mirror of
https://github.com/espressif/esp-idf.git
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90 lines
2.2 KiB
C
90 lines
2.2 KiB
C
/*
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* SPDX-FileCopyrightText: 2015-2022 Espressif Systems (Shanghai) CO LTD
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <stdbool.h>
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#include "esp_private/system_internal.h"
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#include "esp_private/rtc_ctrl.h"
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#include "esp_rom_sys.h"
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#include "soc/soc.h"
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#include "esp_cpu.h"
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#include "soc/rtc_periph.h"
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#include "hal/cpu_hal.h"
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#include "hal/brownout_hal.h"
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#include "sdkconfig.h"
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#if defined(CONFIG_ESP_BROWNOUT_DET_LVL)
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#define BROWNOUT_DET_LVL CONFIG_ESP_BROWNOUT_DET_LVL
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#else
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#define BROWNOUT_DET_LVL 0
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#endif
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#if SOC_BROWNOUT_RESET_SUPPORTED
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#define BROWNOUT_RESET_EN true
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#else
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#define BROWNOUT_RESET_EN false
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#endif // SOC_BROWNOUT_RESET_SUPPORTED
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#ifndef SOC_BROWNOUT_RESET_SUPPORTED
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static void rtc_brownout_isr_handler(void *arg)
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{
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/* Normally RTC ISR clears the interrupt flag after the application-supplied
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* handler returns. Since restart is called here, the flag needs to be
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* cleared manually.
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*/
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brownout_hal_intr_clear();
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/* Stall the other CPU to make sure the code running there doesn't use UART
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* at the same time as the following esp_rom_printf.
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*/
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esp_cpu_stall(!cpu_hal_get_core_id());
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esp_reset_reason_set_hint(ESP_RST_BROWNOUT);
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esp_rom_printf("\r\nBrownout detector was triggered\r\n\r\n");
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esp_restart_noos();
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}
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#endif // not SOC_BROWNOUT_RESET_SUPPORTED
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void esp_brownout_init(void)
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{
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brownout_hal_config_t cfg = {
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.threshold = BROWNOUT_DET_LVL,
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.enabled = true,
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.reset_enabled = BROWNOUT_RESET_EN,
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.flash_power_down = true,
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.rf_power_down = true,
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};
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brownout_hal_config(&cfg);
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#ifndef SOC_BROWNOUT_RESET_SUPPORTED
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rtc_isr_register(rtc_brownout_isr_handler, NULL, RTC_CNTL_BROWN_OUT_INT_ENA_M);
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brownout_hal_intr_enable(true);
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#endif // not SOC_BROWNOUT_RESET_SUPPORTED
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}
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void esp_brownout_disable(void)
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{
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brownout_hal_config_t cfg = {
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.enabled = false,
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};
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brownout_hal_config(&cfg);
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#ifndef SOC_BROWNOUT_RESET_SUPPORTED
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brownout_hal_intr_enable(false);
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rtc_isr_deregister(rtc_brownout_isr_handler, NULL);
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#endif // not SOC_BROWNOUT_RESET_SUPPORTED
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}
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