mirror of
https://github.com/espressif/esp-idf.git
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45 lines
1.3 KiB
C
45 lines
1.3 KiB
C
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// Copyright 2015-2020 Espressif Systems (Shanghai) PTE LTD
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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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#include "esp_attr.h"
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#include "freertos/FreeRTOS.h"
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#include "freertos/portmacro.h"
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#include "esp32c3/rom/apb_dma.h"
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static portMUX_TYPE apb_backup_mutex = portMUX_INITIALIZER_UNLOCKED;
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static void IRAM_ATTR apb_backup_lock(void)
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{
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if (xPortInIsrContext()) {
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portENTER_CRITICAL_ISR(&apb_backup_mutex);
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} else {
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portENTER_CRITICAL(&apb_backup_mutex);
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}
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}
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static void IRAM_ATTR apb_backup_unlock(void)
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{
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if (xPortInIsrContext()) {
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portEXIT_CRITICAL_ISR(&apb_backup_mutex);
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} else {
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portEXIT_CRITICAL(&apb_backup_mutex);
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}
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}
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void esp_apb_backup_lock_init(void)
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{
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ets_apb_backup_init_lock_func(apb_backup_lock, apb_backup_unlock);
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}
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