Difference between revisions of "Beremiz"

Revision as of 15:07, 17 July 2013

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Introduction

Beremiz is free software toolkit for automation. It's conform with IEC61131 languages and can drive graphicaly your system.

Beremiz is divided in two softwares:

• Beremiz.py: The Graphical toolkit that run on the Host to drive the target.
• Beremiz_service.py: The target runtime that execute the code compiled by Beremiz.py and sent throught network to its.

Then there are two triky things to do to use beremiz on APF* platforms :

• Configure Beremiz.py to cross-compile binary for ARM
• Run python program Beremiz_service.py on apf.

Installation

Host

To see how to install Beremiz on your host, please see the official website (How to build with Linux).

Target

APF28

Python 2.7 and Pyro are required to run Beremiz_service.py.

install python 2.7

run

make menuconfig

On up to date armadeus trunk view, then select :

Package Selection for the target  --->
    Interpreter languages and scripting  --->
        [*] python
            python module format to install (.py sources only)  --->
                          (X) .py sources only
         core python modules  --->
                    [*] bzip2 module
                    [*] bsddb module       
                    [*] codecscjk module   
                    [*] curses module      
                    [*] pyexpat            
                    [*] readline           
                    [*] ssl                
                    [*] unicodedata module 
                    [*] sqlite module      
                    [*] zlib module        
                    [*] hashlib module     

then make :

$ make

Install Pyro3.14

Pyro 3.14 is included under armadeus distribution :

make menuconfig

Package Selection for the target  --->
    Interpreter languages and scripting  --->
        external python modules  --->
            [*] python-pyro

Install Beremiz_service.py

The tricky method is nearly the same than Pyro.

• copy your beremiz directory under your nfs directory.
• launch it with python on your target:

# cd /mnt/nfs
# python Beremiz_service.py 
Wx unavailable !
Twisted unavailable !
Pyro port : 3000
Pyro object's uri : PYRO://127.0.1.1:3000/7f00010102d100069fec101918092f7c
Current working directory : /mnt/nfs/beremiz

Simple usage

Target connection

• When Beremiz.py is launched on your Host, create or open a project then save it.
• With your favorite editor edit the file beremiz.xml then change the URI line:

<BeremizRoot URI_location="PYRO://192.168.0.33:3000">

Replace 192.168.0.33 by the IP of your APF28.

• Re-open your project then clic on «connect» icon.
• You can compile your project and try to send it...
• ... but you will have this error :

PLCobject : OFF LOG :NewPLC (d8ad51386680f2337309dc55eddb4383)
python: '/mnt/nfs/beremiz/d8ad51386680f2337309dc55eddb4383.so' is not an ELF executable for ARM
PLCobject : Traceback (most recent call last):
  File "/mnt/nfs/beremiz/runtime/PLCObject.py", line 135, in LoadPLC
    self._PLClibraryHandle = dlopen(self._GetLibFileName())
OSError: File not found

• Because the defaut compliler for Beremiz.py is not for arm ...

• To configure your compiler, go to project configuration (double clic on head of hierarchy) and adding the path of your compiled armgcc :

YOUR_ARMADEUS_PATH/buildroot/output/host/usr/bin/arm-buildroot-linux-uclibcgnueabi-gcc

for linker and compiler.

• You can then compile and transfert the program to target...
• ... but there still an error :

PLCobject : OFF LOG :NewPLC (d8ad51386680f2337309dc55eddb4383)
python: '/mnt/nfs/beremiz/d8ad51386680f2337309dc55eddb4383.so' is not an ELF executable for ARM
PLCobject : Traceback (most recent call last):
  File "/mnt/nfs/beremiz/runtime/PLCObject.py", line 135, in LoadPLC
    self._PLClibraryHandle = dlopen(self._GetLibFileName())
OSError: File not found

• This can be tricky fixed by changing code in beremiz beremiz/targets/Linux/plc_Linux_main.c :

/*
long AtomicCompareExchange(long* atomicvar,long compared, long exchange)
{
    return __sync_val_compare_and_swap(atomicvar, compared, exchange);
}
long long AtomicCompareExchange64(long long* atomicvar, long long compared, long long exchange)
{
    return __sync_val_compare_and_swap(atomicvar, compared, exchange);
}
*/
//XXX
long AtomicCompareExchange(long* atomicvar,long compared, long exchange)
{
    long res;

    res=*atomicvar;
    if(*atomicvar == compared){
        *atomicvar = exchange;
    }

    return res;
}
//XXX
long long AtomicCompareExchange64(long long* atomicvar, long long compared, long long exchange)
{
    long long res;

    res=*atomicvar;
    if(*atomicvar == compared){
        *atomicvar = exchange;
    }

    return res;
}

Links

• Home page of project.