systick.c 2.9 KB

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  1. /*!
  2. \file systick.c
  3. \brief the systick configuration file
  4. \version 2014-12-26, V1.0.0, firmware for GD32F10x
  5. \version 2017-06-20, V2.0.0, firmware for GD32F10x
  6. \version 2018-07-31, V2.1.0, firmware for GD32F10x
  7. \version 2020-09-30, V2.2.0, firmware for GD32F10x
  8. */
  9. /*
  10. Copyright (c) 2020, GigaDevice Semiconductor Inc.
  11. Redistribution and use in source and binary forms, with or without modification,
  12. are permitted provided that the following conditions are met:
  13. 1. Redistributions of source code must retain the above copyright notice, this
  14. list of conditions and the following disclaimer.
  15. 2. Redistributions in binary form must reproduce the above copyright notice,
  16. this list of conditions and the following disclaimer in the documentation
  17. and/or other materials provided with the distribution.
  18. 3. Neither the name of the copyright holder nor the names of its contributors
  19. may be used to endorse or promote products derived from this software without
  20. specific prior written permission.
  21. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  22. AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  23. WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  24. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
  25. INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  26. NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  27. PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
  28. WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  29. ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
  30. OF SUCH DAMAGE.
  31. */
  32. #include "gd32f10x.h"
  33. #include "systick.h"
  34. volatile static uint32_t delay;
  35. volatile static int32_t runtime=0;
  36. /*!
  37. \brief configure systick
  38. \param[in] none
  39. \param[out] none
  40. \retval none
  41. */
  42. void systick_config(void)
  43. {
  44. /* setup systick timer for 1000Hz interrupts */
  45. if (SysTick_Config(SystemCoreClock / 1000U)){
  46. /* capture error */
  47. while (1){
  48. }
  49. }
  50. /* configure the systick handler priority */
  51. NVIC_SetPriority(SysTick_IRQn, 0x00U);
  52. }
  53. /*!
  54. \brief delay a time in milliseconds
  55. \param[in] count: count in milliseconds
  56. \param[out] none
  57. \retval none
  58. */
  59. void delay_1ms(uint32_t count)
  60. {
  61. delay = count;
  62. while(0U != delay){
  63. }
  64. }
  65. /*!
  66. \brief delay decrement
  67. \param[in] none
  68. \param[out] none
  69. \retval none
  70. */
  71. void delay_decrement(void)
  72. {
  73. if (0U != delay){
  74. delay--;
  75. }
  76. }
  77. int32_t gettick(){
  78. return runtime;
  79. }
  80. void runtime_increment(void){
  81. runtime++;
  82. if (runtime == 0x7FFFFFFF) /* 这个变量是 int32_t 类型,最大数为 0x7FFFFFFF */
  83. {
  84. runtime = 0;
  85. }
  86. }