Power-Pico/Power_Pico/Core/Src/rtc.c

/* USER CODE BEGIN Header */
/**
  ******************************************************************************
  * @file    rtc.c
  * @brief   This file provides code for the configuration
  *          of the RTC instances.
  ******************************************************************************
  * @attention
  *
  * Copyright (c) 2025 STMicroelectronics.
  * All rights reserved.
  *
  * This software is licensed under terms that can be found in the LICENSE file
  * in the root directory of this software component.
  * If no LICENSE file comes with this software, it is provided AS-IS.
  *
  ******************************************************************************
  */
/* USER CODE END Header */
/* Includes ------------------------------------------------------------------*/
#include "rtc.h"

/* USER CODE BEGIN 0 */

/* USER CODE END 0 */

RTC_HandleTypeDef hrtc;

/* RTC init function */
void MX_RTC_Init(void)
{

  /* USER CODE BEGIN RTC_Init 0 */

  /* USER CODE END RTC_Init 0 */

  /* USER CODE BEGIN RTC_Init 1 */

  /* USER CODE END RTC_Init 1 */

  /** Initialize RTC Only
  */
  hrtc.Instance = RTC;
  hrtc.Init.HourFormat = RTC_HOURFORMAT_24;
  hrtc.Init.AsynchPrediv = 127;
  hrtc.Init.SynchPrediv = 255;
  hrtc.Init.OutPut = RTC_OUTPUT_DISABLE;
  hrtc.Init.OutPutPolarity = RTC_OUTPUT_POLARITY_HIGH;
  hrtc.Init.OutPutType = RTC_OUTPUT_TYPE_OPENDRAIN;
  if (HAL_RTC_Init(&hrtc) != HAL_OK)
  {
    Error_Handler();
  }
  /* USER CODE BEGIN RTC_Init 2 */

  /* USER CODE END RTC_Init 2 */

}

void HAL_RTC_MspInit(RTC_HandleTypeDef* rtcHandle)
{

  RCC_PeriphCLKInitTypeDef PeriphClkInitStruct = {0};
  if(rtcHandle->Instance==RTC)
  {
  /* USER CODE BEGIN RTC_MspInit 0 */

  /* USER CODE END RTC_MspInit 0 */

  /** Initializes the peripherals clock
  */
    PeriphClkInitStruct.PeriphClockSelection = RCC_PERIPHCLK_RTC;
    PeriphClkInitStruct.RTCClockSelection = RCC_RTCCLKSOURCE_LSI;
    if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInitStruct) != HAL_OK)
    {
      Error_Handler();
    }

    /* RTC clock enable */
    __HAL_RCC_RTC_ENABLE();
  /* USER CODE BEGIN RTC_MspInit 1 */

  /* USER CODE END RTC_MspInit 1 */
  }
}

void HAL_RTC_MspDeInit(RTC_HandleTypeDef* rtcHandle)
{

  if(rtcHandle->Instance==RTC)
  {
  /* USER CODE BEGIN RTC_MspDeInit 0 */

  /* USER CODE END RTC_MspDeInit 0 */
    /* Peripheral clock disable */
    __HAL_RCC_RTC_DISABLE();
  /* USER CODE BEGIN RTC_MspDeInit 1 */

  /* USER CODE END RTC_MspDeInit 1 */
  }
}

/* USER CODE BEGIN 1 */

// 存储参考时间的时间戳（秒数）
static uint32_t s_ReferenceTimestamp = 0;

/**
 * @brief  设定参考时间：从现在开始计时
 *         调用此函数后，计时器清零，重新开始
 */
void SetReferenceTime(void)
{
    RTC_TimeTypeDef sTime = {0};
    RTC_DateTypeDef sDate = {0};

    // 获取当前RTC时间
    HAL_RTC_GetTime(&hrtc, &sTime, RTC_FORMAT_BIN);
    HAL_RTC_GetDate(&hrtc, &sDate, RTC_FORMAT_BIN);

    // 转换为总秒数（简化计算，仅用于计时差）
    s_ReferenceTimestamp =
        (sDate.Year * 365 + sDate.Month * 31 + sDate.Date) * 24 * 3600 +
        sTime.Hours * 3600 +
        sTime.Minutes * 60 +
        sTime.Seconds;
}

/**
 * @brief  获取从参考时间到现在经过的时间（时:分:秒）
 * @param  hours   [out] 经过的小时数
 * @param  minutes [out] 经过的分钟数
 * @param  seconds [out] 经过的秒数
 */
void GetElapsedTime_HMS(uint8_t *hours, uint8_t *minutes, uint8_t *seconds)
{
    RTC_TimeTypeDef sTime = {0};
    RTC_DateTypeDef sDate = {0};
    uint32_t currentTimestamp, elapsed;

    // 获取当前时间并转为秒数
    HAL_RTC_GetTime(&hrtc, &sTime, RTC_FORMAT_BIN);
    HAL_RTC_GetDate(&hrtc, &sDate, RTC_FORMAT_BIN);

    uint32_t nowSeconds =
        (sDate.Year * 365 + sDate.Month * 31 + sDate.Date) * 24 * 3600 +
        sTime.Hours * 3600 +
        sTime.Minutes * 60 +
        sTime.Seconds;

    // 计算经过的秒数
    elapsed = nowSeconds - s_ReferenceTimestamp;

    // 转换为 时:分:秒
    *seconds = elapsed % 60;
    *minutes = (elapsed / 60) % 60;
    *hours   = (elapsed / 3600);
}

/* USER CODE END 1 */