1   ARM dev tools per Debian (Sid) - ITA

Author:Andrea Manni
Copyright:GFDL
Version:0.1

Questi appunti sono ad uso privato.

Generato il 2015-12-28 con: http://docutils.sourceforge.net/rst.html

1.1   Debian arch

Modify sources.list to have::
deb http://ftp.debian.org/debian/ sid main non-free contrib

As often mirrors don’t have Debian armhf port availabe. You need to pull the ftp archive.

Add the right architecture: for ARM we use:

dpkg --add-architecture armhf
apt-get update
dpkg --print-architecture # That's what your host is using
dpkg --print-foreign-architectures  # That's your target enviroments

Now install the cross compiler, Sid should have a pretty well updated version. You may wanna take a snapshot / backup of the system now:

lvcreate -s -L5g -n sid_bak /dev/main/sid
apt-get install crossbuild-essential-armhf

The cross compiler is meant to build code for a Linux system, something like a embedded RaspberryPy running Debian and not a Cortex ARM processor for any microcontroller.

1.2   Test the build chain

Take whathever c++ example file:

#include <iostream>                           // a PREPROCESSOR directive
using namespace std;                      // make definitions visible
int main()                                    // function header
{   // start of function body
    cout << "This is ARM code.";  // message
    cout << endl;                             // start a new line
    cout << "You won't regret it!" << endl;   // more output
    return 0;                                 // terminate main()
}                                             // end of function body
And compile it::

arm-linux-gnueabihf-g++ hello.cpp file a.out

a.out: ELF 32-bit LSB executable, ARM, EABI5 version 1 (SYSV), dynamically linked, interpreter /lib/ld-linux-armhf.so.3, for GNU/Linux 3.2.0, BuildID[sha1]=0ecbdddcde90341984c81cddc027d9cb127503c9, not stripped

Questo dovrebbe girare su una OrangePC / RPi:

OrangePI:/tmp:$ dpkg --print-architecture
armhf

Ma possiamo testare il binario su x86 (AMD64) con Qemu:

apt-get install qemu-user-static
apt-get install libicu-dev:armhf

Libraries should go to: /usr/lib/arm-linux-gnueabihf/ .

1.3   Boards

Cortex M4 is ARMv7E-M

1.4   Eclipse

Download last version of eclipse CDT: https://eclipse.org/cdt/downloads.php

Create a new project “hello world” like:

* Cross compiler Prefix: arm-linux-gnueabihf-
* CC Path:  /usr/bin

It should compile, Project properties -> Tool Chain -> should say Cross CC .

1.5   Debug su remoto embedded

Questa procedura e’ per i sistemi embedded come RPi / OrangePi in cui e’ disponibile un sistema operativo Gnu/Linux su cui possiamo installare un GDB server e copiare i file oggetto via SSH o simile.

Install from the main archive “General purpouse tools” -> Remote System Explorer User Actions” . Con questo si puo’ stabilire una connessione (SSH - FTP) a un host embedded come RPi.

1.5.2   Debug client sull’host

Installare il client muliarch e precisare dentro il Workspace di Eclipse che trattasi di ARM:

apt-get install gdb-multiarch

vim ~/workspace/arm/.gdbinit

set architecture arm

1.6   uC ARM plugin per Eclipse

Aggiungere http://gnuarmeclipse.sourceforge.net/updates ai repo del software per Eclipse, installare ``

::

cd stlink/ apt-get install autoconf

./autogen.sh

./configure apt-get install libusb-1.0-0-dev # dipendenze secondo bisogno make sudo make install

1.8   Gnu-ebi

Gnu-ebi are needed for system with no FPU like most of the old cortex uC.