int0aa.c

瑞萨(Renesas)M16C系列芯片上实现接受摇控板控制的程序

/***********************************************************************/
/*                                                                     */
/*  FILE        :int0aa.c                                              */
/*  DATE        :Sun, Jul 27, 2008                                     */
/*  DESCRIPTION :main program file.                                    */
/*  CPU GROUP   :62P                                                   */
/*                                                                     */
/*  This file is generated by Renesas Project Generator (Ver.4.8).     */
/*                                                                     */
/***********************************************************************/

#include "sfr62p.h"

#define CNTR_IPL 0x03 // TA0 interrupt priority level

void init_int0(void)
{
#define TIME_CONFIG 0x40
    /*---   INT0 initialization  ---*/
   // int0ic = 0x01;                   /* INT0 interrupt control register  */
                                     /* xx000001                         */
                                     /*   |||+++---- interrupt priority level */
                                     /*   ||+------- interrupt request bit  */
                                     /*   |+-------- polarity select bit  */
                                     /*   |         (select falling edge)*/
                                     /*   +--------- reserved bit         */
 	
	ifsr=0x01;	//choice int0
	_asm("fclr i");
	
 	ilvl0_int0ic=0;
	ilvl1_int0ic=1;
	ilvl2_int0ic=1;
	
	ir_int0ic=0;	//enable interrupt int2
	pol_int0ic=0;	//high-->low 
	
	
	/*ifsr=0x04;	//choice int0
	_asm("fclr i");
	
 	ilvl0_int2ic=0;
	ilvl1_int2ic=1;
	ilvl2_int2ic=1;
	
	ir_int2ic=0;	//enable interrupt int2
	pol_int2ic=0;	//high-->low 
	*/
								
	_asm("fset i");
	
	/*ta0 = 10000;
	_asm (" fclr i") ; // turn off interrupts before modifying IPL
ta0ic |= CNTR_IPL; // Interrupt Control register for Timer A0
// use read-modify-write instruction to clear IPL
// (disable Timer A0 interrupts)
ta0mr = TIME_CONFIG; // Timer A0 mode register set to pulse output mode
_asm (" fset i");
ta0s = 1; // Count Start Flag register bit0, for Timer A0
/
*/	
}

void main(void)
{
	/* Port initialization */
    //p2    = 0xfe;               /* only turn on LED1          */
    pd2=0xff;               /* set Port P7 to output      */
	p2=0x55;
    pd8=0x00;                  /* set Port P8 bit2(sw9) to input */
    
	//_asm (" fclr i") ;
	
    init_int0();                /* INT0 initialization                 */
	
	//_asm (" fset i");

    /* dead loop (all the processing is done in interrupt program) */
    while(1){ 
    }
}