openblt/Target/Demo/ARMCM3_EFM32_Olimex_EM32G88.../Prog/irq.c

95 lines
4.2 KiB
C

/************************************************************************************//**
* \file Demo\ARMCM3_EFM32_Olimex_EM32G880F128STK_GCC\Prog\irq.c
* \brief IRQ driver source file.
* \ingroup Prog_ARMCM3_EFM32_Olimex_EM32G880F128STK_GCC
* \internal
*----------------------------------------------------------------------------------------
* C O P Y R I G H T
*----------------------------------------------------------------------------------------
* Copyright (c) 2012 by Feaser http://www.feaser.com All rights reserved
*
*----------------------------------------------------------------------------------------
* L I C E N S E
*----------------------------------------------------------------------------------------
* This file is part of OpenBLT. OpenBLT 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.
*
* OpenBLT 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 OpenBLT.
* If not, see <http://www.gnu.org/licenses/>.
*
* A special exception to the GPL is included to allow you to distribute a combined work
* that includes OpenBLT without being obliged to provide the source code for any
* proprietary components. The exception text is included at the bottom of the license
* file <license.html>.
*
* \endinternal
****************************************************************************************/
/****************************************************************************************
* Include files
****************************************************************************************/
#include "header.h" /* generic header */
/****************************************************************************************
* Local data definitions
****************************************************************************************/
/** \brief Interrupt nesting counter. Used for global interrupt en/disable. */
static unsigned char interruptNesting = 0;
/************************************************************************************//**
** \brief Enables the generation IRQ interrupts. Typically called once during
** software startup after completion of the initialization.
** \return none.
**
****************************************************************************************/
void IrqInterruptEnable(void)
{
__enable_irq();
} /*** end of IrqInterruptEnable ***/
/************************************************************************************//**
** \brief Disables the generation IRQ interrupts and stores information on
** whether or not the interrupts were already disabled before explicitly
** disabling them with this function. Normally used as a pair together
** with IrqInterruptRestore during a critical section.
** \return none.
**
****************************************************************************************/
void IrqInterruptDisable(void)
{
if (interruptNesting == 0)
{
__disable_irq();
}
interruptNesting++;
} /*** end of IrqInterruptDisable ***/
/************************************************************************************//**
** \brief Restore the generation IRQ interrupts to the setting it had prior to
** calling IrqInterruptDisable. Normally used as a pair together with
** IrqInterruptDisable during a critical section.
** \return none.
**
****************************************************************************************/
void IrqInterruptRestore(void)
{
interruptNesting--;
if (interruptNesting == 0)
{
__enable_irq();
}
} /*** end of IrqInterruptRestore ***/
/*********************************** end of irq.c **************************************/