This is the Linux app named SimpleDCS whose latest release can be downloaded as simpledcs-1.0.15.tar.gz. It can be run online in the free hosting provider OnWorks for workstations.
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SimpleDCS
DESCRIPTION
SimpleDCS is a Distributed Control System made easy - fully configurable both on hardware and a software level. Experimental stage (alpha)
Features
- Separation of hardware-level control and external soft-level control - different processes are used, and the HW-level control can be used without soft-level (external) control process.
- Memory mapper module (mod_mmap) - allows to seamlessly exchange any kind of data between different physical devices (over network). This also allows to create network topologies of any kind, as any device can be mapped to any other device and vice-versa.
- Network connections are encrypted, using custom symmetric encryption algorithm, which is ultra-fast (but of moderate strenght) - designed for small embedded systems.
- Each of device/node module is running as a separate thread, with configurable priority and CPU affinity.
- Supervisor thread: controls execution time of device/node module threads.
- Thread-crash proof, thanks to use of C-exceptions (libcxc) - a crash in a sub-thread causes switching to a "SafeMode", where all the HW I/Os are set to a pre-configured state. See mod_crashtest code, which was used for testing :)
- Low-level DAQ - Data Acquisition subsystem, with Time Compression and Dead Band support - works in the background, no human intervention needed.
- High-level DAQ - Data Acquisition subsystem - implemented as a client application (DaqViewer) - allows to view, analyse and save historical records.
- HAL: Hardware Abstraction Layer: currently only one HW platform is supported (BCM2835), but it allows to compile and run the whole project on an x86 PC for testing - all the HAL functions are stubs in such case.
- MAL: Memory Abstraction Layer: allows to easily define/configure memory location address for exchanging data between different physical devices and for DAQ. The MAL implementation is based on a simplified absolute pointer structure (max segment size is 2MB).
- Both MAL and HAL functions are accessible for device modules (trough plugin interface).
Audience
Advanced End Users, Developers
User interface
Non-interactive (Daemon), wxWidgets
Programming Language
C++, C
This is an application that can also be fetched from https://sourceforge.net/projects/simpledcs/. It has been hosted in OnWorks in order to be run online in an easiest way from one of our free Operative Systems.
