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	esp_rom: Add initial ESP32-C3 support
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								components/esp_rom/include/esp32c3/rom/rtc.h
									
									
									
									
									
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								components/esp_rom/include/esp32c3/rom/rtc.h
									
									
									
									
									
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// Copyright 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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#ifndef _ROM_RTC_H_
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#define _ROM_RTC_H_
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#include "ets_sys.h"
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#include <stdbool.h>
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#include <stdint.h>
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#include "soc/soc.h"
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#include "soc/rtc_cntl_reg.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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/** \defgroup rtc_apis, rtc registers and memory related apis
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  * @brief rtc apis
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  */
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/** @addtogroup rtc_apis
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  * @{
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  */
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/**************************************************************************************
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  *                                       Note:                                       *
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  *       Some Rtc memory and registers are used, in ROM or in internal library.      *
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  *          Please do not use reserved or used rtc memory or registers.              *
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  *                                                                                   *
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  *************************************************************************************
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  *                          RTC  Memory & Store Register usage
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  *************************************************************************************
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  *     rtc memory addr         type    size            usage
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  *     0x3f421000(0x50000000)  Slow    SIZE_CP         Co-Processor code/Reset Entry
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  *     0x3f421000+SIZE_CP      Slow    8192-SIZE_CP
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  *
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  *     0x3ff80000(0x40070000)  Fast    8192            deep sleep entry code
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  *
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  *************************************************************************************
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  *     RTC store registers     usage
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  *     RTC_CNTL_STORE0_REG     Reserved
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  *     RTC_CNTL_STORE1_REG     RTC_SLOW_CLK calibration value
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  *     RTC_CNTL_STORE2_REG     Boot time, low word
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  *     RTC_CNTL_STORE3_REG     Boot time, high word
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  *     RTC_CNTL_STORE4_REG     External XTAL frequency
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  *     RTC_CNTL_STORE5_REG     APB bus frequency
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  *     RTC_CNTL_STORE6_REG     FAST_RTC_MEMORY_ENTRY
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  *     RTC_CNTL_STORE7_REG     FAST_RTC_MEMORY_CRC
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  *************************************************************************************
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  */
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#define RTC_SLOW_CLK_CAL_REG    RTC_CNTL_STORE1_REG
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#define RTC_BOOT_TIME_LOW_REG   RTC_CNTL_STORE2_REG
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#define RTC_BOOT_TIME_HIGH_REG  RTC_CNTL_STORE3_REG
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#define RTC_XTAL_FREQ_REG       RTC_CNTL_STORE4_REG
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#define RTC_APB_FREQ_REG        RTC_CNTL_STORE5_REG
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#define RTC_ENTRY_ADDR_REG      RTC_CNTL_STORE6_REG
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#define RTC_RESET_CAUSE_REG     RTC_CNTL_STORE6_REG
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#define RTC_MEMORY_CRC_REG      RTC_CNTL_STORE7_REG
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typedef enum {
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    AWAKE = 0,             //<CPU ON
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    LIGHT_SLEEP = BIT0,    //CPU waiti, PLL ON.  We don't need explicitly set this mode.
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    DEEP_SLEEP  = BIT1     //CPU OFF, PLL OFF, only specific timer could wake up
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} SLEEP_MODE;
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typedef enum {
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    NO_MEAN                =  0,
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    POWERON_RESET          =  1,    /**<1, Vbat power on reset*/
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    RTC_SW_SYS_RESET       =  3,    /**<3, Software reset digital core*/
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    DEEPSLEEP_RESET        =  5,    /**<3, Deep Sleep reset digital core*/
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    SDIO_RESET             =  6,    /**<6, Reset by SLC module, reset digital core*/
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    TG0WDT_SYS_RESET       =  7,    /**<7, Timer Group0 Watch dog reset digital core*/
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    TG1WDT_SYS_RESET       =  8,    /**<8, Timer Group1 Watch dog reset digital core*/
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    RTCWDT_SYS_RESET       =  9,    /**<9, RTC Watch dog Reset digital core*/
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    INTRUSION_RESET        = 10,    /**<10, Instrusion tested to reset CPU*/
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    TG0WDT_CPU_RESET       = 11,    /**<11, Time Group0 reset CPU*/
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    RTC_SW_CPU_RESET       = 12,    /**<12, Software reset CPU*/
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    RTCWDT_CPU_RESET       = 13,    /**<13, RTC Watch dog Reset CPU*/
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    RTCWDT_BROWN_OUT_RESET = 15,    /**<15, Reset when the vdd voltage is not stable*/
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    RTCWDT_RTC_RESET       = 16,    /**<16, RTC Watch dog reset digital core and rtc module*/
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    TG1WDT_CPU_RESET       = 17,    /**<11, Time Group1 reset CPU*/
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    SUPER_WDT_RESET        = 18,    /**<11, super watchdog reset digital core and rtc module*/
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} RESET_REASON;
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typedef enum {
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    NO_SLEEP        = 0,
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    EXT_EVENT0_TRIG = BIT0,
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    EXT_EVENT1_TRIG = BIT1,
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    GPIO_TRIG       = BIT2,
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    TIMER_EXPIRE    = BIT3,
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    SDIO_TRIG       = BIT4,
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    MAC_TRIG        = BIT5,
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    UART0_TRIG      = BIT6,
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    UART1_TRIG      = BIT7,
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    TOUCH_TRIG      = BIT8,
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    SAR_TRIG        = BIT9,
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    BT_TRIG         = BIT10,
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    RISCV_TRIG      = BIT11,
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    XTAL_DEAD_TRIG  = BIT12,
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    RISCV_TRAP_TRIG = BIT13,
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    USB_TRIG        = BIT14
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} WAKEUP_REASON;
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typedef enum {
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    DISEN_WAKEUP       = NO_SLEEP,
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    EXT_EVENT0_TRIG_EN = EXT_EVENT0_TRIG,
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    EXT_EVENT1_TRIG_EN = EXT_EVENT1_TRIG,
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    GPIO_TRIG_EN       = GPIO_TRIG,
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    TIMER_EXPIRE_EN    = TIMER_EXPIRE,
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    SDIO_TRIG_EN       = SDIO_TRIG,
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    MAC_TRIG_EN        = MAC_TRIG,
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    UART0_TRIG_EN      = UART0_TRIG,
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    UART1_TRIG_EN      = UART1_TRIG,
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    TOUCH_TRIG_EN      = TOUCH_TRIG,
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    SAR_TRIG_EN        = SAR_TRIG,
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    BT_TRIG_EN         = BT_TRIG,
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    RISCV_TRIG_EN      = RISCV_TRIG,
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    XTAL_DEAD_TRIG_EN  = XTAL_DEAD_TRIG,
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    RISCV_TRAP_TRIG_EN = RISCV_TRAP_TRIG,
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    USB_TRIG_EN        = USB_TRIG
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} WAKEUP_ENABLE;
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/**
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  * @brief  Get the reset reason for CPU.
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  *
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  * @param  int cpu_no : CPU no.
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  *
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  * @return RESET_REASON
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  */
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RESET_REASON rtc_get_reset_reason(int cpu_no);
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/**
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  * @brief  Get the wakeup cause for CPU.
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  *
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  * @param  int cpu_no : CPU no.
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  *
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  * @return WAKEUP_REASON
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  */
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WAKEUP_REASON rtc_get_wakeup_cause(void);
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/**
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  * @brief Get CRC for Fast RTC Memory.
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  *
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  * @param  uint32_t start_addr : 0 - 0x7ff for Fast RTC Memory.
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  *
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  * @param  uint32_t crc_len : 0 - 0x7ff, 0 for 4 byte, 0x7ff for 0x2000 byte.
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  *
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  * @return uint32_t : CRC32 result
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  */
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uint32_t calc_rtc_memory_crc(uint32_t start_addr, uint32_t crc_len);
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/**
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  * @brief Set CRC of Fast RTC memory 0-0x7ff into RTC STORE7.
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  *
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  * @param  None
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  *
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  * @return None
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  */
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void set_rtc_memory_crc(void);
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/**
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  * @brief Fetch entry from RTC memory and RTC STORE reg
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  *
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  * @param uint32_t * entry_addr : the address to save entry
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  *
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  * @param RESET_REASON reset_reason : reset reason this time
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  *
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  * @return None
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  */
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void rtc_boot_control(uint32_t *entry_addr, RESET_REASON reset_reason);
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/**
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  * @brief Software Reset digital core.
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  *
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  * It is not recommended to use this function in esp-idf, use
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  * esp_restart() instead.
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  *
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  * @param  None
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  *
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  * @return None
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  */
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void software_reset(void);
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/**
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  * @brief Software Reset digital core.
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  *
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  * It is not recommended to use this function in esp-idf, use
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  * esp_restart() instead.
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  *
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  * @param  int cpu_no : The CPU to reset, 0 for PRO CPU, 1 for APP CPU.
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  *
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  * @return None
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  */
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void software_reset_cpu(int cpu_no);
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/**
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  * @}
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  */
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#ifdef __cplusplus
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}
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#endif
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#endif /* _ROM_RTC_H_ */
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