Arti Zirk
244fdbc35c
subrepo: subdir: "libopencm3" merged: "f5813a54" upstream: origin: "https://github.com/libopencm3/libopencm3" branch: "master" commit: "f5813a54" git-subrepo: version: "0.4.3" origin: "???" commit: "???"
207 lines
5.1 KiB
C
207 lines
5.1 KiB
C
/** @addtogroup pwr_file PWR peripheral API
|
|
@ingroup peripheral_apis
|
|
|
|
@author @htmlonly © @endhtmlonly 2012
|
|
Ken Sarkies <ksarkies@internode.on.net>
|
|
|
|
*/
|
|
/*
|
|
* This file is part of the libopencm3 project.
|
|
*
|
|
* Copyright (C) 2012 Ken Sarkies <ksarkies@internode.on.net>
|
|
*
|
|
* This library is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU Lesser General Public License as published by
|
|
* the Free Software Foundation, either version 3 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This library is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public License
|
|
* along with this library. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
/**@{*/
|
|
|
|
#include <libopencm3/stm32/pwr.h>
|
|
|
|
/*---------------------------------------------------------------------------*/
|
|
/** @brief Disable Backup Domain Write Protection.
|
|
|
|
This allows backup domain registers to be changed. These registers are write
|
|
protected after a reset.
|
|
*/
|
|
|
|
void pwr_disable_backup_domain_write_protect(void)
|
|
{
|
|
PWR_CR |= PWR_CR_DBP;
|
|
}
|
|
|
|
/*---------------------------------------------------------------------------*/
|
|
/** @brief Re-enable Backup Domain Write Protection.
|
|
|
|
This protects backup domain registers from inadvertent change.
|
|
*/
|
|
|
|
void pwr_enable_backup_domain_write_protect(void)
|
|
{
|
|
PWR_CR &= ~PWR_CR_DBP;
|
|
}
|
|
|
|
/*---------------------------------------------------------------------------*/
|
|
/** @brief Enable Power Voltage Detector.
|
|
|
|
This provides voltage level threshold detection. The result of detection is
|
|
provided in the power voltage detector output flag (see @ref pwr_voltage_high)
|
|
or by setting the EXTI16 interrupt (see datasheet for configuration details).
|
|
|
|
@param[in] pvd_level uint32_t. Taken from @ref pwr_pls.
|
|
*/
|
|
|
|
void pwr_enable_power_voltage_detect(uint32_t pvd_level)
|
|
{
|
|
PWR_CR &= ~PWR_CR_PLS_MASK;
|
|
PWR_CR |= (PWR_CR_PVDE | pvd_level);
|
|
}
|
|
|
|
/*---------------------------------------------------------------------------*/
|
|
/** @brief Disable Power Voltage Detector.
|
|
|
|
*/
|
|
|
|
void pwr_disable_power_voltage_detect(void)
|
|
{
|
|
PWR_CR &= ~PWR_CR_PVDE;
|
|
}
|
|
|
|
/*---------------------------------------------------------------------------*/
|
|
/** @brief Clear the Standby Flag.
|
|
|
|
This is set when the processor returns from a standby mode.
|
|
*/
|
|
|
|
void pwr_clear_standby_flag(void)
|
|
{
|
|
PWR_CR |= PWR_CR_CSBF;
|
|
}
|
|
|
|
/*---------------------------------------------------------------------------*/
|
|
/** @brief Clear the Wakeup Flag.
|
|
|
|
This is set when the processor receives a wakeup signal.
|
|
*/
|
|
|
|
void pwr_clear_wakeup_flag(void)
|
|
{
|
|
PWR_CR |= PWR_CR_CWUF;
|
|
}
|
|
|
|
/*---------------------------------------------------------------------------*/
|
|
/** @brief Set Standby Mode in Deep Sleep.
|
|
|
|
*/
|
|
|
|
void pwr_set_standby_mode(void)
|
|
{
|
|
PWR_CR |= PWR_CR_PDDS;
|
|
}
|
|
|
|
/*---------------------------------------------------------------------------*/
|
|
/** @brief Set Stop Mode in Deep Sleep.
|
|
|
|
*/
|
|
|
|
void pwr_set_stop_mode(void)
|
|
{
|
|
PWR_CR &= ~PWR_CR_PDDS;
|
|
}
|
|
|
|
/*---------------------------------------------------------------------------*/
|
|
/** @brief Voltage Regulator On in Stop Mode.
|
|
|
|
*/
|
|
|
|
void pwr_voltage_regulator_on_in_stop(void)
|
|
{
|
|
PWR_CR &= ~PWR_CR_LPDS;
|
|
}
|
|
|
|
/*---------------------------------------------------------------------------*/
|
|
/** @brief Voltage Regulator Low Power in Stop Mode.
|
|
|
|
*/
|
|
|
|
void pwr_voltage_regulator_low_power_in_stop(void)
|
|
{
|
|
PWR_CR |= PWR_CR_LPDS;
|
|
}
|
|
|
|
/*---------------------------------------------------------------------------*/
|
|
/** @brief Enable Wakeup Pin.
|
|
|
|
The wakeup pin is used for waking the processor from standby mode.
|
|
*/
|
|
|
|
void pwr_enable_wakeup_pin(void)
|
|
{
|
|
PWR_CSR |= PWR_CSR_EWUP;
|
|
}
|
|
|
|
/*---------------------------------------------------------------------------*/
|
|
/** @brief Release Wakeup Pin.
|
|
|
|
The wakeup pin is used for general purpose I/O.
|
|
*/
|
|
|
|
void pwr_disable_wakeup_pin(void)
|
|
{
|
|
PWR_CSR &= ~PWR_CSR_EWUP;
|
|
}
|
|
|
|
/*---------------------------------------------------------------------------*/
|
|
/** @brief Get Voltage Detector Output.
|
|
|
|
The voltage detector threshold must be set when the power voltage detector is
|
|
enabled, see @ref pwr_enable_power_voltage_detect.
|
|
|
|
@returns boolean: TRUE if the power voltage is above the preset voltage
|
|
threshold.
|
|
*/
|
|
|
|
bool pwr_voltage_high(void)
|
|
{
|
|
return !(PWR_CSR & PWR_CSR_PVDO);
|
|
}
|
|
|
|
/*---------------------------------------------------------------------------*/
|
|
/** @brief Get Standby Flag.
|
|
|
|
The standby flag is set when the processor returns from a standby state. It is
|
|
cleared by software (see @ref pwr_clear_standby_flag).
|
|
|
|
@returns boolean: TRUE if the processor was in standby state.
|
|
*/
|
|
|
|
bool pwr_get_standby_flag(void)
|
|
{
|
|
return PWR_CSR & PWR_CSR_SBF;
|
|
}
|
|
|
|
/*---------------------------------------------------------------------------*/
|
|
/** @brief Get Wakeup Flag.
|
|
|
|
The wakeup flag is set when a wakeup event has been received. It is
|
|
cleared by software (see @ref pwr_clear_wakeup_flag).
|
|
|
|
@returns boolean: TRUE if a wakeup event was received.
|
|
*/
|
|
|
|
bool pwr_get_wakeup_flag(void)
|
|
{
|
|
return PWR_CSR & PWR_CSR_WUF;
|
|
}
|
|
/**@}*/
|