90 lines
3.3 KiB
C
90 lines
3.3 KiB
C
/*
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ChibiOS/RT - Copyright (C) 2006-2013 Giovanni Di Sirio
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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/**
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* @file common/ARMCMx/nvic.c
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* @brief Cortex-Mx NVIC support code.
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*
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* @addtogroup COMMON_ARMCMx_NVIC
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* @{
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*/
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#include "hal.h"
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/*===========================================================================*/
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/* Driver local definitions. */
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/*===========================================================================*/
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/*===========================================================================*/
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/* Driver exported variables. */
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/*===========================================================================*/
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/*===========================================================================*/
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/* Driver local types. */
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/*===========================================================================*/
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/*===========================================================================*/
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/* Driver local variables. */
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/*===========================================================================*/
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/*===========================================================================*/
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/* Driver local functions. */
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/*===========================================================================*/
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/*===========================================================================*/
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/* Driver exported functions. */
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/*===========================================================================*/
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/**
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* @brief Sets the priority of an interrupt handler and enables it.
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* @note The parameters are not tested for correctness.
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*
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* @param[in] n the interrupt number
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* @param[in] prio the interrupt priority mask
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*/
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void nvicEnableVector(IRQn_Type n, uint32_t prio) {
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NVIC->IP[n] = NVIC_PRIORITY_MASK(prio);
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NVIC->ICPR[n >> 5] = 1 << (n & 0x1F);
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NVIC->ISER[n >> 5] = 1 << (n & 0x1F);
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}
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/**
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* @brief Disables an interrupt handler.
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* @note The parameters are not tested for correctness.
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*
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* @param[in] n the interrupt number
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*/
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void nvicDisableVector(IRQn_Type n) {
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NVIC->ICER[n >> 5] = 1 << (n & 0x1F);
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NVIC->IP[n] = 0;
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}
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/**
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* @brief Changes the priority of a system handler.
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* @note The parameters are not tested for correctness.
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*
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* @param[in] handler the system handler number
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* @param[in] prio the system handler priority mask
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*/
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void nvicSetSystemHandlerPriority(IRQn_Type handler, uint32_t prio) {
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SCB->SHP[((uint32_t)(handler) & 15) - 4] = NVIC_PRIORITY_MASK(prio);
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}
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/** @} */
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