45 lines
1.3 KiB
C
45 lines
1.3 KiB
C
// Copyright 2015-2017 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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#pragma once
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/**
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* @file esp_clk_internal.h
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*
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* Private clock-related functions
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*/
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/**
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* @brief Initialize clock-related settings
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*
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* Called from cpu_start.c, not intended to be called from other places.
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* This function configures the CPU clock, RTC slow and fast clocks, and
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* performs RTC slow clock calibration.
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*/
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void esp_clk_init(void);
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/**
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* @brief Disables clock of some peripherals
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*
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* Called from cpu_start.c, not intended to be called from other places.
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* This function disables clock of useless peripherals when cpu starts.
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*/
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void esp_perip_clk_init(void);
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/* Selects an external clock source (32 kHz) for RTC.
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* Only internal use in unit test.
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*/
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void rtc_clk_select_rtc_slow_clk();
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