diff options
Diffstat (limited to 'nuttx/configs/mikroe-stm32f4/src/up_idle.c')
-rw-r--r-- | nuttx/configs/mikroe-stm32f4/src/up_idle.c | 277 |
1 files changed, 277 insertions, 0 deletions
diff --git a/nuttx/configs/mikroe-stm32f4/src/up_idle.c b/nuttx/configs/mikroe-stm32f4/src/up_idle.c new file mode 100644 index 000000000..915180638 --- /dev/null +++ b/nuttx/configs/mikroe-stm32f4/src/up_idle.c @@ -0,0 +1,277 @@ +/**************************************************************************** + * configs/mikroe_stm32f4/src/up_idle.c + * arch/arm/src/board/up_idle.c + * + * Copyright (C) 2012 Gregory Nutt. All rights reserved. + * Authors: Gregory Nutt <gnutt@nuttx.org> + * Diego Sanchez <dsanchez@nx-engineering.com> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * 3. Neither the name NuttX nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + * + ****************************************************************************/ + +/**************************************************************************** + * Included Files + ****************************************************************************/ + +#include <arch/board/board.h> +#include <nuttx/config.h> + +#include <nuttx/arch.h> +#include <nuttx/clock.h> +#include <nuttx/power/pm.h> + +#include <debug.h> +#include <nuttx/rtc.h> +#include <arch/irq.h> + +#include "up_internal.h" +#include "stm32_pm.h" +#include "stm32_rcc.h" +#include "stm32_exti.h" + +#include "mikroe-stm32f4-internal.h" + +/**************************************************************************** + * Pre-processor Definitions + ****************************************************************************/ +/* Configuration ************************************************************/ +/* Does the board support an IDLE LED to indicate that the board is in the + * IDLE state? + */ + +#if defined(CONFIG_ARCH_LEDS) && defined(LED_IDLE) +# define BEGIN_IDLE() up_ledon(LED_IDLE) +# define END_IDLE() up_ledoff(LED_IDLE) +#else +# define BEGIN_IDLE() +# define END_IDLE() +#endif + +/* Values for the RTC Alarm to wake up from the PM_STANDBY mode */ + +#ifndef CONFIG_PM_ALARM_SEC +# define CONFIG_PM_ALARM_SEC 3 +#endif + +#ifndef CONFIG_PM_ALARM_NSEC +# define CONFIG_PM_ALARM_NSEC 0 +#endif + +/**************************************************************************** + * Private Data + ****************************************************************************/ + +#if defined(CONFIG_PM) && defined(CONFIG_RTC_ALARM) +static void up_alarmcb(void); +#endif + +/**************************************************************************** + * Private Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: up_idlepm + * + * Description: + * Perform IDLE state power management. + * + ****************************************************************************/ + +#ifdef CONFIG_PM +static void up_idlepm(void) +{ +#ifdef CONFIG_RTC_ALARM + struct timespec alarmtime; +#endif + static enum pm_state_e oldstate = PM_NORMAL; + enum pm_state_e newstate; + irqstate_t flags; + int ret; + + /* Decide, which power saving level can be obtained */ + + newstate = pm_checkstate(); + + /* Check for state changes */ + + if (newstate != oldstate) + { + lldbg("newstate= %d oldstate=%d\n", newstate, oldstate); + + flags = irqsave(); + + /* Force the global state change */ + + ret = pm_changestate(newstate); + if (ret < 0) + { + /* The new state change failed, revert to the preceding state */ + + (void)pm_changestate(oldstate); + + /* No state change... */ + + goto errout; + } + + /* Then perform board-specific, state-dependent logic here */ + + switch (newstate) + { + case PM_NORMAL: + { + } + break; + + case PM_IDLE: + { + } + break; + + case PM_STANDBY: + { +#ifdef CONFIG_RTC_ALARM + /* Disable RTC Alarm interrupt */ + +#warning "missing logic" + + /* Configure the RTC alarm to Auto Wake the system */ + +#warning "missing logic" + + /* The tv_nsec value must not exceed 1,000,000,000. That + * would be an invalid time. + */ + +#warning "missing logic" + + /* Set the alarm */ + +#warning "missing logic" +#endif + /* Call the STM32 stop mode */ + + stm32_pmstop(true); + + /* We have been re-awakened by some even: A button press? + * An alarm? Cancel any pending alarm and resume the normal + * operation. + */ + +#ifdef CONFIG_RTC_ALARM +#warning "missing logic" +#endif + /* Resume normal operation */ + + pm_changestate(PM_NORMAL); + newstate = PM_NORMAL; + } + break; + + case PM_SLEEP: + { + /* We should not return from standby mode. The only way out + * of standby is via the reset path. + */ + + (void)stm32_pmstandby(); + } + break; + + default: + break; + } + + /* Save the new state */ + + oldstate = newstate; + +errout: + irqrestore(flags); + } +} +#else +# define up_idlepm() +#endif + +/************************************************************************************ + * Name: up_alarmcb + * + * Description: + * RTC alarm service routine + * + ************************************************************************************/ + +#if defined(CONFIG_PM) && defined(CONFIG_RTC_ALARM) +static void up_alarmcb(void) +{ + /* This alarm occurs because there wasn't any EXTI interrupt during the + * PM_STANDBY period. So just go to sleep. + */ + + pm_changestate(PM_SLEEP); +} +#endif + +/**************************************************************************** + * Public Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: up_idle + * + * Description: + * up_idle() is the logic that will be executed when their is no other + * ready-to-run task. This is processor idle time and will continue until + * some interrupt occurs to cause a context switch from the idle task. + * + * Processing in this state may be processor-specific. e.g., this is where + * power management operations might be performed. + * + ****************************************************************************/ + +void up_idle(void) +{ +#if defined(CONFIG_SUPPRESS_INTERRUPTS) || defined(CONFIG_SUPPRESS_TIMER_INTS) + /* If the system is idle and there are no timer interrupts, then process + * "fake" timer interrupts. Hopefully, something will wake up. + */ + + sched_process_timer(); +#else + + /* Perform IDLE mode power management */ + + BEGIN_IDLE(); + up_idlepm(); + END_IDLE(); +#endif +} + |