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targets/cmsis/TARGET_ARM_SSG/TARGET_MPS2_BEID/system_CMSDK_BEID.c
- Committer:
- mbed_official
- Date:
- 2015-09-25
- Revision:
- 624:83778a75d1b4
File content as of revision 624:83778a75d1b4:
/**************************************************************************//** * @file system_CMSDK_BEID.c * @brief CMSIS Device System Source File for * CMSDK_M3 Device * @version V3.02 * @date 15. November 2013 * * @note * ******************************************************************************/ /* Copyright (c) 2011 - 2013 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: - Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. - 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. - Neither the name of ARM 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 COPYRIGHT HOLDERS AND 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. ---------------------------------------------------------------------------*/ #include "CMSDK_BEID.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) { #ifdef UNALIGNED_SUPPORT_DISABLE SCB->CCR |= SCB_CCR_UNALIGN_TRP_Msk; #endif SystemCoreClock = __SYSTEM_CLOCK; // Enable AHB and APB clock CMSDK_SYSCON->AHBCLKCFG0SET = 0xF; // GPIO CMSDK_SYSCON->APBCLKCFG0SET = 0x37; // UART0, UART1, TIMER0, TIMER1, DUAL TIMER }