| 1 | /**************************************************************************//**
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| 2 | * @file system_ARMCM7.c
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| 3 | * @brief CMSIS Device System Source File for
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| 4 | * ARMCM7 Device Series
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| 5 | * @version V5.00
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| 6 | * @date 07. September 2016
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| 7 | ******************************************************************************/
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| 8 | /*
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| 9 | * Copyright (c) 2009-2016 ARM Limited. All rights reserved.
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| 10 | *
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| 11 | * SPDX-License-Identifier: Apache-2.0
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| 12 | *
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| 13 | * Licensed under the Apache License, Version 2.0 (the License); you may
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| 14 | * not use this file except in compliance with the License.
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| 15 | * You may obtain a copy of the License at
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| 16 | *
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| 17 | * http://www.apache.org/licenses/LICENSE-2.0
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| 18 | *
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| 19 | * Unless required by applicable law or agreed to in writing, software
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| 20 | * distributed under the License is distributed on an AS IS BASIS, WITHOUT
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| 21 | * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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| 22 | * See the License for the specific language governing permissions and
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| 23 | * limitations under the License.
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| 24 | */
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| 25 |
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| 26 | #if defined (ARMCM7)
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| 27 | #include "ARMCM7.h"
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| 28 | #elif defined (ARMCM7_SP)
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| 29 | #include "ARMCM7_SP.h"
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| 30 | #elif defined (ARMCM7_DP)
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| 31 | #include "ARMCM7_DP.h"
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| 32 | #else
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| 33 | #error device not specified!
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| 34 | #endif
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| 35 |
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| 36 | /*----------------------------------------------------------------------------
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| 37 | Define clocks
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| 38 | *----------------------------------------------------------------------------*/
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| 39 | #define XTAL ( 5000000UL) /* Oscillator frequency */
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| 40 |
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| 41 | #define SYSTEM_CLOCK (5U * XTAL)
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| 42 |
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| 43 |
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| 44 | /*----------------------------------------------------------------------------
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| 45 | Externals
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| 46 | *----------------------------------------------------------------------------*/
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| 47 | #if defined (__VTOR_PRESENT) && (__VTOR_PRESENT == 1U)
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| 48 | extern uint32_t __Vectors;
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| 49 | #endif
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| 50 |
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| 51 | /*----------------------------------------------------------------------------
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| 52 | System Core Clock Variable
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| 53 | *----------------------------------------------------------------------------*/
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| 54 | uint32_t SystemCoreClock = SYSTEM_CLOCK;
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| 55 |
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| 56 |
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| 57 | /*----------------------------------------------------------------------------
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| 58 | System Core Clock update function
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| 59 | *----------------------------------------------------------------------------*/
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| 60 | void SystemCoreClockUpdate (void)
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| 61 | {
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| 62 | SystemCoreClock = SYSTEM_CLOCK;
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| 63 | }
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| 64 |
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| 65 | /*----------------------------------------------------------------------------
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| 66 | System initialization function
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| 67 | *----------------------------------------------------------------------------*/
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| 68 | void SystemInit (void)
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| 69 | {
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| 70 |
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| 71 | #if defined (__VTOR_PRESENT) && (__VTOR_PRESENT == 1U)
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| 72 | SCB->VTOR = (uint32_t) &__Vectors;
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| 73 | #endif
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| 74 |
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| 75 | #if defined (__FPU_USED) && (__FPU_USED == 1U)
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| 76 | SCB->CPACR |= ((3U << 10U*2U) | /* set CP10 Full Access */
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| 77 | (3U << 11U*2U) ); /* set CP11 Full Access */
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| 78 | #endif
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| 79 |
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| 80 | #ifdef UNALIGNED_SUPPORT_DISABLE
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| 81 | SCB->CCR |= SCB_CCR_UNALIGN_TRP_Msk;
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| 82 | #endif
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| 83 |
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| 84 | SystemCoreClock = SYSTEM_CLOCK;
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| 85 | }
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