85 lines
3.0 KiB
C
85 lines
3.0 KiB
C
/* *****************************************************************************
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* Copyright (C) 2016 Maxim Integrated Products, Inc., All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included
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* in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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* IN NO EVENT SHALL MAXIM INTEGRATED BE LIABLE FOR ANY CLAIM, DAMAGES
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* OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*
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* Except as contained in this notice, the name of Maxim Integrated
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* Products, Inc. shall not be used except as stated in the Maxim Integrated
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* Products, Inc. Branding Policy.
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*
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* The mere transfer of this software does not imply any licenses
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* of trade secrets, proprietary technology, copyrights, patents,
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* trademarks, maskwork rights, or any other form of intellectual
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* property whatsoever. Maxim Integrated Products, Inc. retains all
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* ownership rights.
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*
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* $Date: 2019-06-05 16:53:29 -0500 (Wed, 05 Jun 2019) $
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* $Revision: 43696 $
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*
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**************************************************************************** */
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#include "mxc_config.h"
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#include <string.h>
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#include "nvic_table.h"
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#if !defined (NVIC_USER_IRQ_OFFSET)
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#define NVIC_USER_IRQ_OFFSET 16 /**! Offset for device specific IRQs */
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#endif
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/* RAM vector_table needs to be aligned with the size of the vector table */
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#if defined ( __ICCARM__ )
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#pragma data_alignment = 512
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#else
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__attribute__((aligned(512)))
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#endif
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static void (*ramVectorTable[MXC_IRQ_COUNT])(void);
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void NVIC_SetRAM(void)
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{
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#if defined (__ICCARM__)
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extern void (* const __isr_vector[])(void);
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#else
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/* should be defined in starup_<device>.S */
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extern uint32_t __isr_vector[97];
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#endif
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memcpy(&ramVectorTable, &__isr_vector, sizeof(ramVectorTable));
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SCB->VTOR = (uint32_t)&ramVectorTable;
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}
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void NVIC_SetVector(IRQn_Type irqn, void(*irq_handler)(void))
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{
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int index = irqn + 16; /* offset for externals */
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/* If not copied, do copy */
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if (SCB->VTOR != (uint32_t)&ramVectorTable) {
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NVIC_SetRAM();
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}
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ramVectorTable[index] = irq_handler;
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NVIC_EnableIRQ(irqn);
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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 *)SCB->VTOR;
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return vectors[(int32_t)irqn + NVIC_USER_IRQ_OFFSET];
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}
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