mbed library sources
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targets/cmsis/TARGET_ARM_SSG/TARGET_MPS2_M4/system_CMSDK_CM4.c
- Committer:
- mbed_official
- Date:
- 2015-09-02
- Revision:
- 616:ade316e51a72
- Parent:
- 580:3c14cb9b87c5
File content as of revision 616:ade316e51a72:
/* MPS2 CMSIS Library * * Copyright (c) 2006-2015 ARM Limited * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are met: * * 1. Redistributions of source code must retain the above copyright notice, * this list of conditions and the following disclaimer. * * 2. Redistributions in binary form must reproduce the above copyright notice, * this list of conditions and the following disclaimer in the documentation * and/or other materials provided with the distribution. * * 3. Neither the name of the copyright holder nor the names of its contributors * may be used to endorse or promote products derived from this software without * specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. ******************************************************************************* * @file system_CMSDK_CM4.c * @brief CMSIS Device System Source File for * CMSDK_M4 Device * @version V3.02 * @date 15. November 2013 * * @note * *******************************************************************************/ #include "CMSDK_CM4.h" /*---------------------------------------------------------------------------- Define clocks *----------------------------------------------------------------------------*/ #define __XTAL (50000000UL) /* Oscillator frequency */ #define __SYSTEM_CLOCK (__XTAL / 2) /*---------------------------------------------------------------------------- Clock Variable definitions *----------------------------------------------------------------------------*/ uint32_t SystemCoreClock = __SYSTEM_CLOCK;/*!< System Clock Frequency (Core Clock)*/ /*---------------------------------------------------------------------------- Clock functions *----------------------------------------------------------------------------*/ /** * Update SystemCoreClock variable * * @param none * @return none * * @brief Updates the SystemCoreClock with current core Clock * retrieved from cpu registers. */ void SystemCoreClockUpdate (void) { SystemCoreClock = __SYSTEM_CLOCK; } /** * Initialize the system * * @param none * @return none * * @brief Setup the microcontroller system. * Initialize the System. */ void SystemInit (void) { #if (__FPU_USED == 1) SCB->CPACR |= ((3UL << 10*2) | /* set CP10 Full Access */ (3UL << 11*2) ); /* set CP11 Full Access */ #endif #ifdef UNALIGNED_SUPPORT_DISABLE SCB->CCR |= SCB_CCR_UNALIGN_TRP_Msk; #endif SystemCoreClock = __SYSTEM_CLOCK; }