mpu_ex1_threeSeg.c

Go to the documentation of this file.

/* --COPYRIGHT--,BSD
 * Copyright (c) 2017, Texas Instruments Incorporated
 * All rights reserved.
 *
 * 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, DATA, OR PROFITS;
 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 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.
 * --/COPYRIGHT--*/
//******************************************************************************
//******************************************************************************
 
#include "driverlib.h"
 
uint16_t *ptr = 0;
uint16_t Data =0;
 
void main(void)
{
    WDT_A_hold(WDT_A_BASE);                 // Stop WDT
 
    //Set P1.0 as an output pin.
    /*
 
     * Select Port 1
     * Set Pin 0 as output
     */
    GPIO_setAsOutputPin(
            GPIO_PORT_P1,
            GPIO_PIN0);
 
    //Set P3.5 as an output pin.
    /*
 
    * Select Port 3
    * Set Pin 5 as output
    */
 
    GPIO_setAsOutputPin(
            GPIO_PORT_P3,
            GPIO_PIN5
    );
 
    if(MPU_getInterruptStatus(MPU_BASE,MPUSEG2IFG))
    {
        //Toggle P1.0 output pin.
        /*
 
        * Select Port 1
        * Set Pin 0 as output
         */
 
        GPIO_toggleOutputOnPin(
            GPIO_PORT_P1,
            GPIO_PIN0
        );
 
        //Toggle P3.5 output pin.
        /*
 
        * Select Port 3
        * Set Pin 5 as output
         */
 
        GPIO_toggleOutputOnPin(
            GPIO_PORT_P3,
            GPIO_PIN5
        );
    }
 
    __delay_cycles(30000);                    // Delay to see toggle
 
    MPU_enablePUCOnViolation(MPU_BASE,MPU_SECOND_SEG);
 
    MPU_initThreeSegmentsParam param = {0};
    param.seg1boundary = 0x05;
    param.seg2boundary = 0x08;
    param.seg1accmask = MPU_READ|MPU_WRITE|MPU_EXEC;
    param.seg2accmask = MPU_READ;
    param.seg3accmask = MPU_READ|MPU_WRITE|MPU_EXEC;
    MPU_initThreeSegments(MPU_BASE, &param);
 
    MPU_start(MPU_BASE);
 
    Data = 0x88;
 
    // Cause an MPU violation by writing to segment 2
    ptr = (uint16_t  *)0xCC02;
    *ptr = Data;
 
 
    while(1);                                 // Code never gets here
}