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esp-idf/components/esp_rom/include/esp32s2/rom/rtc.h

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// Copyright 2010-2016 Espressif Systems (Shanghai) PTE LTD
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#ifndef _ROM_RTC_H_
#define _ROM_RTC_H_
#include "ets_sys.h"
#include <stdbool.h>
#include <stdint.h>
#include "esp_assert.h"
#include "soc/soc.h"
#include "soc/rtc_cntl_reg.h"
#include "soc/reset_reasons.h"
#ifdef __cplusplus
extern "C" {
#endif
/** \defgroup rtc_apis, rtc registers and memory related apis
* @brief rtc apis
*/
/** @addtogroup rtc_apis
* @{
*/
/**************************************************************************************
* Note: *
* Some Rtc memory and registers are used, in ROM or in internal library. *
* Please do not use reserved or used rtc memory or registers. *
* *
*************************************************************************************
* RTC Memory & Store Register usage
*************************************************************************************
* rtc memory addr type size usage
* 0x3f421000(0x50000000) Slow SIZE_CP Co-Processor code/Reset Entry
* 0x3f421000+SIZE_CP Slow 8192-SIZE_CP
*
* 0x3ff80000(0x40070000) Fast 8192 deep sleep entry code
*
*************************************************************************************
* RTC store registers usage
* RTC_CNTL_STORE0_REG Reserved
* RTC_CNTL_STORE1_REG RTC_SLOW_CLK calibration value
* RTC_CNTL_STORE2_REG Boot time, low word
* RTC_CNTL_STORE3_REG Boot time, high word
* RTC_CNTL_STORE4_REG External XTAL frequency
* RTC_CNTL_STORE5_REG APB bus frequency
* RTC_CNTL_STORE6_REG FAST_RTC_MEMORY_ENTRY
* RTC_CNTL_STORE7_REG FAST_RTC_MEMORY_CRC
*************************************************************************************
*/
#define RTC_SLOW_CLK_CAL_REG RTC_CNTL_STORE1_REG
#define RTC_BOOT_TIME_LOW_REG RTC_CNTL_STORE2_REG
#define RTC_BOOT_TIME_HIGH_REG RTC_CNTL_STORE3_REG
#define RTC_XTAL_FREQ_REG RTC_CNTL_STORE4_REG
#define RTC_APB_FREQ_REG RTC_CNTL_STORE5_REG
#define RTC_ENTRY_ADDR_REG RTC_CNTL_STORE6_REG
#define RTC_RESET_CAUSE_REG RTC_CNTL_STORE6_REG
#define RTC_MEMORY_CRC_REG RTC_CNTL_STORE7_REG
#define RTC_DISABLE_ROM_LOG ((1 << 0) | (1 << 16)) //!< Disable logging from the ROM code.
typedef enum {
AWAKE = 0, //<CPU ON
LIGHT_SLEEP = BIT0, //CPU waiti, PLL ON. We don't need explicitly set this mode.
DEEP_SLEEP = BIT1 //CPU OFF, PLL OFF, only specific timer could wake up
} SLEEP_MODE;
typedef enum {
NO_MEAN = 0,
POWERON_RESET = 1, /**<1, Vbat power on reset*/
RTC_SW_SYS_RESET = 3, /**<3, Software reset digital core*/
DEEPSLEEP_RESET = 5, /**<5, Deep Sleep reset digital core*/
TG0WDT_SYS_RESET = 7, /**<7, Timer Group0 Watch dog reset digital core*/
TG1WDT_SYS_RESET = 8, /**<8, Timer Group1 Watch dog reset digital core*/
RTCWDT_SYS_RESET = 9, /**<9, RTC Watch dog Reset digital core*/
INTRUSION_RESET = 10, /**<10, Instrusion tested to reset CPU*/
TG0WDT_CPU_RESET = 11, /**<11, Time Group0 reset CPU*/
RTC_SW_CPU_RESET = 12, /**<12, Software reset CPU*/
RTCWDT_CPU_RESET = 13, /**<13, RTC Watch dog Reset CPU*/
RTCWDT_BROWN_OUT_RESET = 15, /**<15, Reset when the vdd voltage is not stable*/
RTCWDT_RTC_RESET = 16, /**<16, RTC Watch dog reset digital core and rtc module*/
TG1WDT_CPU_RESET = 17, /**<17, Time Group1 reset CPU*/
SUPER_WDT_RESET = 18, /**<18, super watchdog reset digital core and rtc module*/
GLITCH_RTC_RESET = 19, /**<19, glitch reset digital core and rtc module*/
EFUSE_RESET = 20, /**<20, efuse reset digital core*/
} RESET_REASON;
// Check if the reset reason defined in ROM is compatible with soc/reset_reasons.h
ESP_STATIC_ASSERT((soc_reset_reason_t)POWERON_RESET == RESET_REASON_CHIP_POWER_ON, "POWERON_RESET != RESET_REASON_CHIP_POWER_ON");
ESP_STATIC_ASSERT((soc_reset_reason_t)RTC_SW_SYS_RESET == RESET_REASON_CORE_SW, "RTC_SW_SYS_RESET != RESET_REASON_CORE_SW");
ESP_STATIC_ASSERT((soc_reset_reason_t)DEEPSLEEP_RESET == RESET_REASON_CORE_DEEP_SLEEP, "DEEPSLEEP_RESET != RESET_REASON_CORE_DEEP_SLEEP");
ESP_STATIC_ASSERT((soc_reset_reason_t)TG0WDT_SYS_RESET == RESET_REASON_CORE_MWDT0, "TG0WDT_SYS_RESET != RESET_REASON_CORE_MWDT0");
ESP_STATIC_ASSERT((soc_reset_reason_t)TG1WDT_SYS_RESET == RESET_REASON_CORE_MWDT1, "TG1WDT_SYS_RESET != RESET_REASON_CORE_MWDT1");
ESP_STATIC_ASSERT((soc_reset_reason_t)RTCWDT_SYS_RESET == RESET_REASON_CORE_RTC_WDT, "RTCWDT_SYS_RESET != RESET_REASON_CORE_RTC_WDT");
ESP_STATIC_ASSERT((soc_reset_reason_t)TG0WDT_CPU_RESET == RESET_REASON_CPU0_MWDT0, "TG0WDT_CPU_RESET != RESET_REASON_CPU0_MWDT0");
ESP_STATIC_ASSERT((soc_reset_reason_t)RTC_SW_CPU_RESET == RESET_REASON_CPU0_SW, "RTC_SW_CPU_RESET != RESET_REASON_CPU0_SW");
ESP_STATIC_ASSERT((soc_reset_reason_t)RTCWDT_CPU_RESET == RESET_REASON_CPU0_RTC_WDT, "RTCWDT_CPU_RESET != RESET_REASON_CPU0_RTC_WDT");
ESP_STATIC_ASSERT((soc_reset_reason_t)RTCWDT_BROWN_OUT_RESET == RESET_REASON_SYS_BROWN_OUT, "RTCWDT_BROWN_OUT_RESET != RESET_REASON_SYS_BROWN_OUT");
ESP_STATIC_ASSERT((soc_reset_reason_t)RTCWDT_RTC_RESET == RESET_REASON_SYS_RTC_WDT, "RTCWDT_RTC_RESET != RESET_REASON_SYS_RTC_WDT");
ESP_STATIC_ASSERT((soc_reset_reason_t)TG1WDT_CPU_RESET == RESET_REASON_CPU0_MWDT1, "TG1WDT_CPU_RESET != RESET_REASON_CPU0_MWDT1");
ESP_STATIC_ASSERT((soc_reset_reason_t)SUPER_WDT_RESET == RESET_REASON_SYS_SUPER_WDT, "SUPER_WDT_RESET != RESET_REASON_SYS_SUPER_WDT");
ESP_STATIC_ASSERT((soc_reset_reason_t)GLITCH_RTC_RESET == RESET_REASON_SYS_CLK_GLITCH, "GLITCH_RTC_RESET != RESET_REASON_SYS_CLK_GLITCH");
ESP_STATIC_ASSERT((soc_reset_reason_t)EFUSE_RESET == RESET_REASON_CORE_EFUSE_CRC, "EFUSE_RESET != RESET_REASON_CORE_EFUSE_CRC");
typedef enum {
NO_SLEEP = 0,
EXT_EVENT0_TRIG = BIT0,
EXT_EVENT1_TRIG = BIT1,
GPIO_TRIG = BIT2,
TIMER_EXPIRE = BIT3,
SDIO_TRIG = BIT4,
MAC_TRIG = BIT5,
UART0_TRIG = BIT6,
UART1_TRIG = BIT7,
TOUCH_TRIG = BIT8,
SAR_TRIG = BIT9,
BT_TRIG = BIT10,
RISCV_TRIG = BIT11,
XTAL_DEAD_TRIG = BIT12,
RISCV_TRAP_TRIG = BIT13,
USB_TRIG = BIT14
} WAKEUP_REASON;
typedef enum {
DISEN_WAKEUP = NO_SLEEP,
EXT_EVENT0_TRIG_EN = EXT_EVENT0_TRIG,
EXT_EVENT1_TRIG_EN = EXT_EVENT1_TRIG,
GPIO_TRIG_EN = GPIO_TRIG,
TIMER_EXPIRE_EN = TIMER_EXPIRE,
SDIO_TRIG_EN = SDIO_TRIG,
MAC_TRIG_EN = MAC_TRIG,
UART0_TRIG_EN = UART0_TRIG,
UART1_TRIG_EN = UART1_TRIG,
TOUCH_TRIG_EN = TOUCH_TRIG,
SAR_TRIG_EN = SAR_TRIG,
BT_TRIG_EN = BT_TRIG,
RISCV_TRIG_EN = RISCV_TRIG,
XTAL_DEAD_TRIG_EN = XTAL_DEAD_TRIG,
RISCV_TRAP_TRIG_EN = RISCV_TRAP_TRIG,
USB_TRIG_EN = USB_TRIG
} WAKEUP_ENABLE;
/**
* @brief Get the reset reason for CPU.
*
* @param int cpu_no : CPU no.
*
* @return RESET_REASON
*/
RESET_REASON rtc_get_reset_reason(int cpu_no);
/**
* @brief Get the wakeup cause for CPU.
*
* @param int cpu_no : CPU no.
*
* @return WAKEUP_REASON
*/
WAKEUP_REASON rtc_get_wakeup_cause(void);
/**
* @brief Get CRC for Fast RTC Memory.
*
* @param uint32_t start_addr : 0 - 0x7ff for Fast RTC Memory.
*
* @param uint32_t crc_len : 0 - 0x7ff, 0 for 4 byte, 0x7ff for 0x2000 byte.
*
* @return uint32_t : CRC32 result
*/
uint32_t calc_rtc_memory_crc(uint32_t start_addr, uint32_t crc_len);
/**
* @brief Set CRC of Fast RTC memory 0-0x7ff into RTC STORE7.
*
* @param None
*
* @return None
*/
void set_rtc_memory_crc(void);
/**
* @brief Suppress ROM log by setting specific RTC control register.
* @note This is not a permanent disable of ROM logging since the RTC register can not retain after chip reset.
*
* @param None
*
* @return None
*/
static inline void rtc_suppress_rom_log(void)
{
/* To disable logging in the ROM, only the least significant bit of the register is used,
* but since this register is also used to store the frequency of the main crystal (RTC_XTAL_FREQ_REG),
* you need to write to this register in the same format.
* Namely, the upper 16 bits and lower should be the same.
*/
REG_SET_BIT(RTC_CNTL_STORE4_REG, RTC_DISABLE_ROM_LOG);
}
/**
* @brief Fetch entry from RTC memory and RTC STORE reg
*
* @param uint32_t * entry_addr : the address to save entry
*
* @param RESET_REASON reset_reason : reset reason this time
*
* @return None
*/
void rtc_boot_control(uint32_t * entry_addr, RESET_REASON reset_reason);
/**
* @brief Software Reset digital core.
*
* It is not recommended to use this function in esp-idf, use
* esp_restart() instead.
*
* @param None
*
* @return None
*/
void software_reset(void);
/**
* @brief Software Reset digital core.
*
* It is not recommended to use this function in esp-idf, use
* esp_restart() instead.
*
* @param int cpu_no : The CPU to reset, 0 for PRO CPU, 1 for APP CPU.
*
* @return None
*/
void software_reset_cpu(int cpu_no);
/**
* @}
*/
#ifdef __cplusplus
}
#endif
#endif /* _ROM_RTC_H_ */
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