/* * SPDX-FileCopyrightText: 2015-2022 Espressif Systems (Shanghai) CO LTD * * SPDX-License-Identifier: Apache-2.0 */ #include <stdint.h> #include <stdio.h> #include <stdlib.h> #include <stdbool.h> #include "esp_private/system_internal.h" #include "esp_private/rtc_ctrl.h" #include "esp_private/spi_flash_os.h" #include "esp_rom_sys.h" #include "soc/soc.h" #include "esp_cpu.h" #include "soc/rtc_periph.h" #include "hal/cpu_hal.h" #include "esp_attr.h" #include "bootloader_flash.h" #include "esp_intr_alloc.h" #include "hal/brownout_hal.h" #include "sdkconfig.h" #if defined(CONFIG_ESP_BROWNOUT_DET_LVL) #define BROWNOUT_DET_LVL CONFIG_ESP_BROWNOUT_DET_LVL #else #define BROWNOUT_DET_LVL 0 #endif #if CONFIG_ESP_SYSTEM_BROWNOUT_INTR IRAM_ATTR static void rtc_brownout_isr_handler(void *arg) { /* Normally RTC ISR clears the interrupt flag after the application-supplied * handler returns. Since restart is called here, the flag needs to be * cleared manually. */ brownout_hal_intr_clear(); // Stop the other core. esp_cpu_stall(!cpu_hal_get_core_id()); esp_reset_reason_set_hint(ESP_RST_BROWNOUT); #if CONFIG_SPI_FLASH_BROWNOUT_RESET if (spi_flash_brownout_need_reset()) { bootloader_flash_reset_chip(); } else #endif // CONFIG_SPI_FLASH_BROWNOUT_RESET { esp_rom_printf("\r\nBrownout detector was triggered\r\n\r\n"); } esp_restart_noos(); } #endif // CONFIG_ESP_SYSTEM_BROWNOUT_INTR void esp_brownout_init(void) { #if CONFIG_ESP_SYSTEM_BROWNOUT_INTR brownout_hal_config_t cfg = { .threshold = BROWNOUT_DET_LVL, .enabled = true, .reset_enabled = false, .flash_power_down = true, .rf_power_down = true, }; brownout_hal_config(&cfg); brownout_hal_intr_clear(); rtc_isr_register(rtc_brownout_isr_handler, NULL, RTC_CNTL_BROWN_OUT_INT_ENA_M, RTC_INTR_FLAG_IRAM); brownout_hal_intr_enable(true); #else // brownout without interrupt brownout_hal_config_t cfg = { .threshold = BROWNOUT_DET_LVL, .enabled = true, .reset_enabled = true, .flash_power_down = true, .rf_power_down = true, }; brownout_hal_config(&cfg); #endif } void esp_brownout_disable(void) { brownout_hal_config_t cfg = { .enabled = false, }; brownout_hal_config(&cfg); #if CONFIG_ESP_SYSTEM_BROWNOUT_INTR brownout_hal_intr_enable(false); rtc_isr_deregister(rtc_brownout_isr_handler, NULL); #endif // CONFIG_ESP_SYSTEM_BROWNOUT_INTR }