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Diff: targets/TARGET_STM/TARGET_STM32F4/TARGET_STM32F429xI/device/system_init_pre.c
- Revision:
- 158:b23ee177fd68
- Parent:
- 157:ff67d9f36b67
- Child:
- 160:d5399cc887bb
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/targets/TARGET_STM/TARGET_STM32F4/TARGET_STM32F429xI/device/system_init_pre.c Tue Feb 14 14:44:10 2017 +0000 @@ -0,0 +1,42 @@ +/* + * Copyright (c) 2015-2015, ARM Limited, All Rights Reserved + * SPDX-License-Identifier: Apache-2.0 + * + * Licensed under the Apache License, Version 2.0 (the "License"); you may + * not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT + * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ +#include "stm32f4xx.h" + +/*!< Uncomment the following line if you need to relocate your vector Table in + Internal SRAM. */ +/* note: if uVisor is present the definition must go in system_init_pre.c */ +/* #define VECT_TAB_SRAM */ +#define VECT_TAB_OFFSET 0x00 /*!< Vector Table base offset field. + This value must be a multiple of 0x200. */ + +/* this function is needed to peform hardware initialization that must happen + * before the uVisor; the whole SystemInit function for the STM32F4 cannot be + * put here as it depends on some APIs that need uVisor to be enabled */ +void SystemInitPre(void) +{ + /* FPU settings ------------------------------------------------------------*/ +#if (__FPU_PRESENT == 1) && (__FPU_USED == 1) + SCB->CPACR |= ((3UL << 10*2)|(3UL << 11*2)); /* set CP10 and CP11 Full Access */ +#endif + + /* Configure the Vector Table location add offset address ------------------*/ +#ifdef VECT_TAB_SRAM + SCB->VTOR = SRAM_BASE | VECT_TAB_OFFSET; /* Vector Table Relocation in Internal SRAM */ +#else + SCB->VTOR = FLASH_BASE | VECT_TAB_OFFSET; /* Vector Table Relocation in Internal FLASH */ +#endif +}