0ef1717155
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44 lines
1.4 KiB
C
44 lines
1.4 KiB
C
/* mbed Microcontroller Library
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* SPDX-License-Identifier: BSD-3-Clause
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******************************************************************************
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*
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* Copyright (c) 2015-2020 STMicroelectronics.
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* All rights reserved.
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*
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* This software component is licensed by ST under BSD 3-Clause license,
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* the "License"; You may not use this file except in compliance with the
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* License. You may obtain a copy of the License at:
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* opensource.org/licenses/BSD-3-Clause
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*
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******************************************************************************
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*/
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#include "cmsis.h"
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#include "nvic_addr.h"
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#define NVIC_USER_IRQ_OFFSET 16
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void NVIC_SetVector(IRQn_Type IRQn, uint32_t vector)
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{
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int i;
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// Copy and switch to dynamic vectors if first time called
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if ((SYSCFG->CFGR1 & SYSCFG_CFGR1_MEM_MODE) != SYSCFG_CFGR1_MEM_MODE) {
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uint32_t *old_vectors = (uint32_t *)NVIC_FLASH_VECTOR_ADDRESS;
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for (i = 0; i < NVIC_NUM_VECTORS; i++) {
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*((uint32_t *)(NVIC_RAM_VECTOR_ADDRESS + (i * 4))) = old_vectors[i];
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}
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SYSCFG->CFGR1 |= SYSCFG_CFGR1_MEM_MODE; // Embedded SRAM mapped at 0x00000000
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}
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// Set the vector
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*((uint32_t *)(NVIC_RAM_VECTOR_ADDRESS + (IRQn * 4) + (NVIC_USER_IRQ_OFFSET * 4))) = vector;
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}
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uint32_t NVIC_GetVector(IRQn_Type IRQn)
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{
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uint32_t *vectors = (uint32_t *)NVIC_RAM_VECTOR_ADDRESS;
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// Return the vector
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return vectors[IRQn + 16];
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}
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