mirror of
https://github.com/portapack-mayhem/mayhem-firmware.git
synced 2024-12-15 12:38:11 +00:00
82 lines
2.6 KiB
C
82 lines
2.6 KiB
C
|
/*
|
||
|
|
ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010,
|
||
|
|
2011,2012,2013 Giovanni Di Sirio.
|
||
|
|
|
||
|
|
This file is part of ChibiOS/RT.
|
||
|
|
|
||
|
|
ChibiOS/RT is free software; you can redistribute it and/or modify
|
||
|
|
it under the terms of the GNU General Public License as published by
|
||
|
|
the Free Software Foundation; either version 3 of the License, or
|
||
|
|
(at your option) any later version.
|
||
|
|
|
||
|
|
ChibiOS/RT is distributed in the hope that it will be useful,
|
||
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
|
|
GNU General Public License for more details.
|
||
|
|
|
||
|
|
You should have received a copy of the GNU General Public License
|
||
|
|
along with this program. If not, see <http://www.gnu.org/licenses/>.
|
||
|
|
|
||
|
|
---
|
||
|
|
|
||
|
|
A special exception to the GPL can be applied should you wish to distribute
|
||
|
|
a combined work that includes ChibiOS/RT, without being obliged to provide
|
||
|
|
the source code for any proprietary components. See the file exception.txt
|
||
|
|
for full details of how and when the exception can be applied.
|
||
|
|
*/
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @file common/ARMCMx/nvic.c
|
||
|
|
* @brief Cortex-Mx NVIC support code.
|
||
|
|
*
|
||
|
|
* @addtogroup COMMON_ARMCMx_NVIC
|
||
|
|
* @{
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include "ch.h"
|
||
|
|
#include "nvic.h"
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @brief Sets the priority of an interrupt handler and enables it.
|
||
|
|
* @note The parameters are not tested for correctness.
|
||
|
|
*
|
||
|
|
* @param[in] n the interrupt number
|
||
|
|
* @param[in] prio the interrupt priority mask
|
||
|
|
*/
|
||
|
|
void nvicEnableVector(uint32_t n, uint32_t prio) {
|
||
|
|
unsigned sh = (n & 3) << 3;
|
||
|
|
|
||
|
|
NVIC_IPR(n >> 2) = (NVIC_IPR(n >> 2) & ~(0xFF << sh)) | (prio << sh);
|
||
|
|
NVIC_ICPR(n >> 5) = 1 << (n & 0x1F);
|
||
|
|
NVIC_ISER(n >> 5) = 1 << (n & 0x1F);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @brief Disables an interrupt handler.
|
||
|
|
* @note The parameters are not tested for correctness.
|
||
|
|
*
|
||
|
|
* @param[in] n the interrupt number
|
||
|
|
*/
|
||
|
|
void nvicDisableVector(uint32_t n) {
|
||
|
|
unsigned sh = (n & 3) << 3;
|
||
|
|
|
||
|
|
NVIC_ICER(n >> 5) = 1 << (n & 0x1F);
|
||
|
|
NVIC_IPR(n >> 2) = NVIC_IPR(n >> 2) & ~(0xFF << sh);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @brief Changes the priority of a system handler.
|
||
|
|
* @note The parameters are not tested for correctness.
|
||
|
|
*
|
||
|
|
* @param[in] handler the system handler number
|
||
|
|
* @param[in] prio the system handler priority mask
|
||
|
|
*/
|
||
|
|
void nvicSetSystemHandlerPriority(uint32_t handler, uint32_t prio) {
|
||
|
|
unsigned sh = (handler & 3) * 8;
|
||
|
|
|
||
|
|
SCB_SHPR(handler >> 2) = (SCB_SHPR(handler >> 2) &
|
||
|
|
~(0xFF << sh)) | (prio << sh);
|
||
|
|
}
|
||
|
|
|
||
|
|
/** @} */
|