ChibiOS Free Embedded RTOS

Thanks Giovanni, I also noticed that there used to be chEvtWaitAnyTimeoutS in NIL but it got removed during the RT4/NIL2 merge - is this because RT did not have such a function? I found it useful when I needed to wait on either a mailbox message or an event - I could raise an event and send a messag...

When sleeping in a locked state (using S-class functions), interrupts are re-enabled when the thread is switched out, and disabled again when the thread is switched back in. (More properly, the system lock is released - this may or may not be the same as "interrupts" on all platforms, henc...

Hi all, RT events have three straightforward ways to wait for events - EvtWaitAny, EvtWaitAll, and EvtWaitOne. NIL events have only EvtWaitAny. In looking at the code it seems very easy to add support for WaitOne and WaitAll - is there a reason to leave these out from NIL? I understand RT events are...

The NIL OSAL (osal.h) contains a typedef for the eventflags_t type, which has been moved into chtypes.h. This still works on the STM32 chips because the NIL typedef is for a uint32_t and that's what eventflags_t is for STM32, but it may not be for other ports and it's fragile if that type changes in...

Anyway, those functions can be called from ISR, for example to see which thread has been preempted by the ISR for statistics. This is an excellent point that I hadn't considered. I was just thinking that perhaps I was wrong, or that if they had no use (and in fact were dangerous) in ISRs that perha...

Thanks for your help, Giovanni, the mailboxes + pools approach is working great . I am really grateful that you decided to share code between RT and NIL for these things and for binary semaphores, a lot of RTOS writers would not have bothered

Why are calls like chThdGetSelfX() and chThdGetPriorityX() X-class APIs? I don't understand how they would have a well-defined meaning in an ISR context. Is it because there isn't a class defined for "you can call this outside lock zones but not in ISRs"? Or am I just confused and they act...

Hi all, I have an application with an architecture similar to the Actor model ( Wiki link ) where a queue of fixed-length buffers ("messages") is processed one at a time by a worker thread. I am trying to understand the best way to do this in ChibiOS (specifically NIL, although I'd conside...

As another alternative, I was able to put together something to do this in about an hour using clang-format.

Hi all, In creating a UART driver for my MSP430X port of ChibiOS, I've run into the following problem. In the helper macro for calling the RX complete ISR, _uart_rx_complete_isr_code, there is a call to a function uart_enter_rx_idle_loop. This is a local (static) method of the STM32 UART port. Obvio...