 so you might find it useful to update but the choice is yours of course.

As for the compiler options. These are set in the file platform.txt. Each hardware package has its own platform.txt so you will notice there is one for Arduino AVR Boards and another for Arduino SAM Boards. In your Arduino IDE 1.5.7 installation you will find the Arduino SAM Boards platform.txt at {Arduino IDE instatallation folder}/hardware/arduino/sam/platform.txt.

To make changes to the flags you can edit that file directly. The Arduino IDE only scans platform.txt on startup so you need to close all Arduino IDE windows and then start the IDE again before changes you make to platform.txt will take effect.

There are also some options to add custom compilation flags without editing platform.txt.

You can create a file named platform.local.txt and in that file define any of these properties:

compiler.c.extra_flags
compiler.c.elf.extra_flags
compiler.cpp.extra_flags
compiler.ar.extra_flags
compiler.elf2hex.extra_flags

You can examine platform.txt to see exactly where those properties will be expanded in the compilation recipes. For example:

recipe.cpp.o.pattern="{compiler.path}{compiler.cpp.cmd}" {compiler.cpp.flags} -mcpu={build.mcu} -DF_CPU={build.f_cpu} -DARDUINO={runtime.ide.version} -DARDUINO_{build.board} -DARDUINO_ARCH_{build.arch} {compiler.cpp.extra_flags} {build.extra_flags} {compiler.libsam.c.flags} {includes} "{source_file}" -o "{object_file}"

The same requirement of restarting the IDE applies for platform.local.txt.

There is also the possibility to pass these properties from the command line if you're using the Arduino IDE CLI. For example:

arduino --pref compiler.cpp.extra_flags=-O0 --upload --board arduino:sam:arduino_due_x_dbg foobar.ino

Unfortunately it's only possible to do this when compiling from the command line. You can't set the compiler flags as used by compilation in the Arduino IDE GUI from the command line.

More information on the Arduino IDE CLI:

github.com

arduino/Arduino/blob/master/build/shared/manpage.adoc

// Generate a manpage with: a2x -f manpage manpage.adoc
// or HTML with: a2x -f xhtml manpage.adoc
//
// This file uses {empty}:: in some places, to allow putting multiple
// paragraphs inside a single label list item. This is a bit ugly and
// non-semantic, but it seems this is the best way to do this. Asciidoc
// also supports putting a plus sign on a line by itself to join two
// paragraphs into a single list item. However, the indentation on the
// second paragraph makes that formatted with a fixed-size font.
// Removing the indentation completely makes the asciidoc source very
// unreadable. Also, for the --board option, there is a a paragraph,
// followed by a list, followed by another paragraph. The + approach can
// only put the latter paragraph into the inner list, not the outer
// one...

ARDUINO(1)
==========
:doctype: manpage

NAME

This file has been truncated. show original

Topic		Replies	Views
Board arduino_due_x_dbg (..) is unknown Error compiling. IDE 1.x	5	6079	May 5, 2021
[solved] Can't program Due with Arduino IDE after "updating the boards" Due	1	1336	May 6, 2021
1.6.4 is great! But how do I set -std=gnu++11 for SAM boards IDE 1.x	1	512	May 5, 2021
Arduino 1.6.7 & Due: package unknown IDE 1.x	4	1178	May 5, 2021
Compiler Error for Arduino Due Due	4	5800	May 6, 2021

Compiler optimisation for due board

Related topics