rtos Questions
3
Solved
static void RadioReleaseSPI(void) {
__disable_interrupt();
spiTxRxByteCount &= ~0x0100;
__enable_interrupt();
}
I understand that multiple tasks may attempt to use the SPI resource. spiTxR...
5
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3
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In operating system what is the difference between message queues and mailboxes.
Cordiality asked 27/10, 2015 at 15:24
2
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For my next embedded systems project I want to embrace unit testing. It may not technically be test driven development, but I would at least like to instrument unit tests up front and have comprehe...
Narcose asked 30/4, 2015 at 14:2
2
Solved
I try to understand why the user has to call the taskYIELD_FROM_ISR() method and why it isn't automatically called by the RTOS within the xStreamBufferSendFromISR method.
My question refers to the...
Gunfight asked 30/10, 2019 at 17:58
14
Solved
When should one use polling method and when should one use interrupt based method ?
Are there scenarios in which both can be used ?
Izard asked 18/6, 2010 at 20:23
2
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what does mean x and v in task creating or managing of free RTOS?
xTaskcreate or vTaskcreate?
2
Who schedules the scheduler?
Which is the first task created and how is this first task created? Isn't any resource or memory required for it? isn't like a chicken and egg scenario?
Isn't schedul...
Strabismus asked 12/2, 2010 at 8:10
1
Solved
Quoting the documentation (emphasis theirs)
Timer callback functions execute in the context of the timer service task. It is therefore essential that timer callback functions never attempt to bl...
2
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I was reading this article, but my question is on a generic level, I was thinking along the following lines:
Can a kernel be called real time just because it has a real time scheduler? Or in oth...
Donte asked 7/3, 2014 at 4:8
5
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I want to understand the concept underlying a hard realtime system more specifically by using an RTOS. By the definition of an RTOS it guaranties the realtime tasks will never exceed their deadline...
5
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I am writing embedded applications for different hardware (avr, arm7, tms55xx…) and different rtoses (freeRTOS, rtx, dsp/bios). And every second of them needs to communicate with PC or anothe...
Misfeasance asked 16/4, 2010 at 22:48
3
What is the difference between FreeRTOS and CMSIS-RTOS? Can anyone explain how the two RTOSes are similar or different?
2
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Problem
I am creating a Windows 7 based C# WPF application using .Net 4.5, and one its major features is to call certain functions that interface with custom hardware with a set of user defined cy...
Hispidulous asked 28/7, 2016 at 11:20
4
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When the LwIP netconn_accept() or netconn_recv() function is called, if we are using a RTOS, it will block the thread and wait for a connection until timeout or forever, depends on the setting of L...
Tutankhamen asked 1/6, 2012 at 10:47
3
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Hi I'm a newbie in RTOS and in almost every document I read, it indicates that the tasks must be in infinite loop but none states why. Can anyone help explain this? Thanks
1
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I wish to write a very basic RTOS which can just switch between two tasks. Its not for any professional usage. Its just for fun
Most references say about how to use an RTOS and not about how to wr...
Monney asked 3/3, 2015 at 11:24
1
I have a requirement which need to repeatedly allocate and deallocate memory. Currently trying it on Integrity ARM simulator.
I have created two tasks :
First task(encoder): receives video data fr...
Liveried asked 11/11, 2014 at 17:42
2
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Suppose there is two task running TASK_A and TASK_B. While TASK_A is running an interrupt occurred and a context switch to TASK_B is needed.
While inside ISR, TASK_B should not be directly jumped ...
2
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The beaglebone Black processor includes two independent Programmable Real Time Units (PRUs). Hobbyists and professionals are excited about possible use of these units for real-time applications, wh...
Cantu asked 23/11, 2014 at 18:59
1
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RTOS and Embedded Linux are used for embedded systems programming. Is Embedded Linux itself an RTOS ? Can anyone list the comparison or difference please?
Facia asked 16/9, 2014 at 14:32
1
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I'm currently working on an embedded project using an ARM Cortex M3 microcontroller with FreeRTOS as system OS. The code was written by a former colleague and sadly the project has some weird bugs ...
2
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I am currently in the process of developing the OS for a consumer electronics product my company is developing. I have settled on freeRTOS as the backbone for our OS, and am working diligently to i...
Plucky asked 20/2, 2014 at 21:21
1
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6
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I am looking for mostly used 5 Real-Time operating systems. I searched on Google and Wikipedia has a list of RTOSs, but they are in random order and also I am not convinced that all of them r...
Aldrin asked 12/3, 2011 at 10:1
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