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| Rev | Author | Line No. | Line |
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| 56 | mjames | 1 | /**************************************************************************//** |
| 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 | |||
| 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 | |||
| 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 | |||
| 41 | #define SYSTEM_CLOCK (5U * XTAL) |
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| 42 | |||
| 43 | |||
| 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 | |||
| 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 | |||
| 56 | |||
| 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 | |||
| 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 | |||
| 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 | |||
| 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 | |||
| 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 | |||
| 84 | SystemCoreClock = SYSTEM_CLOCK; |
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| 85 | } |