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targets/cmsis/TARGET_ARM_SSG/TARGET_MPS2_BEID/system_CMSDK_BEID.c@624:83778a75d1b4, 2015-09-25 (annotated)

Committer:
mbed_official
Date:
Fri Sep 25 11:45:09 2015 +0100
Revision:
624:83778a75d1b4
Synchronized with git revision b290644b9cdd33d24fc3f629368795b3d9c386fe



Full URL: https://github.com/mbedmicro/mbed/commit/b290644b9cdd33d24fc3f629368795b3d9c386fe/



changes for adding IoT Subsystem for Cortex-M target

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 624:83778a75d1b4 1 /**************************************************************************//**
mbed_official 624:83778a75d1b4 2 * @file system_CMSDK_BEID.c
mbed_official 624:83778a75d1b4 3 * @brief CMSIS Device System Source File for
mbed_official 624:83778a75d1b4 4 * CMSDK_M3 Device
mbed_official 624:83778a75d1b4 5 * @version V3.02
mbed_official 624:83778a75d1b4 6 * @date 15. November 2013
mbed_official 624:83778a75d1b4 7 *
mbed_official 624:83778a75d1b4 8 * @note
mbed_official 624:83778a75d1b4 9 *
mbed_official 624:83778a75d1b4 10 ******************************************************************************/
mbed_official 624:83778a75d1b4 11 /* Copyright (c) 2011 - 2013 ARM LIMITED
mbed_official 624:83778a75d1b4 12
mbed_official 624:83778a75d1b4 13 All rights reserved.
mbed_official 624:83778a75d1b4 14 Redistribution and use in source and binary forms, with or without
mbed_official 624:83778a75d1b4 15 modification, are permitted provided that the following conditions are met:
mbed_official 624:83778a75d1b4 16 - Redistributions of source code must retain the above copyright
mbed_official 624:83778a75d1b4 17 notice, this list of conditions and the following disclaimer.
mbed_official 624:83778a75d1b4 18 - Redistributions in binary form must reproduce the above copyright
mbed_official 624:83778a75d1b4 19 notice, this list of conditions and the following disclaimer in the
mbed_official 624:83778a75d1b4 20 documentation and/or other materials provided with the distribution.
mbed_official 624:83778a75d1b4 21 - Neither the name of ARM nor the names of its contributors may be used
mbed_official 624:83778a75d1b4 22 to endorse or promote products derived from this software without
mbed_official 624:83778a75d1b4 23 specific prior written permission.
mbed_official 624:83778a75d1b4 24 *
mbed_official 624:83778a75d1b4 25 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 624:83778a75d1b4 26 AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 624:83778a75d1b4 27 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
mbed_official 624:83778a75d1b4 28 ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
mbed_official 624:83778a75d1b4 29 LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
mbed_official 624:83778a75d1b4 30 CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
mbed_official 624:83778a75d1b4 31 SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
mbed_official 624:83778a75d1b4 32 INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
mbed_official 624:83778a75d1b4 33 CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
mbed_official 624:83778a75d1b4 34 ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
mbed_official 624:83778a75d1b4 35 POSSIBILITY OF SUCH DAMAGE.
mbed_official 624:83778a75d1b4 36 ---------------------------------------------------------------------------*/
mbed_official 624:83778a75d1b4 37
mbed_official 624:83778a75d1b4 38
mbed_official 624:83778a75d1b4 39 #include "CMSDK_BEID.h"
mbed_official 624:83778a75d1b4 40
mbed_official 624:83778a75d1b4 41 /*----------------------------------------------------------------------------
mbed_official 624:83778a75d1b4 42 Define clocks
mbed_official 624:83778a75d1b4 43 *----------------------------------------------------------------------------*/
mbed_official 624:83778a75d1b4 44 #define __XTAL (50000000UL) /* Oscillator frequency */
mbed_official 624:83778a75d1b4 45
mbed_official 624:83778a75d1b4 46 #define __SYSTEM_CLOCK (__XTAL / 2)
mbed_official 624:83778a75d1b4 47
mbed_official 624:83778a75d1b4 48
mbed_official 624:83778a75d1b4 49 /*----------------------------------------------------------------------------
mbed_official 624:83778a75d1b4 50 Clock Variable definitions
mbed_official 624:83778a75d1b4 51 *----------------------------------------------------------------------------*/
mbed_official 624:83778a75d1b4 52 uint32_t SystemCoreClock = __SYSTEM_CLOCK;/*!< System Clock Frequency (Core Clock)*/
mbed_official 624:83778a75d1b4 53
mbed_official 624:83778a75d1b4 54
mbed_official 624:83778a75d1b4 55 /*----------------------------------------------------------------------------
mbed_official 624:83778a75d1b4 56 Clock functions
mbed_official 624:83778a75d1b4 57 *----------------------------------------------------------------------------*/
mbed_official 624:83778a75d1b4 58 /**
mbed_official 624:83778a75d1b4 59 * Update SystemCoreClock variable
mbed_official 624:83778a75d1b4 60 *
mbed_official 624:83778a75d1b4 61 * @param none
mbed_official 624:83778a75d1b4 62 * @return none
mbed_official 624:83778a75d1b4 63 *
mbed_official 624:83778a75d1b4 64 * @brief Updates the SystemCoreClock with current core Clock
mbed_official 624:83778a75d1b4 65 * retrieved from cpu registers.
mbed_official 624:83778a75d1b4 66 */
mbed_official 624:83778a75d1b4 67 void SystemCoreClockUpdate (void)
mbed_official 624:83778a75d1b4 68 {
mbed_official 624:83778a75d1b4 69
mbed_official 624:83778a75d1b4 70 SystemCoreClock = __SYSTEM_CLOCK;
mbed_official 624:83778a75d1b4 71
mbed_official 624:83778a75d1b4 72 }
mbed_official 624:83778a75d1b4 73
mbed_official 624:83778a75d1b4 74 /**
mbed_official 624:83778a75d1b4 75 * Initialize the system
mbed_official 624:83778a75d1b4 76 *
mbed_official 624:83778a75d1b4 77 * @param none
mbed_official 624:83778a75d1b4 78 * @return none
mbed_official 624:83778a75d1b4 79 *
mbed_official 624:83778a75d1b4 80 * @brief Setup the microcontroller system.
mbed_official 624:83778a75d1b4 81 * Initialize the System.
mbed_official 624:83778a75d1b4 82 */
mbed_official 624:83778a75d1b4 83 void SystemInit (void)
mbed_official 624:83778a75d1b4 84 {
mbed_official 624:83778a75d1b4 85
mbed_official 624:83778a75d1b4 86 #ifdef UNALIGNED_SUPPORT_DISABLE
mbed_official 624:83778a75d1b4 87 SCB->CCR |= SCB_CCR_UNALIGN_TRP_Msk;
mbed_official 624:83778a75d1b4 88 #endif
mbed_official 624:83778a75d1b4 89
mbed_official 624:83778a75d1b4 90 SystemCoreClock = __SYSTEM_CLOCK;
mbed_official 624:83778a75d1b4 91
mbed_official 624:83778a75d1b4 92 // Enable AHB and APB clock
mbed_official 624:83778a75d1b4 93 CMSDK_SYSCON->AHBCLKCFG0SET = 0xF; // GPIO
mbed_official 624:83778a75d1b4 94 CMSDK_SYSCON->APBCLKCFG0SET = 0x37; // UART0, UART1, TIMER0, TIMER1, DUAL TIMER
mbed_official 624:83778a75d1b4 95 }