Hey Oleg,
Are you using the watchdog?
On 27-05-19 07:30, Oleg Artamonov wrote:
Hi
We do. On STM32L0, STM32L1, nRF52, etc.
Checking for interrupt flags is absolutely useless here - 1) WFI
checks for any relevant interrupt flags, 2) interrupt still can happen
between check and WFI.
--
/Sincerely yours,/
/Oleg Artamonov/
/+7 (916) 631-34-90/
/www.unwds.com/ <http://www.unwireddevices.com>
26.05.2019, 18:40, "Kees Bakker" <k...@sodaq.com>:
Hey
Is there anyone using cortexm_sleep for a real application? And if
yes, would you want to share how exactly that's done?
Let me say that I've never written a real application with RIOT, but
I would like to. One of the important requirements is that the app
must be in sleep (deep sleep) and only wake up to do some work.
And another requirement is to use the watchdog.
That said, I'm familiar with the following Arduino pseudo code.
while (forever) {
do stuff
disable interrupts
if !certain condition
__WFI();
enable interrupts
}
That "certain condition" is mostly checking that no WDT or RTC
interrupt
occurred before disabling the interrupts. These interrupts are handled
by ISR's and they set a flag. This is a fairly common thing to do,
I think.
I don't see (or understand) how this can be achieved with RIOT-OS and
cortexm_sleep. It is essential to check the condition AFTER
disabling the
interrupts.
--
Kees Bakker
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