フレフレ赤外線リモコン送信機 Rev.2

// Mega168 Ir-LED Remote Contorller Unit ( Transmitter )

// AVR Device : ATmega168 @ CK 1MHz ( or 8MHz )

// OC1B(PB2) : IR-LED

// PB0, PB1 : LED    1:ON, 0:OFF

// PB6 : Command Select Switch 

// ADC0, ADC1 (PIN23, 24)

#include <avr/io.h>

#include <avr/interrupt.h>

#define led0_on() ( PORTB |= (1<<PB0) )

#define led0_off() ( PORTB &= ~(1<<PB0) )

#define is_sw() (PINB & (1<<PB6))

#define irled_on() ( PORTB |= (1<<PB2) )

#define irled_off() ( PORTB &= ~(1<<PB2) )

#define ADC_VAL_MIN 0x60

#define ADC_VAL_MAX 0xb0

volatile unsigned int TIMER1F = 0;

ISR(TIMER1_COMPA_vect)

{

  TIMER1F++;

}

//#define FREQ38KHZ 96 // (CK 8Mhz) value of OCR1A at 38kHz Frequency  

#define FREQ38KHZ 12 // (CK 1Mhz) value of OCR1A at 38kHz Frequency  

#define FREQZERO 0 // value of OCR1A at No Frequency  

void init_timer1_ctc(void)

// Timer/Counter1 を CTC (Clear Timer on Compare mode)モードで初期化

{

  // Freq = IOclock (1MHz or 8MHz) / 2N(1 + OCR1A) , N=1(no Prescaling)

  TCCR1A = (0<<WGM11) | (0<<WGM10) | (0<<COM1A1) | (0<<COM1A0) | (0<<COM1B1) | (1<<COM1B0);

  TCCR1B = (0<<WGM13) | (1<<WGM12) | (0<<CS12) | (0<<CS11) | (1<<CS10);

  OCR1A = FREQ38KHZ; OCR1B = 0x0000; // Freq. 38kHz

  TIMSK1 |= (1<<OCIE1A);

}

void connect_OC1(void)

{

  TCCR1A = (0<<WGM11) | (0<<WGM10) | (0<<COM1A1) | (0<<COM1A0) | (0<<COM1B1) | (1<<COM1B0);

}

void disconnect_OC1(void)

{

  TCCR1A = (0<<WGM11) | (0<<WGM10) | (0<<COM1A1) | (0<<COM1A0) | (0<<COM1B1) | (0<<COM1B0);

}

#define PULSEWIDTH 100 // Signal Pulse Interval (Number of  TIMER1 Interrupt) 

#define BLANKWIDTH 1500 // Signal blank Interval (Number of  TIMER1 Interrupt) 

void out_bit_1(void)

{

  connect_OC1();

  TIMER1F = 0;

  while( TIMER1F < PULSEWIDTH);

}

void out_bit_0(void)

{

  disconnect_OC1();

  TIMER1F = 0;

  while( TIMER1F < PULSEWIDTH);

}

void out_blank(void)

{

  disconnect_OC1();

  TIMER1F = 0;

  while( TIMER1F < BLANKWIDTH );

}

void output_command_pattern(uint8_t bit_pattern)

{

  out_bit_1();//START bit

  if ( bit_pattern & 0x01) {

  out_bit_1();

  } else {

    out_bit_0();

  }

  if ( bit_pattern & 0x02 ) {

   out_bit_1();

  } else {

  out_bit_0();

  }

  if ( bit_pattern & 0x04 ) {

    out_bit_1();

  } else {

   out_bit_0();

  }

  if ( bit_pattern & 0x08 ) {

   out_bit_1();

  } else {

   out_bit_0();

  }

  out_blank();

}

void init_adc(void)

{

  // AD Conv. Enable & Clock ferquency and the input clock to the ADC)

  ADCSRA = ( (1<<ADEN) | (1<<ADPS2) | (1<<ADPS1) | (0<<ADPS0) ); 

}

uint8_t get_ad(char adcport)

// arg:   adcport : 0 - 

{

  cli(); // Disable Interrupt

  ADMUX = (1<<ADLAR) | adcport; // AD-Conv. 8-bit precision, Use ADC-PORT0

  ADCSRA |= (1<<ADIF); // Set ADC Interrupt flag

  ADCSRA |= (1<<ADSC); // Start AD Conv.

  while ( ( ADCSRA & (1<<ADIF) ) == 0); //Wait to complete adc

  sei(); //Enable Interrupt

  return (uint8_t)ADCH; // 8-bit precision

} 

#define COMMAND06 0x06

#define COMMAND09 0x09

int main(void)

{

  uint8_t s0, s1;

  uint8_t command = COMMAND06;

  init_timer1_ctc(); // CTC mode 

  init_adc(); // ADC port initialize

  // PORTB2, 1, 0 を出力モード, PORTB6 Input mode Pullup Resister ON

  PORTB |= (1<<PB6);

  DDRB = (1<<PB2) | (1<<PB1)| (1<<PB0);

  // PORTC0,1,2,3 Input mode

  PORTC = 0xff;

  DDRC = ~( (1<<PC0) | (1<<PC1) | (1<<PC2) | (1<<PC3) );

  // PORTD2, 3 Input mode

  PORTD = 0xff;

  DDRD = ( (0<<PD2) | (0<<PD3) );

  disconnect_OC1(); OCR1A = 0; led0_off(); // At First, No OUTPUT

  sei(); // interrupt enable

  while(1) {

  // Setup Command code

  if (is_sw()) {

    command = COMMAND06;

  } else {

    command = COMMAND09;

  }

  // Detect Vibration

  s0 = get_ad(0x00); // ADC0

  s1 = get_ad(0x01); // ADC1

  // Control Signal Output

  if ( (ADC_VAL_MIN < s0 && s0 < ADC_VAL_MAX) ||

    (ADC_VAL_MIN < s1 && s1 < ADC_VAL_MAX)) {

    disconnect_OC1();

    OCR1A = 0;

    led0_off();

  } else {

    led0_on();

    OCR1A = FREQ38KHZ;

    output_command_pattern(command);

    output_command_pattern(command);

    output_command_pattern(command);

    output_command_pattern(command);

    output_command_pattern(command);

    }

  }

  return 0;

}

# AVR-GCC Makefile

PROJECT=transmitter-mega168

SOURCES=transmitter-mega168.c

CC=avr-gcc

OBJCOPY=avr-objcopy

MMCU=atmega168

TARGETDEV=m168P

CFLAGS=-mmcu=$(MMCU) -Wall

$(PROJECT).hex: $(PROJECT).out

$(PROJECT).out: $(SOURCES)

program: $(PROJECT).hex

clean:

// INT0/PD2 : Ir-remote controller unit ( Reciever )

// PB4, PB3 : Motor driver

// PB0 : LED

#include <avr/io.h>

#include <avr/interrupt.h>

#define led() ( PINB |= (1<<PB0) )

#define motor0_on() ( PORTB |= (1<<PB3) )

#define motor1_on() ( PORTB |= (1<<PB4) )

#define motor0_off() ( PORTB &= ~(1<<PB3) )

#define motor1_off() ( PORTB &= ~(1<<PB4) )

#define is_ir() ( PIND & (1<<PD2) )

volatile unsigned int TIMER1F = 0;

ISR(TIMER1_COMPA_vect)

{

  TIMER1F++;

}

//#define FREQ38KHZ 96 // (CK 8Mhz) value of OCR1A at 38kHz Frequency  

#define FREQ38KHZ 12 // (CK 1Mhz) value of OCR1A at 38kHz Frequency  

#define FREQZERO 0 // value of OCR1A at No Frequency  

void init_timer1_ctc(void)

// Timer/Counter1 を CTC (Clear Timer on Compare mode)モードで初期化

{

  // Freq = IOclock (1MHz or 8MHz) / 2N(1 + OCR1A) , N=1(no Prescaling)

  TCCR1A = (0<<WGM11) | (0<<WGM10) | (0<<COM1A1) | (0<<COM1A0) | (0<<COM1B1) | (0<<COM1B0);

  TCCR1B = (0<<WGM13) | (1<<WGM12) | (0<<CS12) | (0<<CS11) | (1<<CS10);

  OCR1A = FREQ38KHZ; OCR1B = 0x0000; // Freq. 38kHz

  TIMSK |= (1<<OCIE1A);

}

#define PULSEWIDTH 100 // Signal Pulse Interval (Number of  TIMER1 Interrupt) 

#define BLANKWIDTH 1000 // Signal blank Interval (Number of  TIMER1 Interrupt) 

#define COMMANDWIDTH 2000 // Signal COMMAND Sequence Period (Number of  TIMER1 Interrupt) 

#define PATTERN_NG 0xff

uint8_t get_data(void)

{

  uint8_t d = 0;

  uint8_t i;

   if ( is_ir() ) {

      led_off();

      // Search blank period

      TIMER1F = 0;

      while ( is_ir() ) {

        if (TIMER1F >= COMMANDWIDTH ) return PATTERN_NG;

      }

      if ( TIMER1F >= BLANKWIDTH ) {

        led_on();

        // Wait for Start Bit

        while ( is_ir() );

        for ( i = 0; i < 4; i++) {

          // Step to Next Pulse

          TIMER1F = 0; 

          while ( TIMER1F < PULSEWIDTH ) {

          // Data BIt 1

          if ( is_ir() == 0 ) {

              d |= (1<<i); led_on();

          } else {

              d |= (0<<i); led_off();

          }

      }

    }

  }

  return d;

}

uint8_t generate_bit_data(uint8_t bit_pattern)

{

  uint8_t data = 0;

  int i;

  for (i = 3; i >= 0; i-- ) {

    data |= ( ( bit_pattern & 0x01) << i);

    bit_pattern >>= 1;

  }

  return data;

}

#define COMMAND06 0x06

int main(void)

{ 

  uint8_t d, target;

  // Initialize I/O Port

  PORTD &= ~(1<<PD2);

  DDRD &= ~(1<<PD2) ; // PD2 Input Mode 

  DDRB = (1<<PB0) | (1<<PB3) | (1<<PB4);

  init_timer1_ctc();

  sei();

  while (1) {

    // Test Recieve Data Pattern

    d = get_data();

    target = generate_bit_data(COMMAND06);

    if (d == target) {

      motor0_on(); motor1_off();

    } else if (d == ( (~target) & 0x0f) ) { // reverse bit pattern

      motor0_off(); motor1_on();

    } else {

      motor0_off(); motor1_off();

    }

  }

  return 0;

}

# AVR-GCC Makefile

PROJECT=ir-reciever-tiny2313

SOURCES=ir-reciever-tiny2313.c

CC=avr-gcc

OBJCOPY=avr-objcopy

MMCU=attiny2313

TARGETDEV=t2313

CFLAGS=-mmcu=$(MMCU) -Wall

$(PROJECT).hex: $(PROJECT).out

$(PROJECT).out: $(SOURCES)

program: $(PROJECT).hex

clean: