#include <avr/io.h>



#define kilo 1000UL

#define Mega (kilo*kilo)

#define F_CPU 16*Mega 

#include <util/delay.h>

#include <avr/interrupt.h>



#define ST0P  0

#define GO    1



#define MODE1 0

#define MODE2 1

#define MODE3 2

#define NULL 0



void current_motor(void);

void current_sw(void);

void mcu_timer2_fPWM(void);

//void mcu_timer0_ctc(void);

void mcu_exinterrupt_switch(void);

void chattering(char);



struct op

{

  volatile uint8_t state; 

  volatile uint8_t mode_sel; 

  uint8_t array_ocr2[];      

  //struct op *next;

  

}motor_op =

{

 ST0P,     

 MODE3,   //after reset "MODE3" trans to "MODE1" by INT4

 { 76,156,220 } //TCNT2(256),30%,60%,90%

};



int main()

{

  current_motor();

  current_sw();

  mcu_timer2_fPWM();

  mcu_exinterrupt_switch();

    

  struct op *ptr = &motor_op;

  DDRA = 0xff;

  

 while(1)

 {

   

  if(ptr->state)

  {

      switch(ptr->mode_sel)

      {

       case MODE1:  OCR2 = ptr->array_ocr2[0]; PORTA=0x10;  break;

       case MODE2:  OCR2 = ptr->array_ocr2[1]; PORTA=0x20;  break;

       case MODE3:  OCR2 = ptr->array_ocr2[2]; PORTA=0x40;  break;

      }

   

  

   }else   {

    PORTA ^= 0x01;

    _delay_ms(100);

   }

  }

}







void current_motor(void)

{

   DDRB = (1<<DDB6)|(0<DDB7); //for use OC2 (1<<DDB7)  //enabled by ISR(INT4_vect).

}





void mcu_timer2_fPWM(void)

{



TCCR2 = (1<<WGM21)|(1<<WGM20)|(1<<COM21)|(0<<COM20)|(1<<CS22)|(0<<CS21)|(1<<CS20); //OC2: enable (COM21:0 =2)

        //(fast mode)         ( clear:up, set:down)   (clock : 1024) = small motor didn't respond high frequency

/*--OCF2-------*/    

//TIMSK = (1<<OCR2);  //timer2: compare match interrupt enable. //ISR(TIMER2_COMP_VECT) : enable.

}



/*--ISR OCF2-------*/      

ISR(TIMER2_COMP_vect)  

{



  /*none*/



}







void current_sw(void)

{

   DDRE = 0xff;

   DDRE ^= (1<<DDE4)|(1<<DDE5);  //default: 0  //use for INT4,5 port pin function enable.

}



void mcu_exinterrupt_switch(void)

{

 EIMSK = (1<<INT4)|(1<<INT5);  // INT4,5 enable.

 EICRB = (1<<ISC41)|(0<<ISC40)|(1<<ISC51)|(0<<ISC50); //interrupt source collect, trigger: rising edge.

 sei(); 

}

void chattering(char num)

{

  EIFR= (1<<num);

  _delay_ms(30);



}



ISR(INT4_vect)                 

{                            // mode1 mode2 mode3

   static uint8_t trans_mode[3] = {MODE2,MODE3,MODE1};  

   motor_op.mode_sel = trans_mode[motor_op.mode_sel];    

                                   //stop  go

   static uint8_t trans_array[2] = { GO, GO };

   motor_op.state = trans_array[motor_op.state];     

   DDRB |= 1<<DDB7; //motor: start. (DDR: connect OC2 signal)

   chattering(4);

}



ISR(INT5_vect)                 

{                                 //mode 1 mode2 mode3

   static uint8_t trans_mode[3] = {MODE3,MODE3,MODE3};

   motor_op.mode_sel = trans_mode[motor_op.mode_sel];

                           // stop go

   static uint8_t tran_array[2] = {ST0P,ST0P};

   motor_op.state = tran_array[motor_op.state]; 

   DDRB &= 0<<DDB7; // motor: stop (DDR: cut OC2 signal)

   OCR2 = 0;

   chattering(5);

}

프로젝트 설명 : 



 



SW1을 한 번 누르면 미풍, 두번 누르면 약풍, 세번 누르면 강풍, 네번 누르면 다시 미풍이 되며, SW2를 누르면 정지가 되는 모터를 작동하고 싶은데 작동이 안됩니다ㅠ 어디가 문제인가요...