/** @addtogroup pwr_file @author @htmlonly © @endhtmlonly 2012 Ken Sarkies */ /* * This file is part of the libopencm3 project. * * Copyright (C) 2012 Ken Sarkies * * 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 . */ /**@{*/ #include /*---------------------------------------------------------------------------*/ /** @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; } /**@}*/