Difference between revisions of "U23 2008-2/Gruppe3"

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Line 1: Line 1:
 
==Teilnehmer:==
 
==Teilnehmer:==
  
−
*David (der von weit her)
+
*David (der von weit her, FSC Laptop)
−
*Vincent (das schwarze schaf der apple familie)
+
*Vincent (das schwarze Schaf der Apple-Familie)
−
*Christian (asus notebook)
+
*[[User:ME|Christian]] (ASUS Notebook)
−
*André (der ohne beschreibung)
+
*André (der ohne Beschreibung)
 +
 
 +
 
 +
thx für das code hochladen!
  
 
== '''Abend 1:''' ==
 
== '''Abend 1:''' ==
Line 15: Line 18:
  
 
'''Beispiel:'''
 
'''Beispiel:'''
−
<source=c>
+
<source lang=c>
 
  PC3  00100000
 
  PC3  00100000
 
~PC3  11011111
 
~PC3  11011111
Line 45: Line 48:
 
}
 
}
 
</source>
 
</source>
 +
Programmbeschreibung:
 +
LED leuchtet sobald IR-Signal empfangen wird!
 +
 +
'''IR LED-Blinker mit seriell output'''
 +
<source lang=c>
 +
#include <avr/io.h>
 +
#include <avr/pgmspace.h>
 +
#include <string.h>
 +
#include <stdio.h>
 +
#include <avr/pgmspace.h>
 +
#include "uart.h"
 +
 +
 +
int main(void) {
 +
uart_init();
 +
/* unset PC3 -> IR_IN ist Input */
 +
  DDRC &= ~_BV(PC3);
 +
/* set PC4 -> Output für LED1 */ 
 +
DDRC |= _BV(PC4);
 +
 +
int led = 0;
 +
 +
while (1) {
 +
/* Wenn PIN kein Eingang verzeichnet :wird */
 +
if (PINC & _BV(PC3)) {
 +
if(led == 1) {
 +
uart_printf("LED1 aus\n");
 +
/* unset PC4 -> LED1 aus */
 +
PORTC &= ~_BV(PC4);
 +
led = 0;
 +
}
 +
}
 +
/* Wenn PIN EIngang verzeichnet */
 +
else {
 +
if(led == 0) {
 +
uart_printf("LED1 an\n");
 +
PORTC |= _BV(PC4);
 +
led = 1;
 +
}
 +
}
 +
}
 +
}
 +
</source>
 +
Programmbeschreibung:
 +
LED leuchtet sobald IR-Signal empfangen wird und gibt eine Meldung über die serielle Schnittstelle aus!
  
 
== '''Abend 3:''' ==
 
== '''Abend 3:''' ==
 +
<source lang=c>
 +
#include <avr/io.h>
 +
#include <avr/interrupt.h>
 +
#include "uart.h"
 +
 +
/* constants */
 +
#define MAX 160
 +
/* 38khz: freq = F_CPU/(2*prescaler*frequency)
 +
* 20mhz/(2*8*38khz) = ~33
 +
* real frequency: 20mhz/(2*8*33) = ~37878Hz */
 +
#define PWM_FREQ 33
 +
 +
uint8_t sending_active;
 +
 +
/*
 +
enum {
 +
    MODE_IDLE = 0,
 +
    MODE_SENDING = 1,
 +
    MODE_SLEEP = 2,
 +
} mode = MODE_IDLE;
 +
*/
 +
 +
/* set up timer 0 to generate a carrier using pwm at freq on pin OC0B (PD5) */
 +
static void ir_enable(uint8_t freq) {
 +
    /* timer 0: fast pwm mode, clear OC0B on match, prescaler 8 */
 +
    TCCR0A = _BV(WGM00) | _BV(COM0B1);
 +
    TCCR0B = _BV(CS01) | _BV(WGM02);
 +
 +
    /* set frequency */
 +
    OCR0A = freq;
 +
 +
    /* set duty-cycle to 25% */
 +
    OCR0B = freq/4;
 +
}
 +
 +
/* disable timer 0 and pwm generation */
 +
static void ir_disable(void) {
 +
    TCCR0A = 0;
 +
    TCCR0B = 0;
 +
}
 +
 +
 +
/* pin change interrupt 1 service function */
 +
ISR(PCINT1_vect)
 +
{
 +
    /* if this would be the first timing value ever recorded, and the
 +
    * state before was high (=idle), do not record the timing value
 +
    * and just reset the timer */
 +
   
 +
   
 +
            /* store current timer value in code[]
 +
        * and reset the timer */
 +
        //code[pos++] = TCNT1;
 +
        //TCNT1 = 0;
 +
 +
    /* toggle second led */
 +
    PORTD ^= _BV(PD3);
 +
   
 +
    TCNT1 = 0;
 +
   
 +
    /* disable IR interrupt */
 +
    PCMSK1 &= ~_BV(PCINT11);
 +
 +
    /* set global var */
 +
    sending_active = 1;   
 +
   
 +
    ir_enable(PWM_FREQ);
 +
   
 +
    uart_printf("jamming activated\n");
 +
}
 +
 +
/* timer 1 compare A interrupt service function */
 +
ISR(TIMER1_COMPA_vect)
 +
{
 +
    TCNT1 = 0;
 +
    if(sending_active) {
 +
        uart_printf("jamming deactivated\n");
 +
        ir_disable();
 +
        sending_active = 0;
 +
       
 +
        /* enable IR interrupt */
 +
        PCMSK1 |= _BV(PCINT11);
 +
    }
 +
}
 +
 +
int main(void)
 +
{
 +
    /* initialize uart */
 +
    uart_init();
 +
    uart_printf("rumpus ir-jammer\n");
 +
 +
    /* configure led pins as outputs and turn leds off */
 +
    DDRC |= _BV(PC4);
 +
    DDRD |= _BV(PD3) | _BV(PD6) | _BV(PD7);
 +
    PORTC &= ~_BV(PC4);
 +
    PORTD &= ~(_BV(PD3) | _BV(PD6) | _BV(PD7));
 +
 +
    /* configure ir input pin, with pullup */
 +
    DDRC &= ~_BV(PC3);
 +
    PORTC |= _BV(PC3);
 +
 +
    /* configure ir send pin as output, set low */
 +
    DDRD |= _BV(PD5);
 +
    PORTD &= ~_BV(PD5);
 +
 +
    /* set global var */
 +
    sending_active = 0;
 +
 +
    /* wait until pin is high (no ir carrier is detected) */
 +
    while(!(PINC & _BV(PC3)));
 +
 +
    /* enable pin change interrupt 1 for ir input pin (PC3/PCINT11) */
 +
    PCMSK1 |= _BV(PCINT11);
 +
    PCICR |= _BV(PCIE1);
 +
 +
    /* configure timer1 with prescaler 64 and CTC for measuring ir timings */
 +
    TCCR1B = _BV(CS11) | _BV(CS10) | _BV(WGM12);
 +
    /* configure timer action after 200ms: 20mhz/64/5 */
 +
    OCR1A = F_CPU/5/64;
 +
    /* enable OCR1A interrupt */
 +
    TIMSK1 = _BV(OCIE1A);
 +
 +
    /* signal user availability by turning on led 1 */
 +
    PORTC |= _BV(PC4);
 +
 +
    /* enable interrupts */
 +
    sei();
 +
 +
    /* signal the user that the analyzer part has started by turning led 1 on */
 +
    PORTC |= _BV(PC3);
 +
 +
    /* clear interrupt flags, enable timer1 and pin change interrupts */
 +
    TIFR1 = _BV(OCIE1A);
 +
    TIMSK1 |= _BV(OCIE1A);
 +
    PCMSK1 |= _BV(PCINT11);
 +
 +
    while(1) {
 +
 +
    }
 +
}
 +
</source>
  
 
== '''Abend 4:''' ==
 
== '''Abend 4:''' ==
  
 
== '''Abend 5:''' ==
 
== '''Abend 5:''' ==
 +
<source lang=c>
 +
#include <avr/io.h>
 +
#include <string.h>
 +
#include <stdio.h>
 +
#include <avr/pgmspace.h>
 +
#include <avr/interrupt.h>
 +
 +
#include "uart.h"
 +
 +
volatile uint8_t data[100];
 +
volatile uint8_t pos = 0;
 +
volatile uint8_t bit = 0;
 +
volatile uint8_t byte = 0;
 +
 +
enum {
 +
    IDLE      = 0,
 +
    HEADER_ON  = 1,
 +
    HEADER_OFF = 2,
 +
    DATA_HIGH  = 3,
 +
    DATA_LOW  = 4,
 +
    DONE      = 5,
 +
} state;
 +
 +
ISR(PCINT1_vect) {
 +
    if (state == IDLE) {
 +
        state = HEADER_ON;
 +
        TCNT1 = 0;
 +
    } else if (state == HEADER_ON) {
 +
        uint16_t value = TCNT1;
 +
        TCNT1 = 0;
 +
 +
        /* check if header on is ~9ms */
 +
        if (value >= 2500 && value <= 3300) {
 +
            state = HEADER_OFF;
 +
        } else {
 +
            state = IDLE;
 +
            pos = 0;
 +
            bit = 0;
 +
        }
 +
    } else if (state == HEADER_OFF) {
 +
        uint16_t value = TCNT1;
 +
        TCNT1 = 0;
 +
 +
        /* check if header off is ~4.5ms */
 +
        if (value >= 1000 && value <= 1800) {
 +
            state = DATA_HIGH;
 +
        } else {
 +
            state = IDLE;
 +
            pos = 0;
 +
            bit = 0;
 +
        }
 +
    } else if (state == DATA_HIGH) {
 +
 +
        /* INSERT CODE HERE */
 +
 +
        uint16_t value = TCNT1;
 +
        TCNT1 = 0;
 +
       
 +
        /* IR "Licht" ~560µs */
 +
        if (value >= 150  && value <= 200) {
 +
            state = DATA_LOW;
 +
        } else {
 +
            state = IDLE;
 +
            pos = 0;
 +
            bit = 0;
 +
        }
 +
    } else if (state == DATA_LOW){
 +
   
 +
        uint16_t value = TCNT1;
 +
        TCNT1 = 0;
 +
       
 +
        /* IR "aus lang" 3x~560µs => 1*/
 +
        if (value >= 490  && value <= 550) {
 +
            state = DATA_HIGH;
 +
            uart_printf("1");
 +
           
 +
            byte |= (1<<bit);
 +
            bit++;
 +
            if(bit == 8){
 +
                bit = 0;
 +
                data[pos] = byte;
 +
                ++pos;
 +
                byte = 0;
 +
            }
 +
        }
 +
        /* IR "aus kurz" ~560µs => 0*/
 +
        else if (value >= 150  && value <= 200) {
 +
            state = DATA_HIGH;
 +
            uart_printf("0");
 +
           
 +
            bit++;
 +
            if(bit == 8){
 +
                bit = 0;
 +
                data[pos] = byte;
 +
                ++pos;
 +
                byte = 0;
 +
            }       
 +
        } else {
 +
            state = IDLE;
 +
            pos = 0;
 +
            bit = 0;
 +
        }           
 +
 +
    }
 +
}
 +
 +
int main(void)
 +
{
 +
    /* initialize serial uart */
 +
    uart_init();
 +
 +
    uart_printf("booting\n");
 +
 +
    /* configure irrx as input */
 +
    DDRC &= ~_BV(PC3);
 +
 +
    /* init led pin as output */
 +
    DDRD |= _BV(PD3);
 +
 +
    /* configure ir input pin, with pullup */
 +
    DDRC &= ~_BV(PC3);
 +
    PORTC |= _BV(PC3);
 +
 +
    /* wait until pin is high (no ir carrier is detected) */
 +
    while(!(PINC & _BV(PC3)));
 +
 +
    /* enable pin change interrupt 1 for ir input pin (PC3/PCINT11) */
 +
    PCMSK1 |= _BV(PCINT11);
 +
    PCICR |= _BV(PCIE1);
 +
 +
    /* configure timer1 with prescaler 64 and CTC for measuring ir timings */
 +
    TCCR1B = _BV(CS11) | _BV(CS10) | _BV(WGM12);
 +
    /* configure timer action after 200ms: 20mhz/64/5 */
 +
    OCR1A = F_CPU/5/64;
 +
    /* enable OCR1A interrupt */
 +
    //TIMSK1 = _BV(OCIE1A);
 +
 +
    sei();
 +
 +
    state = IDLE;
 +
 +
    while(1) {
 +
        /* if ir rx is high, turn off led */
 +
        if (PINC & _BV(PC3)) {
 +
            PORTD &= ~_BV(PD3);
 +
        } else {
 +
            PORTD |= _BV(PD3);
 +
        }
 +
 +
 +
        if (uart_done == 1) {
 +
            uart_printf("\n%s\n", uart_input);
 +
            uart_len = 0;
 +
            uart_done = 0;
 +
        }
 +
    }
 +
}
 +
</source>
  
 
== '''Abend 6:''' ==
 
== '''Abend 6:''' ==

Latest revision as of 17:35, 24 November 2010

Teilnehmer:

  • David (der von weit her, FSC Laptop)
  • Vincent (das schwarze Schaf der Apple-Familie)
  • Christian (ASUS Notebook)
  • André (der ohne Beschreibung)


thx für das code hochladen!

Abend 1:

Abend 2:

Binäre Operatoren (einzelne Bits modifizieren):
Memo was DDRC &= ~_BV(PC3) bedeutet:
Legende: ~ ist Negation, & logisches UND, | logisches ODER

Beispiel: <source lang=c> 

PC3  00100000

~PC3 11011111 Alter Beispielwert: 10100110 Ergebnis Alt & ~PC3: 10000110 </source>

IR LED-Blinker <source lang=c>

  1. include <avr/io.h>

int main(void) { /* unset PC3 -> IR_IN ist Input */ 

 	DDRC &= ~_BV(PC3);

/* set PC4 -> Output für LED1 */ DDRC |= _BV(PC4);

while (1) { /* Wenn PIN kein Eingang verzeichnet :wird */ if (PINC & _BV(PC3)) { /* unset PC4 -> LED1 aus */ PORTC &= ~_BV(PC4); } /* Wenn PIN EIngang verzeichnet */ else { PORTC |= _BV(PC4); } } } </source> Programmbeschreibung: LED leuchtet sobald IR-Signal empfangen wird!

IR LED-Blinker mit seriell output <source lang=c>

  1. include <avr/io.h>
  2. include <avr/pgmspace.h>
  3. include <string.h>
  4. include <stdio.h>
  5. include <avr/pgmspace.h>
  6. include "uart.h"


int main(void) { uart_init(); /* unset PC3 -> IR_IN ist Input */ 

 	DDRC &= ~_BV(PC3);

/* set PC4 -> Output für LED1 */ DDRC |= _BV(PC4);

int led = 0;

while (1) { /* Wenn PIN kein Eingang verzeichnet :wird */ if (PINC & _BV(PC3)) { if(led == 1) { uart_printf("LED1 aus\n"); /* unset PC4 -> LED1 aus */ PORTC &= ~_BV(PC4); led = 0; } } /* Wenn PIN EIngang verzeichnet */ else { if(led == 0) { uart_printf("LED1 an\n"); PORTC |= _BV(PC4); led = 1; } } } } </source> Programmbeschreibung: LED leuchtet sobald IR-Signal empfangen wird und gibt eine Meldung über die serielle Schnittstelle aus!

Abend 3:

<source lang=c>

  1. include <avr/io.h>
  2. include <avr/interrupt.h>
  3. include "uart.h"

/* constants */

  1. define MAX 160

/* 38khz: freq = F_CPU/(2*prescaler*frequency) 

* 20mhz/(2*8*38khz) = ~33
* real frequency: 20mhz/(2*8*33) = ~37878Hz */
  1. define PWM_FREQ 33

uint8_t sending_active;

/* enum { 

   MODE_IDLE = 0,
   MODE_SENDING = 1,
   MODE_SLEEP = 2,

} mode = MODE_IDLE;

  • /

/* set up timer 0 to generate a carrier using pwm at freq on pin OC0B (PD5) */ static void ir_enable(uint8_t freq) { 

   /* timer 0: fast pwm mode, clear OC0B on match, prescaler 8 */
   TCCR0A = _BV(WGM00) | _BV(COM0B1);
   TCCR0B = _BV(CS01) | _BV(WGM02);

   /* set frequency */
   OCR0A = freq;

   /* set duty-cycle to 25% */
   OCR0B = freq/4;

}

/* disable timer 0 and pwm generation */ static void ir_disable(void) { 

   TCCR0A = 0;
   TCCR0B = 0;

}


/* pin change interrupt 1 service function */ ISR(PCINT1_vect) { 

   /* if this would be the first timing value ever recorded, and the
    * state before was high (=idle), do not record the timing value
    * and just reset the timer */
   
   
           /* store current timer value in code[]
        * and reset the timer */
       //code[pos++] = TCNT1;
       //TCNT1 = 0;

   /* toggle second led */
   PORTD ^= _BV(PD3);
   
   TCNT1 = 0;
   
   /* disable IR interrupt */
   PCMSK1 &= ~_BV(PCINT11);

   /* set global var */
   sending_active = 1;    
   
   ir_enable(PWM_FREQ);
   
   uart_printf("jamming activated\n");

}

/* timer 1 compare A interrupt service function */ ISR(TIMER1_COMPA_vect) { 

   TCNT1 = 0;
   if(sending_active) {
       uart_printf("jamming deactivated\n");
       ir_disable();
       sending_active = 0;
       
       /* enable IR interrupt */
       PCMSK1 |= _BV(PCINT11);
   }

}

int main(void) { 

   /* initialize uart */
   uart_init();
   uart_printf("rumpus ir-jammer\n");

   /* configure led pins as outputs and turn leds off */
   DDRC |= _BV(PC4);
   DDRD |= _BV(PD3) | _BV(PD6) | _BV(PD7);
   PORTC &= ~_BV(PC4);
   PORTD &= ~(_BV(PD3) | _BV(PD6) | _BV(PD7));

   /* configure ir input pin, with pullup */
   DDRC &= ~_BV(PC3);
   PORTC |= _BV(PC3);

   /* configure ir send pin as output, set low */
   DDRD |= _BV(PD5);
   PORTD &= ~_BV(PD5);

   /* set global var */
   sending_active = 0;

   /* wait until pin is high (no ir carrier is detected) */
   while(!(PINC & _BV(PC3)));

   /* enable pin change interrupt 1 for ir input pin (PC3/PCINT11) */
   PCMSK1 |= _BV(PCINT11);
   PCICR |= _BV(PCIE1);

   /* configure timer1 with prescaler 64 and CTC for measuring ir timings */
   TCCR1B = _BV(CS11) | _BV(CS10) | _BV(WGM12);
   /* configure timer action after 200ms: 20mhz/64/5 */
   OCR1A = F_CPU/5/64;
   /* enable OCR1A interrupt */
   TIMSK1 = _BV(OCIE1A);

   /* signal user availability by turning on led 1 */
   PORTC |= _BV(PC4);

   /* enable interrupts */
   sei();

   /* signal the user that the analyzer part has started by turning led 1 on */
   PORTC |= _BV(PC3);

   /* clear interrupt flags, enable timer1 and pin change interrupts */
   TIFR1 = _BV(OCIE1A);
   TIMSK1 |= _BV(OCIE1A);
   PCMSK1 |= _BV(PCINT11);

   while(1) {

   }

} </source>

Abend 4:

Abend 5:

<source lang=c>

  1. include <avr/io.h>
  2. include <string.h>
  3. include <stdio.h>
  4. include <avr/pgmspace.h>
  5. include <avr/interrupt.h>
  1. include "uart.h"

volatile uint8_t data[100]; volatile uint8_t pos = 0; volatile uint8_t bit = 0; volatile uint8_t byte = 0;

enum { 

   IDLE       = 0,
   HEADER_ON  = 1,
   HEADER_OFF = 2,
   DATA_HIGH  = 3,
   DATA_LOW   = 4,
   DONE       = 5,

} state;

ISR(PCINT1_vect) { 

   if (state == IDLE) {
       state = HEADER_ON;
       TCNT1 = 0;
   } else if (state == HEADER_ON) {
       uint16_t value = TCNT1;
       TCNT1 = 0;

       /* check if header on is ~9ms */
       if (value >= 2500 && value <= 3300) {
           state = HEADER_OFF;
       } else {
           state = IDLE;
           pos = 0;
           bit = 0;
       }
   } else if (state == HEADER_OFF) {
       uint16_t value = TCNT1;
       TCNT1 = 0;

       /* check if header off is ~4.5ms */
       if (value >= 1000 && value <= 1800) {
           state = DATA_HIGH;
       } else {
           state = IDLE;
           pos = 0;
           bit = 0;
       }
   } else if (state == DATA_HIGH) {

       /* INSERT CODE HERE */

       uint16_t value = TCNT1;
       TCNT1 = 0;
       
       /* IR "Licht" ~560µs */
       if (value >= 150  && value <= 200) {
           state = DATA_LOW;
       } else {
           state = IDLE;
           pos = 0;
           bit = 0;
       }
   } else if (state == DATA_LOW){
   
       uint16_t value = TCNT1;
       TCNT1 = 0;
       
       /* IR "aus lang" 3x~560µs => 1*/
       if (value >= 490  && value <= 550) {
           state = DATA_HIGH;
           uart_printf("1");
           
           byte |= (1<<bit);
           bit++;
           if(bit == 8){
               bit = 0;
               data[pos] = byte;
               ++pos;
               byte = 0;
           }
       }
       /* IR "aus kurz" ~560µs => 0*/
       else if (value >= 150  && value <= 200) {
           state = DATA_HIGH;
           uart_printf("0");
           
           bit++;
           if(bit == 8){
               bit = 0;
               data[pos] = byte;
               ++pos;
               byte = 0;
           }        
       } else {
           state = IDLE;
           pos = 0;
           bit = 0;
       }            

   }

}

int main(void) { 

   /* initialize serial uart */
   uart_init();

   uart_printf("booting\n");

   /* configure irrx as input */
   DDRC &= ~_BV(PC3);

   /* init led pin as output */
   DDRD |= _BV(PD3);

   /* configure ir input pin, with pullup */
   DDRC &= ~_BV(PC3);
   PORTC |= _BV(PC3);

   /* wait until pin is high (no ir carrier is detected) */
   while(!(PINC & _BV(PC3)));

   /* enable pin change interrupt 1 for ir input pin (PC3/PCINT11) */
   PCMSK1 |= _BV(PCINT11);
   PCICR |= _BV(PCIE1);

   /* configure timer1 with prescaler 64 and CTC for measuring ir timings */
   TCCR1B = _BV(CS11) | _BV(CS10) | _BV(WGM12);
   /* configure timer action after 200ms: 20mhz/64/5 */
   OCR1A = F_CPU/5/64;
   /* enable OCR1A interrupt */
   //TIMSK1 = _BV(OCIE1A);

   sei();

   state = IDLE;

   while(1) {
       /* if ir rx is high, turn off led */
       if (PINC & _BV(PC3)) {
           PORTD &= ~_BV(PD3);
       } else {
           PORTD |= _BV(PD3);
       }



       if (uart_done == 1) {
           uart_printf("\n%s\n", uart_input);
           uart_len = 0;
           uart_done = 0;
       }
   }

} </source>

Abend 6:

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