51–60 of 106 posts
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It's a nice present from Amazon. They should keep doing this, I'd like a MIT licensed QNX next please. God knows they have the money.
GPL would be fine too; I'd just like something that actually qualifies as FOSS, rather than something proprietary.
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Richard Barry, founder of FreeRTOS, has joined AWS as a principal engineer, and will continue to support Amazon FreeRTOS. WITTENSTEIN high integrity systems (WHIS) will continue to support and develop OPENRTOS and SAFERTOS, commercial implementations of FreeRTOS for projects that require certification or support. Richard released FreeRTOS in 2003, and had been working on FreeRTOS in partnership with WHIS since 2006,…
I do hope they'll keep maintaining it - I've been working with an ESP32 lately and the stuff Espressif has been able to build using FreeRTOS as a base is nothing short of incredible. $7 for wifi and bluetooth on a development board.
>Amazon FreeRTOS ... and extends it with software libraries that make it easy to securely connect your small, low-power devices to AWS cloud services why do IoT devices have to connect to the cloud? Is there any legitimate use case other than reporting data gathered on the customer? Why do have all these gadgets have to snoop on us?
What's the advantage of a RTOS?
One of the things I like about an RTOS is the organization it gives to your code. It gives you primitives like tasks, queues, and semaphores and allows you to easily organize and synchronize independently running tasks. On something like Arduino where you just have a setup() and a loop() function, it can become a mess if you're trying to do many different things with different timing requirements.
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The advantage is that you can make claims about the maximum time it take to process something. Contrast that to Windows, macos, or Ubuntu that generally are zippy on new hardware, but sometimes the circle spins or the hourglass shows up and makes you wait, possibly for an outsized period of time for what is being processed.
To make any worthwhile claims you need the worst case execution time of your code. Even in the absence of multi-threading, technologies like caches or out-of-order execution can make this quite painful. The common solution seems to be: Don't care for some missed values (e.g. non-safety critical systems) or over provisioning (absence of budget pressure). -> A RTOS alone doesn't give you any reliable claims (but does m…
Earlier quoted context omitted.
To make any worthwhile claims you need the worst case execution time of your code. Even in the absence of multi-threading, technologies like caches or out-of-order execution can make this quite painful. The common solution seems to be: Don't care for some missed values (e.g. non-safety critical systems) or over provisioning (absence of budget pressure). -> A RTOS alone doesn't give you any reliable claims (but does m…
What I assume IncRnd is referring to is the deterministic behavior of an RTOS. Here is a good white paper from National Instruments: http://www.ni.com/white-paper/3938/en/
My money is on Linux based RTOS platforms. It's a bit of a surprise that Amazon has backed a non-Linux horse in this race.
My money is on Linux based RTOS platforms. It's a bit of a surprise that Amazon has backed a non-Linux horse in this race.
[1] http://dmitry.gr/index.php?r=05.Projects&proj=07.+Linux+on+8...
My money is on Linux based RTOS platforms. It's a bit of a surprise that Amazon has backed a non-Linux horse in this race.
No existing Linux-based RTOS that I know of will run on a microcontroller. Not enough Flash for program memory or RAM for volatile storage. Can any useful Linux-based RTOS kernel fit into 1MB of non-volatile storage and use less than ~512KB RAM; would love to know of one if it exists!