Hi, I have a code in c for a chip(driver), which is calling functions of the vxworks RTOS. Functions such related to semaphores and queues. I...

Hi, I have a code in c for a chip(driver), which is calling functions of the vxworks RTOS. Functions such related to semaphores and queues. I need to port the drivers for RTEMS RTOS. Can someone please help me with how to go around with this. Regards, Amit

Gurus, For reasons undisclosed,We are asked by our clients to design a counting semaphore for their propreitory RTOS.I have some...

Gurus, For reasons undisclosed,We are asked by our clients to design a counting semaphore for their propreitory RTOS.I have some ideas presented here,I would like to know all your expert opinion whether this could be a proper design to go ahead and implement.I have few hiccups which till now I am not clear how to overcome.Heres what I planned to proceed like: The actual expectation ...

I heard that a RTOS always responds to an interrupt within a certain time, i.e. the response time is predictable. However, what happens when...

I heard that a RTOS always responds to an interrupt within a certain time, i.e. the response time is predictable. However, what happens when the interrupt or alarm is being handled and within that same time another time critical alarm goes off? I assume it is simply flagged or an exception is triggered which sounds a siren or something because it can't preempt the currennt handler

Hi. Does anybody have recent numbers on the current marked share of the main RTOS players? I see claims from some manufacturers or even in...

Hi. Does anybody have recent numbers on the current marked share of the main RTOS players? I see claims from some manufacturers or even in some articles around the internet but I would like to have the research data that support them. Pointers to recent market share research (not necessarily free as in gratis) are also welcome. Thank you in advance. Josias.

Hello, I do not have a idea, where a RTOS on a singlechip microcontroller is good for. I know, that it is good for making two (or more)...

Hello, I do not have a idea, where a RTOS on a singlechip microcontroller is good for. I know, that it is good for making two (or more) processes parallel but cannot imagine, how this works. O.K, a simple example to make it clear. There is microcontroller and two processes shall run on it. The first one ANDs two intput-pins and gives the result to an output-pin. The second one ORs two othe...

Hi, i am starting entering on the fixed wing VANT reasearch field, and i was browsing the options for the control system architecture. I could...

Hi, i am starting entering on the fixed wing VANT reasearch field, and i was browsing the options for the control system architecture. I could find two possible ways i could go. A TMS570 microcontroller + Some safe RTOS (SafeRTOS, =ECC/OS-II...), or a PC104 (with non defined processor architecture) + QNX. In most of the cases the last is the one that got much more horsepower, but still is he...

I've been implementing custom devices for stage music use for several years, using small SBCs that run a basic RTOS that I code up myself. The...

I've been implementing custom devices for stage music use for several years, using small SBCs that run a basic RTOS that I code up myself. The input and output is MIDI, coded music tokens (not digitised audio) at a serial data rate of 31.25 KB. Even with the maximum amount of processing involved, latency time between receipt of a byte and its associated transmission was never more than ...

Sorry if this is a FAQ, I have googled around and don''t find much. What to I want from an RTOS? - The standard message/timer/mutex/thread...

Sorry if this is a FAQ, I have googled around and don''t find much. What to I want from an RTOS? - The standard message/timer/mutex/thread stuff - Some sort of abstraction layer, so that I can unit test my code under Linux or Windows before hitting the hardware - Support for a bunch of processors - Easily configurable - Good documentation & support forums - in fact anything that lets m...

Processor is Atmel AT91SAM7XC256 connected by GSM modem. The client has specified "encryption". I think it needs a formal RTOS and Secure...

Processor is Atmel AT91SAM7XC256 connected by GSM modem. The client has specified "encryption". I think it needs a formal RTOS and Secure Shell; client says "get it working ASAP first and we'll add encryption later." Any recommendations? btw the eCosPro SSH middleware seems to be server only, not client. TIA, Sean_Q_

hello, i am evaluating various rtos for on of our products based on arm7. i have been looking at Nucleus, embOS, Rtxc, Threadx and MicroC...

hello, i am evaluating various rtos for on of our products based on arm7. i have been looking at Nucleus, embOS, Rtxc, Threadx and MicroC os-ii. Of the lot Threadx and embOS seem to be good. Although i believe that the others are just as good. It seems hard to zero in one choice. I have been searching for reviews in the newsgroups. I have found some scattered info for nucleus and threadx (...

Hi there, Currently, i am working on porting the Protocol stack of UTMS to eCos RTOS using x86 processor. I have a problem in with the...

Hi there, Currently, i am working on porting the Protocol stack of UTMS to eCos RTOS using x86 processor. I have a problem in with the message Queues.Our system suppost the Message queues as it is provided in the Xenomai RTOS.I.e. rt_queue_create() . Though i know,how to design my own to work with it; but i need some bult in soultion. Regards, Engr. Jawad Rehman Embedded Software Engi...

Folks, Does anyone have any expirence porting Nucleus on a non-MMU based processor ? What are some of the issues and/or challenges in doing...

Folks, Does anyone have any expirence porting Nucleus on a non-MMU based processor ? What are some of the issues and/or challenges in doing this. Appreciate some inputs as we are investigating supporting Nucleus RTOS for our products Thnaks

Hi, I got an interesting information from internet and i have some queries based on it as it is really strange/unbeleivable . " In a...

Hi, I got an interesting information from internet and i have some queries based on it as it is really strange/unbeleivable . " In a preemptive priority based RTOS, priority inversion problem is among the major sources of deadline violations. Priority inheritance protocol is one of the approaches to reduce priority inversion. Unfortunately, RTOS like uC/OS can't support priority inherita...

Hi folk, We were designing an RTOS for a general 8 bit microcontroller. We have designed a round robin schedular. But i have question...

Hi folk, We were designing an RTOS for a general 8 bit microcontroller. We have designed a round robin schedular. But i have question about the stack on 8051. My doubt is, we have our kernel (data, code) and also applications (data and code) Now we need to allocate seperate memory areas for the kernel and the application. How do we take care of the security in 8051. And als...

Hi all I'm working on a small embedded project which runs under a simple RTOS. The Hardware includes a scanned keyboard, LCD display,...

Hi all I'm working on a small embedded project which runs under a simple RTOS. The Hardware includes a scanned keyboard, LCD display, and various motors & switches etc. The User Interface requirements call for various commands and navigation within the menu system to be selected by means of combinations of keys, and/or keys being pressed for a longer period of time. Something like "pr...

Hi RTOSians, I am a newbie to the world of RTOS programming( vxworks,psos ). I came to know from one post here that there is some code shipped...

Hi RTOSians, I am a newbie to the world of RTOS programming( vxworks,psos ). I came to know from one post here that there is some code shipped with psos which is a good place to start for learning. I wanted to compile this code on our board here. I donot have access to this code. we have psos and arm combo here. If anybody has these examples please pass it on to me, I have enquired in my ...

I would like to see recommendations on existing OSS or free RTOS (with 32 bit ARM, PowerPC and x86 targets). I think it is important to have...

I would like to see recommendations on existing OSS or free RTOS (with 32 bit ARM, PowerPC and x86 targets). I think it is important to have a free-as-in-beer license for training/trial purposes as well as possibly a commercial version to actually ship products and get support. Please discuss "performance" and ease of use. Not really interested in Linux (too big). 1) RTEMS http:...

Hello all, We are looking for very reliable freeware for the ARM7 microcontroller (NXP). The target application is for proffesional use which...

Hello all, We are looking for very reliable freeware for the ARM7 microcontroller (NXP). The target application is for proffesional use which sets high requirements for reliability. The product is very cost-sensitive which has made us looking for freeware alternatives to the commercial/proffessional RTOS and TCP/IP stacks. We are currently considering: http://www.sics.se/~adam/uip...

HI can anyone suggest 1. where I can locate Embedded RTOS training materials 2. a qualified VxWorks trainer with his own materials thanks...

HI can anyone suggest 1. where I can locate Embedded RTOS training materials 2. a qualified VxWorks trainer with his own materials thanks Sophie

Hi, I am new to nucleus RTOS. I am using nucleus PLUS 1.3 and source is already manipulated for our product development. I am trying to...

Hi, I am new to nucleus RTOS. I am using nucleus PLUS 1.3 and source is already manipulated for our product development. I am trying to implement a simple UDP client and server . But i couldnt find any socket APIs(example- NU_Socket..but it is in the new version[i dont have it]). However i found the following two in nucleus source code which i use. void udp_rcv(packet *p, void *cookie) v...