tmk_core/tool/mbed/mbed-sdk/libraries/mbed/targets/cmsis/TARGET_Freescale/TARGET_KLXX/TARGET_KL05Z/cmsis_nvic.c

   1 /* mbed Microcontroller Library
   2  * CMSIS-style functionality to support dynamic vectors
   3  *******************************************************************************
   4  * Copyright (c) 2011 ARM Limited. All rights reserved.
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions are met:
   9  *
  10  * 1. Redistributions of source code must retain the above copyright notice,
  11  *    this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright notice,
  13  *    this list of conditions and the following disclaimer in the documentation
  14  *    and/or other materials provided with the distribution.
  15  * 3. Neither the name of ARM Limited nor the names of its contributors
  16  *    may be used to endorse or promote products derived from this software
  17  *    without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  20  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  22  * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
  23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  25  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
  26  * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  27  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  28  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  29  *******************************************************************************
  30  */
  31 #include "cmsis_nvic.h"
  32
  33 #define NVIC_RAM_VECTOR_ADDRESS (0x1FFFFC00)  // Vectors positioned at start of RAM
  34 #define NVIC_FLASH_VECTOR_ADDRESS (0x0)       // Initial vector position in flash
  35
  36 void NVIC_SetVector(IRQn_Type IRQn, uint32_t vector) {
  37     uint32_t *vectors = (uint32_t*)SCB->VTOR;
  38     uint32_t i;
  39
  40     // Copy and switch to dynamic vectors if the first time called
  41     if (SCB->VTOR == NVIC_FLASH_VECTOR_ADDRESS) {
  42         uint32_t *old_vectors = vectors;
  43         vectors = (uint32_t*)NVIC_RAM_VECTOR_ADDRESS;
  44         for (i=0; i<NVIC_NUM_VECTORS; i++) {
  45             vectors[i] = old_vectors[i];
  46         }
  47         SCB->VTOR = (uint32_t)NVIC_RAM_VECTOR_ADDRESS;
  48     }
  49     vectors[IRQn + 16] = vector;
  50 }
  51
  52 uint32_t NVIC_GetVector(IRQn_Type IRQn) {
  53     uint32_t *vectors = (uint32_t*)SCB->VTOR;
  54     return vectors[IRQn + 16];
  55 }