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Deepsleep_wakeup_RTC
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readme.txt

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  1. /*!
    2. 

  2.     \file    readme.txt
    3. 

  3.     \brief   description of wakeup from deepsleep mode by RTC alarm demo
    4. 

  4. 

  5.     \version 2021-12-30, V1.0.0, firmware for GD32F30x
    6. 

  6. */
    7. 

  7. 

  8. /*
    9. 

  9.     Copyright (c) 2021, GigaDevice Semiconductor Inc.
    10. 

  10. 

  11.     Redistribution and use in source and binary forms, with or without modification, 
    12. 

  12. are permitted provided that the following conditions are met:
    13. 

  13. 

  14.     1. Redistributions of source code must retain the above copyright notice, this 
    15. 

  15.        list of conditions and the following disclaimer.
    16. 

  16.     2. Redistributions in binary form must reproduce the above copyright notice, 
    17. 

  17.        this list of conditions and the following disclaimer in the documentation 
    18. 

  18.        and/or other materials provided with the distribution.
    19. 

  19.     3. Neither the name of the copyright holder nor the names of its contributors 
    20. 

  20.        may be used to endorse or promote products derived from this software without 
    21. 

  21.        specific prior written permission.
    22. 

  22. 

  23.     THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 
    24. 

  24. AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 
    25. 

  25. WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 
    26. 

  26. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 
    27. 

  27. INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 
    28. 

  28. NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 
    29. 

  29. PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 
    30. 

  30. WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 
    31. 

  31. ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
    32. 

  32. OF SUCH DAMAGE.
    33. 

  33. */
    34. 

  34. 

  35.     This demo is based on the GD32307C-EVAL-V1.1, it explains how to configure the
    36. 

  36. RTC module to wake up MCU from deepsleep and feed dog in RTC alarm interrupt.
    37. 

  37.     Select RCU_IRC40K as RTC and FWDGT clock source. The RTC alarm interval is 2s and the 
    38. 

  38. FWDGT timeout is configured as 8s.
    39. 

  39.     After start-up, the LED2 is off and the LED5 is on. After 2 seconds, LED5 is off and the 
    40. 

  40. MCU enters deepsleep mode. MCU is waked up by RTC alarm every 2 seconds. After wakeup, LED2 
    41. 

  41. is toggled, then MCU enters deepsleep mode again.
    42.