What RTOS have you used or recommend for 32-bit processors. I'm interested in mainstream processors here: PowerPC, Pentium, ARM, MIPS A link to a web site would be a nice bonus. Let's conduct this as a poll. Please only provide one selection per answer and mod up if you agree with a selection already present. ...
In the vxWorks RTOS, there is a shell that allows you to issue command to your embedded system. The documentation refers to kernel shell, host shell and target shell. What is the difference between the three? ...
We have two tasks (T1 and T2) in our vxWorks embedded system that have the same priority (110). How does the regular vxWorks scheduler deal with this if both tasks are ready to run? Which task executes first? ...
It does not need to be a full fledged OS, but at least have multitasking capabilities (i.e. a scheduler). Please mention what processor architecture it works on. This is a survey, so exact capabilities are not really important. Think of this as being a place to look at for possibilities when your next 8-bit embedded project comes up......
What RTOS is best for working on the same PC with Windows? I know about RTX and INtime, but have not used them. Are there any others? Which one is your favorite and why? ...
I have an existing codebase targeting a Windows environment and with an eye to the future, would like to make this as cross platform as possible. I've had some sucess with standard Linux distributions by using cross platform libraries but would like to extend this to Realtime and or embedded operating systems. Would it be possible to po...
On a small embedded system project we have some code which we would like to run in a thread so we are electing to build in top of an embedded RTOS (eCos). Previously, we have used a cyclic executive in main() that drove tasks each implemented as a state machine. For some tasks we encountered problems where the task would need to be bro...
I'm refactoring "spaghetti code" C module to work in multitasking (RTOS) environment. Now, there are very long functions and many unnecessary global variables. When I try to replace global variables that exists only in one function with locals, I get into dilemma. Every global variable is behave like local "static" - e.g. keep its valu...
I'm programming in C for RAM limited embedded microcontroller with RTOS. I regularly break my code to short functions, but every function calling require to more stack memory. Every task needs his stack, and this is one of the significant memory consumers in the project. Is there an alternative to keep the code well organized and reada...
Are there any open source real time operating systems out there? I've heard of real-time Linux, but most implementations seem to really be a proprietary RTOS (that you have to pay for) that run Linux as a process -- much the same way Ardence's RTX real-time system works for Windows. EDIT: I should clarify that I'm looking for RTOS to w...
I mean how and why are realtime OSes able to meet deadlines without ever missing them? Or is this just a myth (that they do not miss deadlines)? How are they different from any regular OS and what prevents a regular OS from being an RTOS? ...
I'm working on MPSOC, specially STM ST40 (SH4 base) and ST231 and I'm wondering which OS i can use on these to port a parallel application, I already had a look at STLinux which is the STM distribution of a Linux platform for their MPSOC (which unfortunately doesn't work well for ST231 coprocessors) and I also had a look at OS21 which is...
I am in the process of designing system with a many tasks and a lot of inter-task messages. The system will be basically developed in C. In my design I am trying to use UML representation to show the messages that are passed between tasks. But it is becoming difficult to represent things like decision making etc. Are their any predefi...
In an embedded application programmed on C on ARM7 (with portability requirements), currently using a commercial priority-based preemptive RTOS, we need to remove that RTOS and any RTOS dependency per customer mandate. We have 8 tasks using many HW interfaces, sleep statements, I2C communications. As it is, the SW makes good use of RTOS ...
What are your advice/experience of using a hypervisor (e.g. RTS Real-Time Hypervisor) to run an RTOS in parallel with a non real time OS. Are there any performance implications? Are there any risks involved? (like how can you ensure that the non-real time OS will not interfere with the real time aspects of the RTOS) From what I understa...
Does anyone have especially good (or bad) experiences with any of the following embedded TCP / IP stacks? uIP lwIP Bentham's TCP/IP Lean implementation The TCP/IP stack from this book My needs are for a solid, easy-to-port stack. Code size isn't terribly important, performance is relatively important, but ease of use & porting is ve...
I'm preparing myself to build RTOS solution on top of Linux this going to work on embedded device. I've done some investigation by myself but still I'm a bit confused. Those are my criteria: Easy to run on Samsung s3c2440 ARM9 machine Open Source Works together with Linux Good community support I've seen RTLinux and Xenomai. Xenomai...
Hello, I am planning to implement a small-scale data acquisition system on an RTOS platform. (Either on a QNX or an RT-Linux system.) As far as I know, these jobs are performed using C / C++ to get the most out of the system. However I am curious to know and want to learn some experienced people's opinions before I blindly jump into th...
I would like to be able to have a basic OS and a basic file system for the high end MSP430 probably the MSP430F5438. I know I can go with something like FreeRTOS , IAR PowerPac or Micrium to name just some of the options for the OS and file system. However I would like to be able to also have the ability to load little applets or threads...
I have an embedded system (ARM 9263) running an RTOS, IAR tools. The system supports the standard time() function which gives me the current time. I need the reverse call, that is I need to set the time - is there a "C" standard way to do this? I've googled around, sure thought it would be obvious, but perhaps it is platform dependent? I...