1 // Copyright 2020 Espressif Systems (Shanghai) PTE LTD 2 // 3 // Licensed under the Apache License, Version 2.0 (the "License"); 4 // you may not use this file except in compliance with the License. 5 // You may obtain a copy of the License at 6 // 7 // http://www.apache.org/licenses/LICENSE-2.0 8 // 9 // Unless required by applicable law or agreed to in writing, software 10 // distributed under the License is distributed on an "AS IS" BASIS, 11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 // See the License for the specific language governing permissions and 13 // limitations under the License. 14 15 #include "soc/rtc.h" 16 17 #ifdef __cplusplus 18 extern "C" { 19 #endif 20 21 /** 22 * @brief This function is used to enable the digital 8m rtc clock, 23 * to support the peripherals. 24 * 25 * @note If this function is called a number of times, the `periph_rtc_dig_clk8m_disable` 26 * function needs to be called same times to disable. 27 * 28 * @return true: success for enable the rtc 8M clock, false: rtc 8M clock enable failed 29 */ 30 bool periph_rtc_dig_clk8m_enable(void); 31 32 /** 33 * @brief This function is used to disable the rtc digital clock, which should be called 34 * with the `periph_rtc_dig_clk8m_enable` pairedly 35 * 36 * @note If this function is called a number of times, the `periph_rtc_dig_clk8m_disable` 37 * function needs to be called same times to disable. 38 */ 39 void periph_rtc_dig_clk8m_disable(void); 40 41 /** 42 * @brief This function is used to get the real clock frequency value of the rtc clock 43 * 44 * @return The real clock value 45 */ 46 uint32_t periph_rtc_dig_clk8m_get_freq(void); 47 48 #ifdef __cplusplus 49 } 50 #endif 51