Mouse code for the MacroRat
Diff: mbed-dev/targets/TARGET_STM/TARGET_STM32F0/TARGET_DISCO_F051R8/device/cmsis_nvic.c
- Revision:
- 18:6a4db94011d3
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed-dev/targets/TARGET_STM/TARGET_STM32F0/TARGET_DISCO_F051R8/device/cmsis_nvic.c Sun May 14 23:18:57 2017 +0000 @@ -0,0 +1,56 @@ +/* mbed Microcontroller Library + * CMSIS-style functionality to support dynamic vectors + ******************************************************************************* + * Copyright (c) 2015, 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 + +void NVIC_SetVector(IRQn_Type IRQn, uint32_t vector) { + int i; + + // Copy and switch to dynamic vectors if first time called + if ((SYSCFG->CFGR1 & SYSCFG_CFGR1_MEM_MODE) != SYSCFG_CFGR1_MEM_MODE) { + uint32_t *old_vectors = (uint32_t *)NVIC_FLASH_VECTOR_ADDRESS; + for (i = 0; i < NVIC_NUM_VECTORS; i++) { + *((uint32_t *)(NVIC_RAM_VECTOR_ADDRESS + (i*4))) = old_vectors[i]; + } + SYSCFG->CFGR1 |= SYSCFG_CFGR1_MEM_MODE; // Embedded SRAM mapped at 0x00000000 + } + + // Set the vector + *((uint32_t *)(NVIC_RAM_VECTOR_ADDRESS + (IRQn*4) + (NVIC_USER_IRQ_OFFSET*4))) = vector; +} + +uint32_t NVIC_GetVector(IRQn_Type IRQn) { + uint32_t *vectors = (uint32_t*)NVIC_RAM_VECTOR_ADDRESS; + // Return the vector + return vectors[IRQn + 16]; +}