text: /*******************************************************************************
   * Copyright (C) Maxim Integrated Products, Inc., All Rights Reserved.
   *
   * Permission is hereby granted, free of charge, to any person obtaining a
   * copy of this software and associated documentation files (the "Software"),
   * to deal in the Software without restriction, including without limitation
   * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   * and/or sell copies of the Software, and to permit persons to whom the
   * Software is furnished to do so, subject to the following conditions:
   *
   * The above copyright notice and this permission notice shall be included
   * in all copies or substantial portions of the Software.
   *
   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
   * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
   * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
   * IN NO EVENT SHALL MAXIM INTEGRATED BE LIABLE FOR ANY CLAIM, DAMAGES
   * OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
   * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
   * OTHER DEALINGS IN THE SOFTWARE.
   *
   * Except as contained in this notice, the name of Maxim Integrated
   * Products, Inc. shall not be used except as stated in the Maxim Integrated
   * Products, Inc. Branding Policy.
   *
   * The mere transfer of this software does not imply any licenses
   * of trade secrets, proprietary technology, copyrights, patents,
   * trademarks, maskwork rights, or any other form of intellectual
   * property whatsoever. Maxim Integrated Products, Inc. retains all
   * ownership rights.
   *******************************************************************************
   */
  
  #if DEVICE_RTC
  
  #include <stdio.h>
  #include <string.h>
  #include "rtc_api.h"
  #include "rtc.h"
  #include "mxc_sys.h"
  
  
  //******************************************************************************
  void rtc_init(void)
  {
      // Enable clock
      MXC_SYS_RTCClockEnable();
      
      while(MXC_RTC_Start() == E_BUSY) {
          ;
      }
  }
  
  //******************************************************************************
  void rtc_free(void)
  {
  
  }
  
  //******************************************************************************
  int rtc_isenabled(void)
  {
      return ((MXC_RTC->ctrl & MXC_F_RTC_CTRL_EN) >> MXC_F_RTC_CTRL_EN_POS);
  }
  
  //******************************************************************************
  void rtc_write(time_t t)
  {
      MXC_RTC_Stop();
      MXC_RTC_Init(t, 0); 
  
      while(MXC_RTC_Start() == E_BUSY) {
         ;
      }
  }
  
  //******************************************************************************
  time_t rtc_read(void)
  {
      uint32_t sec = 0;
      uint32_t subsec = 0;
      
      while (MXC_RTC_GetTime (&sec, &subsec) != 0) {
          ;
      }
  
      subsec &= 0xFFF; //It is 12 bits, 0xFFF = (1<<12)-1
      if (subsec > 2048) {
          sec += 1; // rolover
      }
  
      return sec;
  }
  
  #endif // DEVICE_RTC
  