Raspberry Pi Dev: Difference between revisions

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In this case you have to edit your '''.profile''' file and add the row
In this case you have to edit your '''.profile''' file and add the row
  export PATH=/home/axel/toolchain_RPI_orig/tools-master/arm-bcm2708/gcc-linaro-arm-linux-gnueabihf-raspbian/bin:$PATH
  export PATH=/home/axel/toolchain_RPI_orig/tools-master/arm-bcm2708/gcc-linaro-arm-linux-gnueabihf-raspbian/bin:$PATH
in order to make the compiler available to the system.
in order to make the compiler available to the system.<br>
At this point make folder and uncompress '''PluginHeaders_2.6.2.zip''' in it. You can download the file from our site, in the Dowload section.<br>
Plugin headers expose the LLExec API to interface with the runtime, they require that some defines are set in order to compile correctly. As you will see after, these defines will be already defined in the Makefile.<br>
Now please download and uncompress the file '''LLXPlugin_PIFACE.zip''' in the previous foldere where you have already uncompress the plugin headers.


=Compile the plugin=
=Compile the plugin=

Revision as of 14:49, 21 November 2017

Summary

The purpose of this page is to allow expert Raspberry PI developers to extend the PLC runtime.
It shows up how the interface to PiFace I/O board can be implemented from scratch.
You can clone the example to implements inteface with your own I/O module.

Prerequisites

To follow this guide you need:

  • A Raspberry PI with a running and licensed PLC runtime (LLExec >= 2.6.2 is suggested).
You can install the runtime following the guide in http://www.axelsw.it/pwiki/index.php?title=Raspberry_Pi
  • A Raspbian cross-compile toolchain
You can download it from https://github.com/raspberrypi/tools

Setup your Linux machine

Please uncompress the toolchain and find the path of the compiler tools: for example suppose they are under the folder

/home/axel/toolchain_RPI_orig/tools-master/arm-bcm2708/gcc-linaro-arm-linux-gnueabihf-raspbian/bin

In this case you have to edit your .profile file and add the row

export PATH=/home/axel/toolchain_RPI_orig/tools-master/arm-bcm2708/gcc-linaro-arm-linux-gnueabihf-raspbian/bin:$PATH

in order to make the compiler available to the system.
At this point make folder and uncompress PluginHeaders_2.6.2.zip in it. You can download the file from our site, in the Dowload section.
Plugin headers expose the LLExec API to interface with the runtime, they require that some defines are set in order to compile correctly. As you will see after, these defines will be already defined in the Makefile.
Now please download and uncompress the file LLXPlugin_PIFACE.zip in the previous foldere where you have already uncompress the plugin headers.

Compile the plugin

Plugin concepts

Edit pll library

Configure runtime

Access from LogicLab

Further readings