mirror of https://github.com/ARMmbed/mbed-os.git
94 lines
3.3 KiB
C
94 lines
3.3 KiB
C
/**
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* @file
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* @brief This file contains the implementations of the vendor
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* defined NVIC function.
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*
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*/
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/* ****************************************************************************
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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: 2016-09-28 10:27:00 -0500 (Wed, 28 Sep 2016) $
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* $Revision: 24512 $
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*
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*************************************************************************** */
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/**
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* @ingroup mxc_nvic
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* @{
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*/
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/* **** Includes **** */
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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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/* RAM vector_table needs to be aligned with the size of the vector table */
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/* TODO: Use MXC_IRQ_COUNT to automatically set this alignment per DUI0553A 4.3.4 */
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/* Vector Table Offset which requires the next-power-of-two alignment. This */
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/* can be calculated by 4*pow(2,ceil(log2(MXC_IRQ_COUNT))) */
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#if defined ( __ICCARM__ )
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#pragma data_alignment = 512
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#define __isr_vector __vector_table
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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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/* **** Definitions **** */
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/* **** Globals **** */
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/* **** Functions **** */
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/* ************************************************************************* */
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void NVIC_SetRAM(void)
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{
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memcpy(&ramVectorTable, (uint32_t*)SCB->VTOR, sizeof(ramVectorTable));
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SCB->VTOR = (uint32_t)&ramVectorTable;
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}
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/* ************************************************************************* */
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int 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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return 0;
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}
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/**@} end of group mxc_nvic */
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