main.c

renesas M16C62 单片机调试通过的中断源码

/*
 * Copyright (c) 2007 EISLAB - Lulea University of Technology.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification,
 * are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice,
 *    this list of conditions and the following disclaimer.
 * 2. 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.
 * 3. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
 *
 * The purpose of this program is to toggle LED via external interrupt
 *
 */

#include "sema.h"
#include "hardware.h"
#include "inthandler.h"

typedef unsigned char	uint8;
typedef unsigned short	uint16;
typedef unsigned int	uint32;

sema_t semaphores[3] = {0};

int main (void)
{
  uint8 toggle_led = 0;
  
#if MULLE_BOARD == MULLEv1
  PD8.BIT.PD8_0 = OUTPUT;		    /* setting port P80 as OUTPUT port*/		
  P8.BIT.P8_0  = LOW;			    /* set LED on port P80 ON initially*/
  
  sema_unset(INT1_SEM);			    /* unset semaphore initially */
  PUR2.BIT.PU20 = 1;
  INT1IC.BYTE = 0x03;			    /* enable interrupt1, level 3, rising edge */
#elif MULLE_BOARD == MULLEv3
  PD8.BIT.PD8_0 = OUTPUT;		    /* setting port P80 as OUTPUT port*/		
  P8.BIT.P8_0  = HIGH;			    /* set LED on port P80 ON initially*/
  
  sema_unset(INT4_SEM);			    /* unset semaphore initially */
  PD1.BIT.PD1_6 = INPUT;
  INT4IC.BYTE = 0x03;			    /* enable interrupt4, level 3, rising edge */
#endif
  asm("fset i");			    /* enable interrupts if any */


  /* main loop */
  for (;;) {

    /* check if semaphore status is set*/
#if MULLE_BOARD == MULLEv1
    if(sema_status(INT1_SEM) == SEMA_SET) {
      sema_unset(INT1_SEM);
#elif MULLE_BOARD == MULLEv3
    if(sema_status(INT4_SEM) == SEMA_SET) {
      sema_unset(INT4_SEM);
#endif
      if(toggle_led == 0) {
	P8.BIT.P8_0 = LOW;		/* set LED on port P80 on */
	toggle_led = 1;
      } else {
	P8.BIT.P8_0 = HIGH;		/* set LED on port P80 off */
	toggle_led = 0;
      }//end else
    }//end if	

  }//end main loop

}//end main