pm.c
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/*
* Copyright (C) 2016 Kaspar Schleiser <kaspar@schleiser.de>
* 2015 Freie Universität Berlin
* 2015 Engineering-Spirit
*
* This file is subject to the terms and conditions of the GNU Lesser
* General Public License v2.1. See the file LICENSE in the top level
* directory for more details.
*/
/**
* @ingroup cpu_stm32_common
* @ingroup drivers_periph_pm
* @{
*
* @file
* @brief Implementation of the kernels power management interface
*
* @author Nick v. IJzendoorn <nijzndoorn@engineering-spirit.nl>
* @author Kaspar Schleiser <kaspar@schleiser.de>
* @author Fabian Nack <nack@inf.fu-berlin.de>
*
* @}
*/
#include "irq.h"
#include "periph/pm.h"
#if defined(CPU_FAM_STM32F1) || defined(CPU_FAM_STM32F2) || defined(CPU_FAM_STM32F4)
#include "stmclk.h"
#endif
#define ENABLE_DEBUG (0)
#include "debug.h"
#ifndef PM_STOP_CONFIG
/**
* @brief Define config flags for stop mode
*
* Available values can be found in reference manual, PWR section, register CR.
*/
#define PM_STOP_CONFIG (PWR_CR_LPDS | PWR_CR_FPDS)
#endif
void pm_set(unsigned mode)
{
int deep = 0;
/* I just copied it from stm32f1/2/4, but I suppose it would work for the
* others... /KS */
#if defined(CPU_FAM_STM32F1) || defined(CPU_FAM_STM32F2) || defined(CPU_FAM_STM32F4)
switch (mode) {
case 0:
/* Set PDDS to enter standby mode on deepsleep and clear flags */
PWR->CR |= (PWR_CR_PDDS | PWR_CR_CWUF | PWR_CR_CSBF);
/* Enable WKUP pin to use for wakeup from standby mode */
PWR->CSR |= PWR_CSR_EWUP;
/* Set SLEEPDEEP bit of system control block */
deep = 1;
break;
case 1: /* STM Stop mode */
/* Clear PDDS and LPDS bits to enter stop mode on */
/* deepsleep with voltage regulator on */
PWR->CR &= ~(PWR_CR_PDDS | PWR_CR_LPDS);
PWR->CR |= PM_STOP_CONFIG;
/* Set SLEEPDEEP bit of system control block */
deep = 1;
break;
}
#endif
cortexm_sleep(deep);
#if defined(CPU_FAM_STM32F1) || defined(CPU_FAM_STM32F2) || defined(CPU_FAM_STM32F4)
if (deep) {
/* Re-init clock after STOP */
stmclk_init_sysclk();
}
#endif
}
#if defined(CPU_FAM_STM32F1) || defined(CPU_FAM_STM32F2) || defined(CPU_FAM_STM32F4)
void pm_off(void)
{
irq_disable();
pm_set(0);
}
#endif