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/*
ChibiOS - Copyright (C) 2006..2015 Giovanni Di Sirio
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
/**
* @file common/ARMCMx/nvic.c
* @brief Cortex-Mx NVIC support code.
*
* @addtogroup COMMON_ARMCMx_NVIC
* @{
*/
#include "hal.h"
/*===========================================================================*/
/* Driver local definitions. */
/*===========================================================================*/
/*===========================================================================*/
/* Driver exported variables. */
/*===========================================================================*/
/*===========================================================================*/
/* Driver local types. */
/*===========================================================================*/
/*===========================================================================*/
/* Driver local variables. */
/*===========================================================================*/
/*===========================================================================*/
/* Driver local functions. */
/*===========================================================================*/
/*===========================================================================*/
/* Driver exported functions. */
/*===========================================================================*/
/**
* @brief Sets the priority of an interrupt handler and enables it.
*
* @param[in] n the interrupt number
* @param[in] prio the interrupt priority
*/
void nvicEnableVector(uint32_t n, uint32_t prio) {
#if defined(__CORE_CM0_H_GENERIC)
NVIC->IP[_IP_IDX(n)] = (NVIC->IP[_IP_IDX(n)] & ~(0xFFU << _BIT_SHIFT(n))) |
(NVIC_PRIORITY_MASK(prio) << _BIT_SHIFT(n));
#else
NVIC->IP[n] = NVIC_PRIORITY_MASK(prio);
#endif
NVIC->ICPR[n >> 5U] = 1U << (n & 0x1FU);
NVIC->ISER[n >> 5U] = 1U << (n & 0x1FU);
}
/**
* @brief Disables an interrupt handler.
*
* @param[in] n the interrupt number
*/
void nvicDisableVector(uint32_t n) {
NVIC->ICER[n >> 5U] = 1U << (n & 0x1FU);
#if defined(__CORE_CM0_H_GENERIC)
NVIC->IP[_IP_IDX(n)] = NVIC->IP[_IP_IDX(n)] & ~(0xFFU << _BIT_SHIFT(n));
#else
NVIC->IP[n] = 0U;
#endif
}
/**
* @brief Changes the priority of a system handler.
*
* @param[in] handler the system handler number
* @param[in] prio the system handler priority
*/
void nvicSetSystemHandlerPriority(uint32_t handler, uint32_t prio) {
osalDbgCheck(handler <= 12U);
#if defined(__CORE_CM0_H_GENERIC)
SCB->SHP[_SHP_IDX(handler)] = (SCB->SHP[_SHP_IDX(handler)] & ~(0xFFU << _BIT_SHIFT(handler))) |
(NVIC_PRIORITY_MASK(prio) << _BIT_SHIFT(handler));
#elif defined(__CORE_CM7_H_GENERIC)
SCB->SHPR[handler] = NVIC_PRIORITY_MASK(prio);
#else
SCB->SHP[handler] = NVIC_PRIORITY_MASK(prio);
#endif
}
/**
* @brief Clears a pending interrupt source.
*
* @param[in] n the interrupt number
*/
void nvicClearPending(uint32_t n) {
NVIC->ICPR[n >> 5] = 1 << (n & 0x1F);
}
/** @} */
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