ChibiOS Free Embedded RTOS

The actual diff on my end is below. I was missing the dmaStreamClearInterrupt(wspip->dma) - which was added in the last month as a bug fix. However, that didn't fix the problem. I kept that, but removed the errata handling and added back the dmaStreamDisable from the previous revision. That seems to...

I checked all the errata for the L4 series (https://www.st.com/en/microcontrollers-microprocessors/stm32l4-series.html#documentation). There are 12 errata published for the different devices in the series. Below is the applicable patch targeting those devices that have the "Extra data written i...

The fix here: https://forum.chibios.org/viewtopic.php?f=35&t=5602 , is not applicable to L496. The errata sheets are different with regards to QSPI for L476/486 and L496 . I tested with and without the errata patch applied, and using the version that 'addresses' the errata doesn't work on L496. ...

Add STM32_WSPI_QUADSPI1_PRESCALER_VALUE to the updater. diff --git a/ChibiOS_20.x.x/tools/ftl/processors/conf/mcuconf_stm32l496xx/mcuconf.h.ftl b/ChibiOS_20.x.x/tools/ftl/processors/conf/mcuconf_stm32l496xx/mcuconf.h.ftl index e6a3f3a57..bdcb294ae 100644 --- a/ChibiOS_20.x.x/tools/ftl/processors/con...

I did some more digging around with git bisect, and I found the offending commit:

https://osdn.net/projects/chibios/scm/svn/commits/13496

I'm guessing it has something to do with moving around the struct port_context in the thread structure.

The simulator is segfaulting at the tip of development branch, but works fine in stable_20.3.x.

The segfault seems to happen in the context switch..

Giovanni wrote:The drawback would be that the timer object would become larger.

This could be mitigated with a compile time kernel option to enable virtual timers to be optionally configured as periodic timers.

Hi, This is a good point, VTs have been designed as one-shot timers only and, when using high resolution time, there could be an accumulating error. Perhaps VTs should have a periodic mode built-in, without having to reload the timer from the callback. The drawback would be that the timer object wo...

I took at a look at ChibiOS/os/various/evtimer.c, and it implements the last idea presented here using virtual timers: http://www.chibios.org/dokuwiki/doku.php?id=chibios:kb:timing The issue is that the timing will always be off due to the execution time it takes to get to the place where the one sh...

Thanks for looking into it. I believe it should have been here:
http://chibiforge.org/doc/20.3/rt/concepts.html