esp-idf/components/esp_system/port/include/esp_clk_internal.h

49 lines
977 B
C

/*
* SPDX-FileCopyrightText: 2015-2021 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Apache-2.0
*/
#pragma once
#include "sdkconfig.h"
#ifdef __cplusplus
extern "C" {
#endif
/**
* @file esp_clk_internal.h
*
* Private clock-related functions
*/
/**
* @brief Initialize clock-related settings
*
* Called from cpu_start.c, not intended to be called from other places.
* This function configures the CPU clock, RTC slow and fast clocks, and
* performs RTC slow clock calibration.
*/
void esp_clk_init(void);
/**
* @brief Disables clock of some peripherals
*
* Called from cpu_start.c, not intended to be called from other places.
* This function disables clock of useless peripherals when cpu starts.
*/
void esp_perip_clk_init(void);
#if !CONFIG_IDF_TARGET_ESP32C2
/* Selects an external clock source (32 kHz) for RTC.
* Only internal use in unit test.
*/
void rtc_clk_select_rtc_slow_clk(void);
#endif
#ifdef __cplusplus
}
#endif