ChibiOS Free Embedded RTOS

It would be good to have an S class versions of the chEvtAddEvents function. I usually use it in a context where I'm already in a chSysLock() state.

Just want to chime in with another vote for lock-less single producer single consumer queues. I was working on a high performance DSP application (on a relatively slow) processor a while back, and lock-less queues saved the day (given the assumption of a single producer, single consumer) along with ...

Giovanni wrote:From here: http://www.chibios.org/dokuwiki/doku.ph ... cles:start

"Articles" from the home page.

Giovanni

Thanks Giovanni!

I found this: http://www.chibios.org/dokuwiki/doku.php?id=chibios:kb:atomic , which describes it pretty well. What I can't find however, is where is that article linked from? I looked in the book (http://www.chibios.org/dokuwiki/doku.php?id=chibios:book:start), but couldn't find it there. From the l...

The operation are *not* atomic if written normally, you need to create an atomic construct this way: chSysLock(); chEvtSignalI(); chMBPostS(); chSysUnlock(); Note the I and the S after function names. You can have several I-class functions and a single final S-class must be present which reschedule...

Hi, You can wait for just events: send an event when posting into the mailbox, the two operations will be atomic. On the thread side wait for the two events (with timeout), when the mailbox event it received then "fetch" messages using TIME_IMMEDIATE until the mailbox is empty, this makes...

Thanks for the reply. If I end up making any changes, I'll be sure to submit them for wider review. Here's a couple of good discussions I've found on the topic for those interested: Cortex-M4(F) Lazy Stacking and Context Switching Application Note 298 http://infocenter.arm.com/help/index.jsp?topic=/...

I was looking thru the ChibiOS and ARM documentation trying to figure out the interrupt latency, and context switch time - and I ran across this: http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.dai0298a/index.html When dealing with systems where the FPU is used by multiple tasks, the con...

Thanks for taking a quick look at it! I appreciate your feedback.

Is there are port for CMSIS-RTOS2 coming out soon?