stm32f4 __wfi
Christian Mauderer
christian.mauderer at embedded-brains.de
Mon Jun 24 11:01:52 UTC 2019
On 24/06/2019 11:36, Jython wrote:
> now i have changed to RTC wakeup, my key press can wake up the board,
>
> //rtems_stack_checker_report_usage();
>
> PWR_EnterSTOPMode(1, 1);
>
> init_main_osc();
> usleep(100000);
> printf("RCC_CFGR %02x\n", RCC_CFGR & 0xff);
>
>
> so i think sleep function can't be wake up by EXTI
Did you disable some time-specific functionality in your applications
configuration? For example a
CONFIGURE_APPLICATION_DOES_NOT_NEED_CLOCK_DRIVER.
>
>
> On Mon, Jun 24, 2019 at 3:44 PM Christian Mauderer
> <christian.mauderer at embedded-brains.de
> <mailto:christian.mauderer at embedded-brains.de>> wrote:
>
> On 24/06/2019 02:47, Jython wrote:
> > that's to say EXTI wakes up from sleep function because interrupt
> > handler log out
> > but _CPU_Thread_Idle_body does not exit ? want to know what is the
> > sleep/idle exit condition?
>
> The idle task is the task with the lowest priority. So it runs if no
> other higher priority task (basically every task) is in the position to
> run. In your case, your main task has been send to sleep with the
> `sleep(10)` call. It should become active again after 10 seconds.
>
> I vaguely remember that there was something about disabling some timing
> mechanisms in your system. If you disabled the wrong parts, a sleep(10)
> might never wake up again because it's missing it's timer that
> determines whether 10 seconds passed. In that case you might want to
> wait for some synchronization object instead (a signal, a mutex, some
> event, ...) that you send from your interrupt.
>
> PS: I re-added the user list on CC. I hope that is OK for you.
>
> Best regards
>
> Christian
>
> >
> > On Fri, Jun 21, 2019 at 7:09 PM Christian Mauderer
> > <christian.mauderer at embedded-brains.de
> <mailto:christian.mauderer at embedded-brains.de>
> > <mailto:christian.mauderer at embedded-brains.de
> <mailto:christian.mauderer at embedded-brains.de>>> wrote:
> >
> > On 21/06/2019 11:53, Jython wrote:
> > > i got it , i have coded some low power applications with
> > stm32cube last
> > > year,
> > > may i just want to know more about the sleep and why it does not
> > stop by
> > > EXTI , maybe i need to rewrite sleep function ?
> >
> > `sleep()` just suspends your current task. So you will reach
> (after a
> > task switch) the idle loop.
> >
> > >
> > > On Fri, Jun 21, 2019 at 3:16 PM Christian Mauderer
> > > <christian.mauderer at embedded-brains.de
> <mailto:christian.mauderer at embedded-brains.de>
> > <mailto:christian.mauderer at embedded-brains.de
> <mailto:christian.mauderer at embedded-brains.de>>
> > > <mailto:christian.mauderer at embedded-brains.de
> <mailto:christian.mauderer at embedded-brains.de>
> > <mailto:christian.mauderer at embedded-brains.de
> <mailto:christian.mauderer at embedded-brains.de>>>> wrote:
> > >
> > > On 21/06/2019 02:58, Jython wrote:
> > > >
> > > > handler
> > https://gist.github.com/goog/7bf5ec55139a3ed43e36be5b2eee318b
> > >
> > > There are some things that I would strongly discourage
> in that
> > interrupt
> > > handler (printk as long as it is not only a temporary debug
> > output,
> > > delay, ...) but it shouldn't be the problem. I assume
> that you
> > already
> > > checked, that you are testing for the right flag in the
> first
> > if. So I
> > > would expect that you get your debug output if your
> interrupt
> > occurs.
> > >
> > > >
> > > > the main loop code
> > > >
> https://gist.github.com/goog/d83786e0eb2c97ad3126ded1987b5078
> > >
> > > Same again: Some details but nothing that I would see as a
> > cause for
> > > your problem.
> > >
> > > >
> > > > when i pressed key, printf("loop begin\n"); does not print
> > immediately
> > > > so the sleep function does not break
> > >
> > > Note that printf is a interrupt driven print. So if you have
> > problems
> > > with _some_ interrupts not waking up your device you
> might not
> > get an
> > > output or maybe only a "l".
> > >
> > > I agree with the mail from "groups chichak.ca
> <http://chichak.ca>
> > <http://chichak.ca> <http://chichak.ca>".
> > > It's a problem that is
> > > very chip specific and not really a RTEMS specific one.
> So it
> > might
> > > would be a good idea to search for "STM32 not waking up"
> in the ST
> > > forums.
> > >
> > > >
> > > >
> > > >
> > > > On Thu, Jun 20, 2019 at 10:47 PM Christian Mauderer
> > > <list at c-mauderer.de <mailto:list at c-mauderer.de>
> <mailto:list at c-mauderer.de <mailto:list at c-mauderer.de>>
> > <mailto:list at c-mauderer.de <mailto:list at c-mauderer.de>
> <mailto:list at c-mauderer.de <mailto:list at c-mauderer.de>>>
> > > > <mailto:list at c-mauderer.de <mailto:list at c-mauderer.de>
> <mailto:list at c-mauderer.de <mailto:list at c-mauderer.de>>
> > <mailto:list at c-mauderer.de <mailto:list at c-mauderer.de>
> <mailto:list at c-mauderer.de <mailto:list at c-mauderer.de>>>>> wrote:
> > > >
> > > > On 20/06/2019 16:43, Jython wrote:
> > > > > sleep function at the ending of loop, the loop
> did not
> > begin
> > > > intermediate
> > > >
> > > > So just that I understand it correctly: Your have
> a loop
> > in a
> > > task that
> > > > sends your processor to sleep at the end of the loop.
> > Then you
> > > wake up
> > > > the processor via an interrupt and the interrupt
> handler is
> > > executed.
> > > > But you don't reach the loop again?
> > > >
> > > > I think I remember some discussion where you
> wanted to put a
> > > sleep into
> > > > your idle loop? Maybe you have a double sleep?
> > > >
> > > > >
> > > > > On Thursday, June 20, 2019, Christian Mauderer
> > > <list at c-mauderer.de <mailto:list at c-mauderer.de>
> <mailto:list at c-mauderer.de <mailto:list at c-mauderer.de>>
> > <mailto:list at c-mauderer.de <mailto:list at c-mauderer.de>
> <mailto:list at c-mauderer.de <mailto:list at c-mauderer.de>>>
> > > > <mailto:list at c-mauderer.de
> <mailto:list at c-mauderer.de> <mailto:list at c-mauderer.de
> <mailto:list at c-mauderer.de>>
> > <mailto:list at c-mauderer.de <mailto:list at c-mauderer.de>
> <mailto:list at c-mauderer.de <mailto:list at c-mauderer.de>>>>
> > > > > <mailto:list at c-mauderer.de
> <mailto:list at c-mauderer.de> <mailto:list at c-mauderer.de
> <mailto:list at c-mauderer.de>>
> > <mailto:list at c-mauderer.de <mailto:list at c-mauderer.de>
> <mailto:list at c-mauderer.de <mailto:list at c-mauderer.de>>>
> > > <mailto:list at c-mauderer.de <mailto:list at c-mauderer.de>
> <mailto:list at c-mauderer.de <mailto:list at c-mauderer.de>>
> > <mailto:list at c-mauderer.de <mailto:list at c-mauderer.de>
> <mailto:list at c-mauderer.de <mailto:list at c-mauderer.de>>>>>> wrote:
> > > > >
> > > > > On 20/06/2019 13:25, Jython wrote:
> > > > > > do have service routine, handler can
> printk log,
> > > > SLEEPONEXIT is 0
> > > > >
> > > > > So your handler is called? But it seems that the
> > processor
> > > > wakes up
> > > > > then. How does the "won't stop sleep mode"
> look like?
> > > > >
> > > > > >
> > > > > > On Thu, Jun 20, 2019 at 5:19 PM Christian
> Mauderer
> > > > > <list at c-mauderer.de
> <mailto:list at c-mauderer.de> <mailto:list at c-mauderer.de
> <mailto:list at c-mauderer.de>>
> > <mailto:list at c-mauderer.de <mailto:list at c-mauderer.de>
> <mailto:list at c-mauderer.de <mailto:list at c-mauderer.de>>>
> > > <mailto:list at c-mauderer.de <mailto:list at c-mauderer.de>
> <mailto:list at c-mauderer.de <mailto:list at c-mauderer.de>>
> > <mailto:list at c-mauderer.de <mailto:list at c-mauderer.de>
> <mailto:list at c-mauderer.de <mailto:list at c-mauderer.de>>>>
> > > > <mailto:list at c-mauderer.de
> <mailto:list at c-mauderer.de> <mailto:list at c-mauderer.de
> <mailto:list at c-mauderer.de>>
> > <mailto:list at c-mauderer.de <mailto:list at c-mauderer.de>
> <mailto:list at c-mauderer.de <mailto:list at c-mauderer.de>>>
> > > <mailto:list at c-mauderer.de <mailto:list at c-mauderer.de>
> <mailto:list at c-mauderer.de <mailto:list at c-mauderer.de>>
> > <mailto:list at c-mauderer.de <mailto:list at c-mauderer.de>
> <mailto:list at c-mauderer.de <mailto:list at c-mauderer.de>>>>>
> > > > > > <mailto:list at c-mauderer.de
> <mailto:list at c-mauderer.de>
> > <mailto:list at c-mauderer.de <mailto:list at c-mauderer.de>>
> <mailto:list at c-mauderer.de <mailto:list at c-mauderer.de>
> > <mailto:list at c-mauderer.de <mailto:list at c-mauderer.de>>>
> > > <mailto:list at c-mauderer.de <mailto:list at c-mauderer.de>
> <mailto:list at c-mauderer.de <mailto:list at c-mauderer.de>>
> > <mailto:list at c-mauderer.de <mailto:list at c-mauderer.de>
> <mailto:list at c-mauderer.de <mailto:list at c-mauderer.de>>>>
> > > > <mailto:list at c-mauderer.de
> <mailto:list at c-mauderer.de> <mailto:list at c-mauderer.de
> <mailto:list at c-mauderer.de>>
> > <mailto:list at c-mauderer.de <mailto:list at c-mauderer.de>
> <mailto:list at c-mauderer.de <mailto:list at c-mauderer.de>>>
> > > <mailto:list at c-mauderer.de <mailto:list at c-mauderer.de>
> <mailto:list at c-mauderer.de <mailto:list at c-mauderer.de>>
> > <mailto:list at c-mauderer.de <mailto:list at c-mauderer.de>
> <mailto:list at c-mauderer.de <mailto:list at c-mauderer.de>>>>>>> wrote:
> > > > > >
> > > > > > On 20/06/2019 10:57, Jython wrote:
> > > > > > > a GPIO EXTI line,
> > > > > > > rtems idle phrase called __wfi, does
> it make
> > > stm32 enter
> > > > > standby mode?
> > > > > > > so key can not wake up it from sleep
> function
> > > > > >
> > > > > > Please take a look at the reference manual
> > of your
> > > chip.
> > > > Most
> > > > > likely
> > > > > > it's "RM0090 Rev 18" but make sure
> that's the
> > > right part
> > > > number:
> > > > > >
> > > > > >
> > > > >
> > >
> https://www.st.com/resource/en/reference_manual/dm00031020.pdf
> > > > >
> > >
> <https://www.st.com/resource/en/reference_manual/dm00031020.pdf>
> > > > > >
> > > > > > On page 127 there is a description of
> "Entering
> > > > low-power mode":
> > > > > >
> > > > > > "Low-power modes are entered by
> the MCU by
> > > executing the
> > > > > WFI (Wait
> > > > > > For Interrupt), or WFE (Wait for
> Event)
> > > instructions, or
> > > > > when the
> > > > > > SLEEPONEXIT bit in the Cortex ®-M4
> with
> > FPU System
> > > > Control
> > > > > > register is set on Return from ISR."
> > > > > >
> > > > > > There is also a description for "Exiting
> > low-power
> > > > mode". For
> > > > > WFI "any
> > > > > > peripheral interrupt acknowledged by the
> > NVIC can wake
> > > > up the
> > > > > device."
> > > > > > So your interrupt has to be set up.
> > > > > >
> > > > > > Your code seems to enable the
> interrupt. But
> > have you
> > > > registered a
> > > > > > interrupt service routine? Otherwise you
> > might get
> > > problems
> > > > > with an
> > > > > > unhandled interrupt on wakeup.
> > > > > >
> > > > > > I only skimmed through the power
> controller
> > > chapter. But it
> > > > > seems that
> > > > > > if you have SLEEPDEEP bit set, you will
> > enter a deeper
> > > > sleep mode
> > > > > > where peripheral clocks can be
> disabled. In that
> > > state it's
> > > > > possible
> > > > > > that only special pins (like the WKUP) can
> > wake up the
> > > > processor
> > > > > > again. Please have a detailed look at that
> > chapter to
> > > > find out all
> > > > > > traps.
> > > > > >
> > > > > > Best regards
> > > > > >
> > > > > > Christian
> > > > > >
> > > > > > >
> > > > > > >
> > > > > > > void keys_init()
> > > > > > > {
> > > > > > > // config gpio
> > > > > > >
> stm32f4_gpio_set_config(&io_key1); //
> > PA12
> > > > > > > stm32f4_gpio_set_config(&io_key2);
> > > > > > >
> stm32f4_gpio_set_config(&io_key3);
> > > > > > > stm32f4_gpio_set_config(&io_key4);
> > > > > > >
> > > > > > >
> > > > > > > // SYSCFGEN and exit map
> > > > > > > (*(uint32_t*)0x40023844) |= 1<<14;
> > > > > > >
> > > > > > > SYSCFG_EXTICR3 = 0;
> > > > > > > SYSCFG_EXTICR4 = 0;
> > > > > > >
> > > > > > >
> > > > > > >
> > > > > > > // EXIT INIT
> > > > > > > EXTI_IMR |= (1<<12);
> > > > > > > EXTI_RTSR |= (1<<12);
> > > > > > >
> > > > > > > EXTI_IMR |= (1<<11);
> > > > > > > EXTI_RTSR |= (1<<11);
> > > > > > >
> > > > > > > EXTI_IMR |= (1<<10);
> > > > > > > EXTI_RTSR |= (1<<10);
> > > > > > >
> > > > > > > EXTI_IMR |= (1<<9);
> > > > > > > EXTI_RTSR |= (1<<9);
> > > > > > >
> > > > > > >
> > > > > > > //NVIC_Init
> > > > > > > //NVIC it group2
> > > > > > >
> > > > > > > SCB_AIRCR = 0x05FA0000 | 0x500;
> > > > > > > // ip Interrupt priority register x
> > > > > > >
> > > > > > > //(*(volatile uint8_t*)0xE000E417) =
> > 0xe0; //23
> > > > > > > //(*(volatile
> uint8_t*)0xE000E428) =
> > > 0xe0; // 40
> > > > > > > (*(volatile
> uint8_t*)0xE000E417) =
> > > 0x50; //23
> > > > > > > (*(volatile
> uint8_t*)0xE000E428) =
> > > 0x50; // 40
> > > > > > >
> > > > > > >
> > > > > > >
> > > > > > > // 23 40 Interrupt set-enable
> register x
> > > (NVIC_ISERx)
> > > > > > > // nvic enable interrupter
> number
> > > > > > > // 0xE000E100
> > > > > > > (*(volatile
> uint32_t*)0xE000E100) |=
> > > (1<<23);
> > > > > > > (*(volatile uint32_t
> *)0xE000E104)
> > |= (1<<
> > > > (40%32));
> > > > > > > }
> > > > > > >
> > > > > > >
> > > > > > > On Thu, Jun 20, 2019 at 4:05 PM
> Christian
> > Mauderer
> > > > > > <list at c-mauderer.de
> <mailto:list at c-mauderer.de>
> > <mailto:list at c-mauderer.de <mailto:list at c-mauderer.de>>
> <mailto:list at c-mauderer.de <mailto:list at c-mauderer.de>
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> > > > > > > <mailto:list at c-mauderer.de
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> <mailto:list at c-mauderer.de <mailto:list at c-mauderer.de>>>>
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> <mailto:list at c-mauderer.de> <mailto:list at c-mauderer.de
> <mailto:list at c-mauderer.de>>
> > <mailto:list at c-mauderer.de <mailto:list at c-mauderer.de>
> <mailto:list at c-mauderer.de <mailto:list at c-mauderer.de>>>
> > > <mailto:list at c-mauderer.de <mailto:list at c-mauderer.de>
> <mailto:list at c-mauderer.de <mailto:list at c-mauderer.de>>
> > <mailto:list at c-mauderer.de <mailto:list at c-mauderer.de>
> <mailto:list at c-mauderer.de <mailto:list at c-mauderer.de>>>>>>>> wrote:
> > > > > > >
> > > > > > > On 20/06/2019 05:28, Jython wrote:
> > > > > > > > hi, it seems that exit key
> interrupt
> > won't
> > > stop
> > > > sleep
> > > > > mode, why?
> > > > > > > >
> > > > > > > > [...]
> > > > > > > >
> > > > > > >
> > > > > > > What do you mean by "exit key
> > interrupt"? I
> > > don't
> > > > know the
> > > > > > STM32F4 that
> > > > > > > well. So please give some more
> details.
> > > > > > >
> > > > > > > I would expect that either only
> specific
> > > interrupt
> > > > > sources can
> > > > > > wake up
> > > > > > > the processor from a deep sleep mode
> > or that
> > > you can
> > > > > configure
> > > > > > which
> > > > > > > peripherals are still active. If
> your
> > "exit key"
> > > > is a GPIO
> > > > > > line with
> > > > > > > interrupt capability you should
> have a
> > look at
> > > > whether the
> > > > > > module is
> > > > > > > still active.
> > > > > > >
> > > > > > > Best regards
> > > > > > >
> > > > > > > Christian
> > > > > > >
> > > > > > >
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> > >
> > > --
> > > --------------------------------------------
> > > embedded brains GmbH
> > > Herr Christian Mauderer
> > > Dornierstr. 4
> > > D-82178 Puchheim
> > > Germany
> > > email: christian.mauderer at embedded-brains.de
> <mailto:christian.mauderer at embedded-brains.de>
> > <mailto:christian.mauderer at embedded-brains.de
> <mailto:christian.mauderer at embedded-brains.de>>
> > > <mailto:christian.mauderer at embedded-brains.de
> <mailto:christian.mauderer at embedded-brains.de>
> > <mailto:christian.mauderer at embedded-brains.de
> <mailto:christian.mauderer at embedded-brains.de>>>
> > > Phone: +49-89-18 94 741 - 18
> > > Fax: +49-89-18 94 741 - 08
> > > PGP: Public key available on request.
> > >
> > > Diese Nachricht ist keine geschäftliche Mitteilung im Sinne
> > des EHUG.
> > >
> >
> > --
> > --------------------------------------------
> > embedded brains GmbH
> > Herr Christian Mauderer
> > Dornierstr. 4
> > D-82178 Puchheim
> > Germany
> > email: christian.mauderer at embedded-brains.de
> <mailto:christian.mauderer at embedded-brains.de>
> > <mailto:christian.mauderer at embedded-brains.de
> <mailto:christian.mauderer at embedded-brains.de>>
> > Phone: +49-89-18 94 741 - 18
> > Fax: +49-89-18 94 741 - 08
> > PGP: Public key available on request.
> >
> > Diese Nachricht ist keine geschäftliche Mitteilung im Sinne
> des EHUG.
> >
>
> --
> --------------------------------------------
> embedded brains GmbH
> Herr Christian Mauderer
> Dornierstr. 4
> D-82178 Puchheim
> Germany
> email: christian.mauderer at embedded-brains.de
> <mailto:christian.mauderer at embedded-brains.de>
> Phone: +49-89-18 94 741 - 18
> Fax: +49-89-18 94 741 - 08
> PGP: Public key available on request.
>
> Diese Nachricht ist keine geschäftliche Mitteilung im Sinne des EHUG.
>
>
>
> _______________________________________________
> users mailing list
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>
--
--------------------------------------------
embedded brains GmbH
Herr Christian Mauderer
Dornierstr. 4
D-82178 Puchheim
Germany
email: christian.mauderer at embedded-brains.de
Phone: +49-89-18 94 741 - 18
Fax: +49-89-18 94 741 - 08
PGP: Public key available on request.
Diese Nachricht ist keine geschäftliche Mitteilung im Sinne des EHUG.
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