system_ARMCM0.h 2.6 KB

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  1. /**************************************************************************//**
  2. * @file system_ARMCM0.h
  3. * @brief CMSIS Device System Header File for
  4. * ARMCM0 Device Series
  5. * @version V1.08
  6. * @date 23. November 2012
  7. *
  8. * @note
  9. *
  10. ******************************************************************************/
  11. /* Copyright (c) 2011 - 2012 ARM LIMITED
  12. All rights reserved.
  13. Redistribution and use in source and binary forms, with or without
  14. modification, are permitted provided that the following conditions are met:
  15. - Redistributions of source code must retain the above copyright
  16. notice, this list of conditions and the following disclaimer.
  17. - Redistributions in binary form must reproduce the above copyright
  18. notice, this list of conditions and the following disclaimer in the
  19. documentation and/or other materials provided with the distribution.
  20. - Neither the name of ARM nor the names of its contributors may be used
  21. to endorse or promote products derived from this software without
  22. specific prior written permission.
  23. *
  24. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  25. AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  26. IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  27. ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
  28. LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  29. CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  30. SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  31. INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  32. CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  33. ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  34. POSSIBILITY OF SUCH DAMAGE.
  35. ---------------------------------------------------------------------------*/
  36. #ifndef SYSTEM_ARMCM0_H
  37. #define SYSTEM_ARMCM0_H
  38. #ifdef __cplusplus
  39. extern "C" {
  40. #endif
  41. extern uint32_t SystemCoreClock; /*!< System Clock Frequency (Core Clock) */
  42. /**
  43. * Initialize the system
  44. *
  45. * @param none
  46. * @return none
  47. *
  48. * @brief Setup the microcontroller system.
  49. * Initialize the System and update the SystemCoreClock variable.
  50. */
  51. extern void SystemInit (void);
  52. /**
  53. * Update SystemCoreClock variable
  54. *
  55. * @param none
  56. * @return none
  57. *
  58. * @brief Updates the SystemCoreClock with current core Clock
  59. * retrieved from cpu registers.
  60. */
  61. extern void SystemCoreClockUpdate (void);
  62. #ifdef __cplusplus
  63. }
  64. #endif
  65. #endif /* SYSTEM_ARMCM0_H */