mbed library sources
Fork of mbed-src by
targets/cmsis/TARGET_STM/TARGET_DISCO_F051R8/cmsis_nvic.c
- Committer:
- todotani
- Date:
- 2014-09-05
- Revision:
- 308:59cc78a25982
- Parent:
- 130:1dec54e4aec3
File content as of revision 308:59cc78a25982:
/* mbed Microcontroller Library * CMSIS-style functionality to support dynamic vectors ******************************************************************************* * Copyright (c) 2014, STMicroelectronics * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are met: * * 1. Redistributions of source code must retain the above copyright notice, * this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright notice, * this list of conditions and the following disclaimer in the documentation * and/or other materials provided with the distribution. * 3. Neither the name of STMicroelectronics nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. ******************************************************************************* */ #include "cmsis_nvic.h" #define NVIC_RAM_VECTOR_ADDRESS (0x20000000) // Vectors positioned at start of RAM #define NVIC_FLASH_VECTOR_ADDRESS (0x08000000) // Initial vector position in flash static unsigned char vtor_remap = 0; // To keep track that the vectors remap is done void NVIC_SetVector(IRQn_Type IRQn, uint32_t vector) { int i; // Space for dynamic vectors, initialised to allocate in R/W static volatile uint32_t *vectors = (uint32_t *)NVIC_RAM_VECTOR_ADDRESS; // Copy and switch to dynamic vectors if first time called if (vtor_remap == 0) { uint32_t *old_vectors = (uint32_t *)NVIC_FLASH_VECTOR_ADDRESS; for (i = 0; i < NVIC_NUM_VECTORS; i++) { vectors[i] = old_vectors[i]; } SYSCFG->CFGR1 |= 0x03; // Embedded SRAM mapped at 0x00000000 vtor_remap = 1; // The vectors remap is done } // Set the vector vectors[IRQn + 16] = vector; } uint32_t NVIC_GetVector(IRQn_Type IRQn) { uint32_t *vectors = (uint32_t*)NVIC_RAM_VECTOR_ADDRESS; // Return the vector return vectors[IRQn + 16]; }