USB-SD-Mux: EMC Testing
Today Jonas and I went to our EMC testing lab to continue the measurements needed to certify electromagnetic compatibility for the USB-SD-Mux.
To make it short: It has passed the radiation tests. In the end we found out that it wasn't the USB-SD-Mux itself that caused us a lot of headache. We are now quite confident that most radiation was caused by the system we used to stimulate the USB-SD-Mux. In the end we had the stimulation-box (containing a Beagle Bone Black) hidden behind multiple absorber-panels beneath the measurement table. This way we were able to dampen enough noise to pass tests. It seems for our next measurements we need to find something other than a Beagle Bone Black for that.
This brings us a lot closer to finally bring the USB-SD-Mux to you. But testing is not completely done: Next step is to pass the RF-immunity tests. We keep our fingers crossed!
If it looks like an advertising blogpost, reads like an advertising blogpost ... it probably is an advertising blogpost! Nobody likes to read advertisements and we don't like to write them at all, but like all proud parents, we would like to show you the new products that our corporate subsidiary, Linux Automation GmbH, has freshly added to their store. With these new products we, and maybe soon you, will complete (y)our Remotlab infrastructur.
I would like to present to you the LXA IOBus, a CAN-based ecosystem consisting of a protocol, a gateway server and new class of Linux Automation GmbH devices, including the Ethernet-Mux and the 4DO-3DI-3AI input/output board.
Project work with our customers includes the handling of hardware prototypes. Since work is generally done in parallel, on many project for many customers, there is a constant flood of hardware prototypes accumulating on the desks of our developers. These accumulations of loose boards can become a problem. This is especially the case when a number of people work on a prototype. Another common annoyance occurs when a project has not been worked on for a period of time, as this might involve moving the hardware from one desk (or storage location) to another and setting it up again. Right now, in a situation where working from home is more common and relevant than ever, this has become even more of an issue. The distances between desks and storage locations of our developers are now measured in kilometers, rather than meters.
A firmware upgrade is due. A newly implemented feature needs to be rolled out, a security issue patched or new hardware support added. The software, while capable, is complex. Pengutronix' strategy to handle this complexity is working on a version- controlled Board Support Package (BSP) with continuous updates and tests on the latest mainline Linux kernel.
This year, a team from Pengutronix attended FrOSCon in St. Augustin for the first time. We took the opportunity to shake hands, talk about our latest developments and meet hackers interested in working with embedded Linux.