im.c

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/*
 * im.c
 *
 *  Date: 19/06/2014
 *  Author: Fernando Biazi Nascimento
 *  Copyright © 2014 Fernando Biazi Nascimento. All rights reserved.
 *
 *  License of use and copy on file license.txt
 *
 */

/*
 * ======== Standard MSP430 includes ========
 */
#include <msp430f2274.h>

/*
 * ======== Includes ========
 */

#include "im.h"

/*
 * ======== Constants ========
 */

#define IM_DISABLE_1 0

#define IM_DISABLE_2 (0x01 || 0x02 || 0x04 || 0x08)

#define IM_DISABLE_P1 0xFF

#define IM_DISABLE_P2 0xFF

#define IM_DISABLE_ADC10 TRUE

#define IM_DISABLE_TA TRUE

#define IM_DISABLE_TB FALSE

/*
 * ======== Macros ========
 */

/*
 * ======== Types ========
 */

/*
 * ======== Global Variables ========
 */

/*
 * ======== Local Variables ========
 */

uint8_t im_saveIE1;

uint8_t im_saveIE2;

uint8_t im_saveIEP1;

uint8_t im_saveIEP2;

uint8_t im_saveIEOthers;
uint8_t im_disableCounter;

/*
 * ======== Local Functions ========
 */

/*
 * ================
 */

void im_disable_interrupt() {

  __disable_interrupt();

  if (!im_disableCounter) {

    if (IM_DISABLE_1) {
      im_saveIE1 = (IE1 & IM_DISABLE_1);
      IE1 &= ~((uint8_t) IM_DISABLE_1);
    }

    if (IM_DISABLE_2) {
      im_saveIE2 = (IE2 & IM_DISABLE_2);
      IE2 &= ~((uint8_t) IM_DISABLE_2);
    }

    if (IM_DISABLE_P1) {
      im_saveIEP1 = (P1IE & IM_DISABLE_P1);
      P1IE &= ~((uint8_t) IM_DISABLE_P1);
    }

    if (IM_DISABLE_P2) {
      im_saveIEP2 = (P2IE & IM_DISABLE_P2);
      P2IE &= ~((uint8_t) IM_DISABLE_P2);
    }

    im_saveIEOthers = 0;

    if (IM_DISABLE_ADC10) {
      if (ADC10CTL0 & ADC10IE)
        im_saveIEOthers |= 0x01;
      ADC10CTL0 &= ~(ADC10IE);
    }

    if (IM_DISABLE_TA) {
      if (TACTL & TAIE)
        im_saveIEOthers |= 0x02;
      TACTL &= ~(TAIE);
    }

    if (IM_DISABLE_TB) {
      if (TBCTL & TBIE)
        im_saveIEOthers |= 0x04;
      TBCTL &= ~(TBIE);
    }
  }

  im_disableCounter++;

  __enable_interrupt();
}

void im_enable_interrupt() {

  __disable_interrupt();

  if (im_disableCounter) {
    im_disableCounter--;

    if (!im_disableCounter) {
      IE1 |= im_saveIE1;

      IE2 |= im_saveIE2;

      P1IE |= im_saveIEP1;

      P2IE |= im_saveIEP2;

      if (im_saveIEOthers & 0x01) {
        ADC10CTL0 |= ADC10IE;
      }

      if (im_saveIEOthers & 0x02) {
        TACTL |= TAIE;
      }

      if (im_saveIEOthers & 0x04) {
        TBCTL |= TBIE;
      }
    }
  }
  __enable_interrupt();

}