sysexc.c

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//*****************************************************************************
//
// sysexc.c - Routines for the System Exception Module.
//
// Copyright (c) 2011-2014 Texas Instruments Incorporated.  All rights reserved.
// Software License Agreement
// 
//   Redistribution and use in source and binary forms, with or without
//   modification, are permitted provided that the following conditions
//   are met:
// 
//   Redistributions of source code must retain the above copyright
//   notice, this list of conditions and the following disclaimer.
// 
//   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.
// 
//   Neither the name of Texas Instruments Incorporated 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
// OWNER 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,
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// 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.
// 
// This is part of revision 2.1.0.12573 of the Tiva Peripheral Driver Library.
//
//*****************************************************************************

//*****************************************************************************
//
//
//*****************************************************************************

#include <stdbool.h>
#include <stdint.h>
#include "inc/hw_ints.h"
#include "inc/hw_sysctl.h"
#include "inc/hw_sysexc.h"
#include "inc/hw_types.h"
#include "driverlib/debug.h"
#include "driverlib/interrupt.h"

//*****************************************************************************
//
//
//*****************************************************************************
static uint32_t
_SysExcIntNumberGet(void)
{
    uint32_t ui32Int;

    //
    // Get the interrupt number based on the class.
    //
    if(CLASS_IS_TM4C123)
    {
        ui32Int = INT_SYSEXC_TM4C123;
    }
    else if(CLASS_IS_TM4C129)
    {
        ui32Int = INT_SYSEXC_TM4C129;
    }
    else
    {
        ui32Int = 0;
    }
    return(ui32Int);
}

//*****************************************************************************
//
//
//*****************************************************************************
void
SysExcIntRegister(void (*pfnHandler)(void))
{
    uint32_t ui32Int;

    //
    // Get the system exception interrupt number.
    //
    ui32Int = _SysExcIntNumberGet();

    ASSERT(ui32Int != 0);

    //
    // Register the interrupt handler.
    //
    IntRegister(ui32Int, pfnHandler);

    //
    // Enable the system exception interrupt.
    //
    IntEnable(ui32Int);
}

//*****************************************************************************
//
//
//*****************************************************************************
void
SysExcIntUnregister(void)
{
    uint32_t ui32Int;

    //
    // Get the system exception interrupt number.
    //
    ui32Int = _SysExcIntNumberGet();

    ASSERT(ui32Int != 0);

    //
    // Disable the system exception interrupt.
    //
    IntDisable(ui32Int);

    //
    // Unregister the system exception interrupt handler.
    //
    IntUnregister(ui32Int);
}

//*****************************************************************************
//
//
//*****************************************************************************
void
SysExcIntEnable(uint32_t ui32IntFlags)
{
    //
    // Enable the specified interrupts.
    //
    HWREG(SYSEXC_IM) |= ui32IntFlags;
}

//*****************************************************************************
//
//
//*****************************************************************************
void
SysExcIntDisable(uint32_t ui32IntFlags)
{
    //
    // Disable the specified interrupts.
    //
    HWREG(SYSEXC_IM) &= ~(ui32IntFlags);
}

//*****************************************************************************
//
//
//*****************************************************************************
uint32_t
SysExcIntStatus(bool bMasked)
{
    //
    // Return either the interrupt status or the raw interrupt status as
    // requested.
    //
    if(bMasked)
    {
        return(HWREG(SYSEXC_MIS));
    }
    else
    {
        return(HWREG(SYSEXC_RIS));
    }
}

//*****************************************************************************
//
//
//*****************************************************************************
void
SysExcIntClear(uint32_t ui32IntFlags)
{
    //
    // Clear the requested interrupt sources.
    //
    HWREG(SYSEXC_IC) = ui32IntFlags;
}

//*****************************************************************************
//
// Close the Doxygen group.
//
//*****************************************************************************