lzbp li / mbed-src

mbed library sources

Fork of mbed-src by mbed official

targets/cmsis/TARGET_ARM_SSG/TARGET_MPS2_M7/system_CMSDK_CM7.c@580:3c14cb9b87c5, 2015-07-02 (annotated)

Committer:
mbed_official
Date:
Thu Jul 02 16:15:09 2015 +0100
Revision:
580:3c14cb9b87c5
Synchronized with git revision 213caf296f26963a7bea129b8ec4f33bbd1e6588



Full URL: https://github.com/mbedmicro/mbed/commit/213caf296f26963a7bea129b8ec4f33bbd1e6588/



commit of mps2

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 580:3c14cb9b87c5 1 /* MPS2 CMSIS Library
mbed_official 580:3c14cb9b87c5 2 *
mbed_official 580:3c14cb9b87c5 3 * Copyright (c) 2006-2015 ARM Limited
mbed_official 580:3c14cb9b87c5 4 * All rights reserved.
mbed_official 580:3c14cb9b87c5 5 *
mbed_official 580:3c14cb9b87c5 6 * Redistribution and use in source and binary forms, with or without
mbed_official 580:3c14cb9b87c5 7 * modification, are permitted provided that the following conditions are met:
mbed_official 580:3c14cb9b87c5 8 *
mbed_official 580:3c14cb9b87c5 9 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 580:3c14cb9b87c5 10 * this list of conditions and the following disclaimer.
mbed_official 580:3c14cb9b87c5 11 *
mbed_official 580:3c14cb9b87c5 12 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 580:3c14cb9b87c5 13 * this list of conditions and the following disclaimer in the documentation
mbed_official 580:3c14cb9b87c5 14 * and/or other materials provided with the distribution.
mbed_official 580:3c14cb9b87c5 15 *
mbed_official 580:3c14cb9b87c5 16 * 3. Neither the name of the copyright holder nor the names of its contributors
mbed_official 580:3c14cb9b87c5 17 * may be used to endorse or promote products derived from this software without
mbed_official 580:3c14cb9b87c5 18 * specific prior written permission.
mbed_official 580:3c14cb9b87c5 19 *
mbed_official 580:3c14cb9b87c5 20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 580:3c14cb9b87c5 21 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 580:3c14cb9b87c5 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
mbed_official 580:3c14cb9b87c5 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
mbed_official 580:3c14cb9b87c5 24 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
mbed_official 580:3c14cb9b87c5 25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
mbed_official 580:3c14cb9b87c5 26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
mbed_official 580:3c14cb9b87c5 27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
mbed_official 580:3c14cb9b87c5 28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
mbed_official 580:3c14cb9b87c5 29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
mbed_official 580:3c14cb9b87c5 30 * POSSIBILITY OF SUCH DAMAGE.
mbed_official 580:3c14cb9b87c5 31 *******************************************************************************
mbed_official 580:3c14cb9b87c5 32 * @file system_CMSDK_CM7.c
mbed_official 580:3c14cb9b87c5 33 * @brief CMSIS Device System Source File for
mbed_official 580:3c14cb9b87c5 34 * CMSDK_CM7 Device
mbed_official 580:3c14cb9b87c5 35 * @version V1.00
mbed_official 580:3c14cb9b87c5 36 * @date 27. August 2014
mbed_official 580:3c14cb9b87c5 37 *
mbed_official 580:3c14cb9b87c5 38 * @note
mbed_official 580:3c14cb9b87c5 39 *
mbed_official 580:3c14cb9b87c5 40 *******************************************************************************/
mbed_official 580:3c14cb9b87c5 41
mbed_official 580:3c14cb9b87c5 42
mbed_official 580:3c14cb9b87c5 43 #if defined (CMSDK_CM7)
mbed_official 580:3c14cb9b87c5 44 #include "CMSDK_CM7.h"
mbed_official 580:3c14cb9b87c5 45 #elif defined (CMSDK_CM7_SP)
mbed_official 580:3c14cb9b87c5 46 #include "CMSDK_CM7_SP.h"
mbed_official 580:3c14cb9b87c5 47 #elif defined (CMSDK_CM7_DP)
mbed_official 580:3c14cb9b87c5 48 #include "CMSDK_CM7_DP.h"
mbed_official 580:3c14cb9b87c5 49 #else
mbed_official 580:3c14cb9b87c5 50 #error device not specified!
mbed_official 580:3c14cb9b87c5 51 #endif
mbed_official 580:3c14cb9b87c5 52
mbed_official 580:3c14cb9b87c5 53 /*----------------------------------------------------------------------------
mbed_official 580:3c14cb9b87c5 54 Define clocks
mbed_official 580:3c14cb9b87c5 55 *----------------------------------------------------------------------------*/
mbed_official 580:3c14cb9b87c5 56 #define __XTAL (50000000UL) /* Oscillator frequency */
mbed_official 580:3c14cb9b87c5 57
mbed_official 580:3c14cb9b87c5 58 #define __SYSTEM_CLOCK (__XTAL / 2)
mbed_official 580:3c14cb9b87c5 59
mbed_official 580:3c14cb9b87c5 60
mbed_official 580:3c14cb9b87c5 61 /*----------------------------------------------------------------------------
mbed_official 580:3c14cb9b87c5 62 System Core Clock Variable
mbed_official 580:3c14cb9b87c5 63 *----------------------------------------------------------------------------*/
mbed_official 580:3c14cb9b87c5 64 uint32_t SystemCoreClock = __SYSTEM_CLOCK;/* System Core Clock Frequency */
mbed_official 580:3c14cb9b87c5 65
mbed_official 580:3c14cb9b87c5 66
mbed_official 580:3c14cb9b87c5 67 /**
mbed_official 580:3c14cb9b87c5 68 * Update SystemCoreClock variable
mbed_official 580:3c14cb9b87c5 69 *
mbed_official 580:3c14cb9b87c5 70 * @param none
mbed_official 580:3c14cb9b87c5 71 * @return none
mbed_official 580:3c14cb9b87c5 72 *
mbed_official 580:3c14cb9b87c5 73 * @brief Updates the SystemCoreClock with current core Clock
mbed_official 580:3c14cb9b87c5 74 * retrieved from cpu registers.
mbed_official 580:3c14cb9b87c5 75 */
mbed_official 580:3c14cb9b87c5 76 void SystemCoreClockUpdate (void)
mbed_official 580:3c14cb9b87c5 77 {
mbed_official 580:3c14cb9b87c5 78
mbed_official 580:3c14cb9b87c5 79 SystemCoreClock = __SYSTEM_CLOCK;
mbed_official 580:3c14cb9b87c5 80
mbed_official 580:3c14cb9b87c5 81 }
mbed_official 580:3c14cb9b87c5 82
mbed_official 580:3c14cb9b87c5 83 /**
mbed_official 580:3c14cb9b87c5 84 * Initialize the system
mbed_official 580:3c14cb9b87c5 85 *
mbed_official 580:3c14cb9b87c5 86 * @param none
mbed_official 580:3c14cb9b87c5 87 * @return none
mbed_official 580:3c14cb9b87c5 88 *
mbed_official 580:3c14cb9b87c5 89 * @brief Setup the microcontroller system.
mbed_official 580:3c14cb9b87c5 90 * Initialize the System.
mbed_official 580:3c14cb9b87c5 91 */
mbed_official 580:3c14cb9b87c5 92 void SystemInit (void)
mbed_official 580:3c14cb9b87c5 93 {
mbed_official 580:3c14cb9b87c5 94 #if (__FPU_USED == 1)
mbed_official 580:3c14cb9b87c5 95 SCB->CPACR |= ((3UL << 10*2) | /* set CP10 Full Access */
mbed_official 580:3c14cb9b87c5 96 (3UL << 11*2) ); /* set CP11 Full Access */
mbed_official 580:3c14cb9b87c5 97 #endif
mbed_official 580:3c14cb9b87c5 98
mbed_official 580:3c14cb9b87c5 99 #ifdef UNALIGNED_SUPPORT_DISABLE
mbed_official 580:3c14cb9b87c5 100 SCB->CCR |= SCB_CCR_UNALIGN_TRP_Msk;
mbed_official 580:3c14cb9b87c5 101 #endif
mbed_official 580:3c14cb9b87c5 102
mbed_official 580:3c14cb9b87c5 103 SystemCoreClock = __SYSTEM_CLOCK;
mbed_official 580:3c14cb9b87c5 104
mbed_official 580:3c14cb9b87c5 105 }