Home Explore Help
Sign In
caowencai
/
wenkong_junshi
1
0
Fork 0
Files Issues 0 Pull Requests 0 Wiki
Branch: master
Branches Tags
wenkong_junshi
/
Examples
/
WWDGT
/
WWDGT_delay_feed
/
readme.txt

readme.txt 2.6 KB
Permalink History Raw

1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950 
  1. /*!
    2. 

  2.     \file    readme.txt
    3. 

  3.     \brief   description of the WWDGT_delay_feed example
    4. 

  4. 

  5.     \version 2017-02-10, V1.0.0, firmware for GD32F30x
    6. 

  6.     \version 2018-10-10, V1.1.0, firmware for GD32F30x
    7. 

  7.     \version 2018-12-25, V2.0.0, firmware for GD32F30x
    8. 

  8.     \version 2020-09-30, V2.1.0, firmware for GD32F30x
    9. 

  9. */
    10. 

  10. 

  11. /*
    12. 

  12.     Copyright (c) 2020, GigaDevice Semiconductor Inc.
    13. 

  13. 

  14.     Redistribution and use in source and binary forms, with or without modification, 
    15. 

  15. are permitted provided that the following conditions are met:
    16. 

  16. 

  17.     1. Redistributions of source code must retain the above copyright notice, this 
    18. 

  18.        list of conditions and the following disclaimer.
    19. 

  19.     2. Redistributions in binary form must reproduce the above copyright notice, 
    20. 

  20.        this list of conditions and the following disclaimer in the documentation 
    21. 

  21.        and/or other materials provided with the distribution.
    22. 

  22.     3. Neither the name of the copyright holder nor the names of its contributors 
    23. 

  23.        may be used to endorse or promote products derived from this software without 
    24. 

  24.        specific prior written permission.
    25. 

  25. 

  26.     THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 
    27. 

  27. AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 
    28. 

  28. WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 
    29. 

  29. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 
    30. 

  30. INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 
    31. 

  31. NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 
    32. 

  32. PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 
    33. 

  33. WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 
    34. 

  34. ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
    35. 

  35. OF SUCH DAMAGE.
    36. 

  36. */
    37. 

  37. 

  38.   This demo is based on the GD32307C-EVAL -V1.1 board, it shows the WWDGT with different
    39. 

  39. counter value and window value make the different WWDGT timeout. As a result, LED2 
    40. 

  40. and LED3 display a different phenomenon.
    41. 

  41. 

  42.   In this demo, the WWDGT counter value is set to 127, the refresh window is set to 
    43. 

  43. 80. In this case the WWDGT timeout is set to 34.9ms(the timeout may varies due to 
    44. 

  44. APB1 frequency dispersion), the value in the delay function is set to 26ms, the WWDGT 
    45. 

  45. counter can reloaded normally,the LED2 is turn off, LED3 is blinking fast.
    46. 

  46.   
    47. 

  47.   If the value in the delay function is not set properly, the WWDGT counter is not 
    48. 

  48. reloaded. As a result, the system reset and only the LED2 is remain illuminated.
    49. 

  49.   
    50. 

  50.   In this example the system clock is set to 120 MHz , and the APB1 is set to 60MHz.
    51.