/**************************************************************************//** * @file system_ARMCM0.c * @brief CMSIS Device System Source File for * ARMCM0 Device Series * @version V1.07 * @date 30. January 2012 * * @note * Copyright (C) 2012 ARM Limited. All rights reserved. * * @par * ARM Limited (ARM) is supplying this software for use with Cortex-M * processor based microcontrollers. This file can be freely distributed * within development tools that are supporting such ARM based processors. * * @par * THIS SOFTWARE IS PROVIDED "AS IS". NO WARRANTIES, WHETHER EXPRESS, IMPLIED * OR STATUTORY, INCLUDING, BUT NOT LIMITED TO, IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE APPLY TO THIS SOFTWARE. * ARM SHALL NOT, IN ANY CIRCUMSTANCES, BE LIABLE FOR SPECIAL, INCIDENTAL, OR * CONSEQUENTIAL DAMAGES, FOR ANY REASON WHATSOEVER. * ******************************************************************************/ #include "ARMCM0.h" /*---------------------------------------------------------------------------- Define clocks *----------------------------------------------------------------------------*/ #define __HSI ( 8000000UL) #define __XTAL ( 5000000UL) /* Oscillator frequency */ #define __SYSTEM_CLOCK (5*__XTAL) /*---------------------------------------------------------------------------- Clock Variable definitions *----------------------------------------------------------------------------*/ uint32_t SystemCoreClock = __SYSTEM_CLOCK;/*!< System Clock Frequency (Core Clock)*/ /*---------------------------------------------------------------------------- Clock functions *----------------------------------------------------------------------------*/ void SystemCoreClockUpdate (void) /* Get Core Clock Frequency */ { SystemCoreClock = __SYSTEM_CLOCK; } /** * Initialize the system * * @param none * @return none * * @brief Setup the microcontroller system. * Initialize the System. */ void SystemInit (void) { SystemCoreClock = __SYSTEM_CLOCK; }