The SBC-SAMA5D36 is based on the Microchip ATSAMA5D36 processor and supports the Linux operating system. The previous Linux version Yocto Dizzy (1.7) has now been replaced by the current version Yocto Sumo 2.5.3. Read the details in the following article.
Today software installation is facing lot of issues and many problems to overcome, especially into the expandable world of IoT devices. The firm Canonical is aiming to fix this with the snapcraft project (https://snapcraft.io). Snaps are containerised software packages that are simple to create and install. They auto-update and are safe to run. And because they bundle their dependencies, they work on all major Linux systems without modification.
We recently released our new mainline-Kernel based Debian and Yocto BSPs for our i.mx6 based System on Modules. In this article we'll give you a short overview of the advantages of the new BSP era! Beside the recent Kernel Versions delivered, new userspace APIs have to be used to access peripherals.
Today we released a beta version of a new root file system for the SBC-SAMA5D36. The main changes are a new Kernel Version and the use of systemd as init system. The Kernel version is 4.9 and is a longterm maintained kernel (see this page for more information). Systemd has some advantages over sysv like parallel start of services (if possible), delaying of the start until a service or device is really needed, and it is compatible to the old sysv init scripts. Systemd also has some other advantages like builtin monitoring of running services and restart of them if they crash or stop working and also better dependency handling of services.
Use this beta release at your own risk. There are some known issues and mabye also some unknown ones. We will stabilize this release during the next weeks and bring out a stable release. Please find the release under following link:
In the past few months emtrion has broaden its knowledge base towards the open source virtualization platform Jailhouse . The eventual goal is to provide customers a virtualization solution that is real-time capable, lightweight, secure, certifiable and operable on emtrion hardware. The main advantage to customers will be the reduction of costs through the combination of multiple hardware units into one single unit that handles multiple tasks.
In general most of emtrion’s hardware comes with interfaces like Ethernet, RS232, CAN, GPIOs, I2C, SPI. In addition, the used CPU modules are supported by a powerful microprocessor.
Such preconditions are predestinated in controlling industrial systems. In many cases, programming in this environment is based on the widely-known standard IEC 61131-3.
If you consider these items, the question to ask is, are there any reason why you are not using emtrion's hardware as PLC. Not really. On the one hand it's dependent on the use case and its requirements such as real-time, certification etc. and the other hand on the effort needed to transform it to a PLC.
Transforming is an independent part of the use case and means to make an emtrion hardware a PLC. The transformation is limited by adding a piece of software, the so called RTS (runtime system) to the RFS (root filesystem).
The RTS we used, it is possible to make a PLC in less than one work day.
Following the proceeding steps are described.