The normal values of RTOS in ARM9?

Started by achilles in comp.arch.embedded11 years ago

Hello,expert I am a student from China. I am trying to porting a RTOS from x86 to ARM9 now. In my test phase, I find the basic performance...

Hello,expert I am a student from China. I am trying to porting a RTOS from x86 to ARM9 now. In my test phase, I find the basic performance values of my ported RTOS are too longer than the original RTOS's values(average 10 times). I am very puzzle, i think maybe the MMU's code has something inefficient. Can you give me some normal values(ARM920T 200MHz,MMU enabled) and advices? ...


want to learn RTOS

Started by vishal in comp.arch.embedded15 years ago 11 replies

Hi, Can anybody suggest me good rtos material.I have good amount of exp in embedded software devp.I've never used any rtos so far.Something...

Hi, Can anybody suggest me good rtos material.I have good amount of exp in embedded software devp.I've never used any rtos so far.Something tht will help me leverage my exp would be great Thank u Vishal Patil


Dot printer in RTOS

Started by Massimo Dazzan in comp.arch.embedded16 years ago 1 reply

Hi all... I have an application that runs on a PC104 in a RTOS enviroment ( On-time RTOS-32). Now i need to control a dot printer (EPSON...

Hi all... I have an application that runs on a PC104 in a RTOS enviroment ( On-time RTOS-32). Now i need to control a dot printer (EPSON LQ300+); to make it i need to write a low level driver to manage LPT port signals. I have no experience in it... ....please help me.... Thank's in advance Massimo


C/OS-II RTOS on Windows

Started by Anonymous in comp.arch.embedded14 years ago 1 reply

Hi, I would like to know if there is some method to have my =B5C/OS-II RTOS on Windows. Kindly tell me some tricks/ links. Is there any...

Hi, I would like to know if there is some method to have my =B5C/OS-II RTOS on Windows. Kindly tell me some tricks/ links. Is there any Simulator for =B5C/OS-II RTOS on Windows ? Thx in advance,=20 karthik bala guru


application project for RTOS

Started by Anonymous in comp.arch.embedded12 years ago 8 replies

Hi all, I have knowledge of RTOS. can anyone suggest application projects where we can use RTOS? Or some sites where i can find out this kind...

Hi all, I have knowledge of RTOS. can anyone suggest application projects where we can use RTOS? Or some sites where i can find out this kind of projects. Thanks.


*Exclusive* use of zero-copy semantics in RTOS

Started by D Yuniskis in comp.arch.embedded10 years ago 2 replies

Hi, I'm writing another multimedia RTOS and looking through the code I've written that *used* other such beasts in the past (wise move, eh? ...

Hi, I'm writing another multimedia RTOS and looking through the code I've written that *used* other such beasts in the past (wise move, eh? :> ). It seems like moving zero-copy semantics *formally* into the RTOS's contract should help improve application robustness -- instead of relying on ad-hoc implementations by the developer. Of course, this makes it a bit more cumbersome to pa


Named RTOS objects

Started by D Yuniskis in comp.arch.embedded10 years ago

Hi, I often implement an object namespace (visible to the application at run-time) for primary objects managed by the RTOS. This is...

Hi, I often implement an object namespace (visible to the application at run-time) for primary objects managed by the RTOS. This is invaluable in distributed applications as it allows the implementations to be more effectively decoupled (I really can't imagine any other way of supporting such applications that wouldn't be incredibly brittle!). But, the RTOS I'm currently writing doesn'...


Embedded RTOS - features poll

Started by Stargazer in comp.arch.embedded9 years ago 46 replies

Greetings, I am writing my own RTOS, which I intend to use in my projects and license for anyone who would like to use it. At first I will use...

Greetings, I am writing my own RTOS, which I intend to use in my projects and license for anyone who would like to use it. At first I will use it in my own projects, so that it achieves a certain level of real-life performance and stability, then release it. The idea is to employ a "classic" embedded RTOS design (single address space, multiple tasks, "hard" RT scheduling) with as much co...


RTOS system design--how many tasks?

Started by Anonymous in comp.arch.embedded13 years ago 19 replies

Hi, We're designing a new system using an RTOS. Everyone on the team has worked with an RTOS before, but none of us has ever designed...

Hi, We're designing a new system using an RTOS. Everyone on the team has worked with an RTOS before, but none of us has ever designed a system. One thing I'm concerned with is we may end up with too many tasks. I reviewed my papers/magazines and searched the web for half a day and didn't get much info. So, for those of you who've been through this before, I have a couple of basic quest...


Self restarting property of RTOS-How it works?

Started by Anonymous in comp.arch.embedded15 years ago 111 replies

Dear all, I was going through the explaination for taskRestart() call in the vxworks reference manual.I believe such a feature is available...

Dear all, I was going through the explaination for taskRestart() call in the vxworks reference manual.I believe such a feature is available for most of the RTOS in the market.This dicussion talks about vxworks,But it applies in general for any rtos which offers a restarting facility.I am looking for replys from a architecture perspective rather then os specific discussion. Vxworks refer...


RTOS for ARM Cortex M1?

Started by bo in comp.arch.embedded9 years ago 1 reply

Does anyone know of either a free or commerical RTOS that supports ARM Cortex M1? I'm finding that some vendor's websites claiming support are...

Does anyone know of either a free or commerical RTOS that supports ARM Cortex M1? I'm finding that some vendor's websites claiming support are inaccurate. Looking for RTOS with filesystem and drivers to support a SoC implentation in an Actel FPGA... Any recommendations? Thanks, Bo --------------= Posted using GrabIt =---------------- ------= Binary Usenet downloading made easy =...


Implementation details of semaphore objects in RTOS

Started by ssubbarayan in comp.arch.embedded11 years ago 2 replies

Dear Experts, I am interested in knowing how do RTOS implement semaphore objects?It would be helpful if some one could let me know some...

Dear Experts, I am interested in knowing how do RTOS implement semaphore objects?It would be helpful if some one could let me know some links or some of your thoughts from your own experience. This is part of my own learning to update myself on what goes beneath when you take a semaphore or give a semaphore in a RTOS. Looking farward for your thoughts and advanced thanks for the s...


Helppppp on Context Switching.

Started by #define in comp.arch.embedded14 years ago 6 replies

Hello, I have one basic doubt about how context switching work in RTOS. Where does the RTOS saves the PC (Program Counter). Is it on the...

Hello, I have one basic doubt about how context switching work in RTOS. Where does the RTOS saves the PC (Program Counter). Is it on the stack of the thread (Then how PC is pushed (i guess only CALL instruction has that power), or can PC be treated as any other register especially in 32bit RISC uC and pushed on stack)? Then, how does the contents of PC changed by RTOS once it is done ...


Dumb RTOS Question

Started by Anonymous in comp.arch.embedded13 years ago 20 replies

Starting on my first RTOS project and can't quite see the logic to the interprocess communications. The Zilog RTOS offers message queues, but if...

Starting on my first RTOS project and can't quite see the logic to the interprocess communications. The Zilog RTOS offers message queues, but if the queue is empty the reading process is suspended until something shows up in the queue. Well sorry, that isn't good because my process has multiple things it needs to monitor periodically. It can't get hung on just one message queue. I thought a m...


RTOS

Started by Charan in comp.arch.embedded12 years ago 2 replies

hi all, I want to know about the RTOS in depth, Please suggest me some links and books,... Thanks and Regards, Charan.

hi all, I want to know about the RTOS in depth, Please suggest me some links and books,... Thanks and Regards, Charan.


porting tcp/ip stack from one rtos to another

Started by elitekatti in comp.arch.embedded12 years ago 5 replies

Very new to the concept of porting code across RTOS'es. Now i need to port the tcp/ip code from one RTOS to another. Need suggestions as to how...

Very new to the concept of porting code across RTOS'es. Now i need to port the tcp/ip code from one RTOS to another. Need suggestions as to how can i start with this??


8051

Started by zibidi in comp.arch.embedded14 years ago 31 replies

HI all, I am trying to implement a 8051 based RTOS. Now I have to write a context switch function. I think that , copying all the...

HI all, I am trying to implement a 8051 based RTOS. Now I have to write a context switch function. I think that , copying all the neccesarry registers without pushing on to the stack works , do you think is this a good idea? Also what stack size is suitable for my RTOS ? (I think 64 byte is ok) If anyone write an 8051 based RTOS can you give me suggestions please? ...


Plz help me finding the logic for implementing the BCC2 and ECC2 in OSEK RTOS

Started by alag...@gmail.com in comp.arch.embedded12 years ago 7 replies

hi, i am developing OSEK RTOS. we already implemented the BCC1 and ECC1 in our RTOS.. its working fine in application also... Bcc1 and Ecc1...

hi, i am developing OSEK RTOS. we already implemented the BCC1 and ECC1 in our RTOS.. its working fine in application also... Bcc1 and Ecc1 will support the following 1.One Task per priority now we r upgrading our RTOS to support BCC2 and ECC2 conformance class. BCC2 and Ecc2 will support the following 1.More number of task per priority 2.More no. of activation of a task did any one ...


Microcontroller Vs Microprocessor for RTOS

Started by Anonymous in comp.arch.embedded15 years ago 7 replies

Dear all, I am just curious to know why almost all commercial popular RTOS like RTLINUX,Vxworks work mainly on Micro processor instead...

Dear all, I am just curious to know why almost all commercial popular RTOS like RTLINUX,Vxworks work mainly on Micro processor instead of Microcontrollers? AFAIK,I have seen Vxworks work on Boards like Intel x86,powerpc,ARM and all mentioned processor boards instead of real microcontrollers like 8051,68HC series from motorola and so. Why do RTOS prefer microprocessors as compared to microco...


Free RTOS for Motorola powerQuic???

Started by Anonymous in comp.arch.embedded14 years ago 4 replies

Hello all, I am monica from Germany. I am searching for a free RTOS for Motorola powerQuic processors. Is there any free/cheap RTOS with...

Hello all, I am monica from Germany. I am searching for a free RTOS for Motorola powerQuic processors. Is there any free/cheap RTOS with Vxworks porting library??? Thanks a lot fo your valuable information. Monica Dsouza, Germany