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42 lines
1.2 KiB
C
42 lines
1.2 KiB
C
/*
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* Copyright 2024 Google LLC
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "drivers/pwr.h"
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#include "drivers/periph_config.h"
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#include "stm32f7xx.h"
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void pwr_access_backup_domain(bool enable_access) {
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periph_config_enable(PWR, RCC_APB1Periph_PWR);
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if (enable_access) {
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__atomic_or_fetch(&PWR->CR1, PWR_CR1_DBP, __ATOMIC_RELAXED);
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} else {
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__atomic_and_fetch(&PWR->CR1, ~PWR_CR1_DBP, __ATOMIC_RELAXED);
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}
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periph_config_disable(PWR, RCC_APB1Periph_PWR);
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}
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bool pwr_did_boot_from_standby(void) {
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bool result = (PWR->CSR1 & PWR_CSR1_SBF) != 0;
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return result;
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}
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void pwr_clear_boot_from_standby_flag(void) {
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PWR->CR1 |= PWR_CR1_CSBF;
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}
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