Beispielprogramme 11.12.2017

20171211/Makefile

-%.elf: %.c
-	avr-gcc -Wall -Os -mmcu=atmega328p $< -o $@
-
-%.hex: %.elf
-	avr-objcopy -O ihex $< $@
-
-upload:
-	./upload.sh

20171211/blink-0.c

-#include <avr/io.h>
-
-int main (void)
-{
-  DDRD = 0x40;   /* binär: 0100 0000 */
-  PORTD = 0x40;  /* binär: 0100 0000 */
-  while (1);
-  return 0;
-}

20171211/blink-0a.c

-#include <avr/io.h>
-
-int main (void)
-{
-  DDRD = 0x40;   /* binär: 0100 0000 */
-  PORTD = 0x00;  /* binär: 0000 0000 */
-  while (1);
-  return 0;
-}

20171211/blink-1.c

-#include <avr/io.h>
-
-#define F_CPU 16000000l
-#include <util/delay.h>
-
-int main (void)
-{
-  DDRD = 0x01;
-  PORTD |= 0x01;
-  while (1)
-    {
-      _delay_ms (500);
-      PORTD &= ~0x01;
-      _delay_ms (500);
-      PORTD |= 0x01;
-    }
-  return 0;
-}

20171211/blink-10.c

-#include <avr/io.h>
-#include <avr/interrupt.h>
-#include <stdint.h>
-
-#define F_CPU 16000000l
-#include <util/delay.h>
-
-volatile uint8_t key_pressed = 0;
-
-ISR (INT0_vect)  /* PD2 */
-{
-  key_pressed = 1;
-}
-
-int main (void)
-{
-  cli ();
-  EICRA = 1 << ISC00 | 1 << ISC01;  /* INT0: steigende Flanke */
-  EIMSK = 1 << INT0;  /* INT0 einschalten */
-  sei ();
-  DDRD = 0xfb;   /* binär: 1111 1011 */
-  PORTD = 0x40;  /* binär: 0100 0000 */
-  while (1)
-    {
-      while (!key_pressed)
-        ;  /* just wait */
-      PORTD ^= 0x40;
-      key_pressed = 0;
-    }
-  return 0;
-}

20171211/blink-10.s

-	.file	"blink-10.c"
-__SP_H__ = 0x3e
-__SP_L__ = 0x3d
-__SREG__ = 0x3f
-__tmp_reg__ = 0
-__zero_reg__ = 1
-	.text
-.global	__vector_1
-	.type	__vector_1, @function
-__vector_1:
-	push r1
-	push r0
-	in r0,__SREG__
-	push r0
-	clr __zero_reg__
-	push r24
-/* prologue: Signal */
-/* frame size = 0 */
-/* stack size = 4 */
-.L__stack_usage = 4
-	ldi r24,lo8(1)
-	sts key_pressed,r24
-/* epilogue start */
-	pop r24
-	pop r0
-	out __SREG__,r0
-	pop r0
-	pop r1
-	reti
-	.size	__vector_1, .-__vector_1
-	.section	.text.startup,"ax",@progbits
-.global	main
-	.type	main, @function
-main:
-/* prologue: function */
-/* frame size = 0 */
-/* stack size = 0 */
-.L__stack_usage = 0
-/* #APP */
- ;  17 "blink-10.c" 1
-	cli
- ;  0 "" 2
-/* #NOAPP */
-	ldi r24,lo8(3)
-	sts 105,r24
-	ldi r24,lo8(1)
-	out 0x1d,r24
-/* #APP */
- ;  20 "blink-10.c" 1
-	sei
- ;  0 "" 2
-/* #NOAPP */
-	ldi r24,lo8(-5)
-	out 0xa,r24
-	ldi r24,lo8(64)
-	out 0xb,r24
-	ldi r25,lo8(64)
-.L3:
-	lds r24,key_pressed
-	tst r24
-	breq .L3
-	in r24,0xb
-	eor r24,r25
-	out 0xb,r24
-	sts key_pressed,__zero_reg__
-	rjmp .L3
-	.size	main, .-main
-.global	key_pressed
-	.section .bss
-	.type	key_pressed, @object
-	.size	key_pressed, 1
-key_pressed:
-	.zero	1
-	.ident	"GCC: (GNU) 4.9.2"
-.global __do_clear_bss

20171211/blink-11.c

-#include <avr/io.h>
-#include <avr/interrupt.h>
-#include <stdint.h>
-
-#define F_CPU 16000000l
-#include <util/delay.h>
-
-volatile uint8_t key_pressed = 0;
-
-ISR (INT0_vect)  /* PD2 */
-{
-  key_pressed = 1;
-}
-
-int main (void)
-{
-  cli ();
-  EICRA = 1 << ISC00 | 1 << ISC01;  /* INT0: steigende Flanke */
-  EIMSK = 1 << INT0;  /* INT0 einschalten */
-  sei ();
-  DDRD = 0xfb;   /* binär: 1111 1011 */
-  PORTD = 0x40;  /* binär: 0100 0000 */
-  while (1)
-    {
-      while (!key_pressed)
-        ;  /* just wait */
-      _delay_ms (1);
-      PORTD ^= 0x40;
-      key_pressed = 0;
-    }
-  return 0;
-}

20171211/blink-2.c

-#include <avr/io.h>
-
-#define F_CPU 16000000l
-#include <util/delay.h>
-
-int main (void)
-{
-  DDRD = 0x02;
-  PORTD = 0x02;
-  while (1)
-    {
-      _delay_ms (500);
-      PORTD ^= 0x02;
-    }
-  return 0;
-}

20171211/blink-3.c

-#include <avr/io.h>
-
-#define F_CPU 16000000
-#include <util/delay.h>
-
-int main (void)
-{
-  DDRD = 0x01;
-  PORTD = 0x01;
-  while (1)
-    {
-      while ((PIND & 0x02) == 0)
-        ; /* just wait */
-      PORTD ^= 0x01;
-    }
-  return 0;
-}

20171211/blink-4.c

-#include <avr/io.h>
-
-#define F_CPU 16000000
-#include <util/delay.h>
-
-int main (void)
-{
-  DDRD = 0x01;
-  PORTD = 0x01;
-  while (1)
-    {
-      while ((PIND & 0x02) == 0)
-        ; /* just wait */
-      PORTD ^= 0x01;
-      _delay_ms (200);
-    }
-  return 0;
-}

20171211/blink-4a.c

-#include <avr/io.h>
-
-#define F_CPU 16000000
-#include <util/delay.h>
-
-int main (void)
-{
-  DDRD = 0x01;   /* 00000001 */
-  PORTD = 0x03;  /* 00000011 */
-  while (1)
-    {
-      while ((PIND & 0x02) == 0)
-        ; /* just wait */
-      PORTD ^= 0x01;
-      _delay_ms (200);
-    }
-  return 0;
-}

20171211/blink-4b.c

-#include <avr/io.h>
-
-#define F_CPU 16000000
-#include <util/delay.h>
-
-int main (void)
-{
-  DDRD = 0x01;   /* 00000001 */
-  PORTD = 0x03;  /* 00000011 */
-  while (1)
-    ;  /* just wait */
-  return 0;
-}

20171211/blink-4c.c

-#include <avr/io.h>
-
-#define F_CPU 16000000
-#include <util/delay.h>
-
-int main (void)
-{
-  DDRD = 0x01;   /* 00000001 */
-  PORTD = 0x03;  /* 00000011 */
-  while (1)
-    {
-      _delay_ms (500);
-      PORTD ^= 0x02;
-    }
-  return 0;
-}

20171211/blink-5.c

-#include <avr/io.h>
-#include <avr/interrupt.h>
-
-ISR (TIMER0_COMPB_vect)
-{
-  PORTD ^= 0x40;
-}
-
-int main (void)
-{
-  cli ();
-  TCCR0B = (1 << CS01) | (1 << CS00);  /* Takt durch 64 dividieren */
-  TIMSK0 = 1 << OCIE0B;  /* Interrupt einschalten */
-  sei ();
-  DDRD = 0xfd;   /* binär: 1111 1101 */
-  PORTD = 0x40;  /* binär: 0100 0000 */
-  while (1);
-  return 0;
-}

20171211/blink-5a.c

-#include <avr/io.h>
-#include <avr/interrupt.h>
-
-ISR (TIMER0_COMPB_vect)
-{
-  PORTD ^= 0x40;
-}
-
-int main (void)
-{
-  DDRD = 0xfd;   /* binär: 1111 1101 */
-  PORTD = 0x40;  /* binär: 0100 0000 */
-  while (1);
-  return 0;
-}

20171211/blink-5b.c

-#include <avr/io.h>
-#include <avr/interrupt.h>
-
-ISR (TIMER0_COMPB_vect)
-{
-  PORTD ^= 0x40;
-}
-
-int main (void)
-{
-  DDRD = 0xfd;   /* binär: 1111 1101 */
-  PORTD = 0x00;  /* binär: 0000 0000 */
-  while (1);
-  return 0;
-}

20171211/blink-6.c

-#include <avr/io.h>
-#include <avr/interrupt.h>
-#include <stdint.h>
-
-ISR (TIMER0_COMPB_vect)
-{
-  static uint8_t counter = 0;
-  if (counter++ == 0)
-    PORTD ^= 0x40;
-}
-
-int main (void)
-{
-  cli ();
-  TCCR0B = (1 << CS01) | (1 << CS00);  /* Takt durch 64 dividieren */
-  TIMSK0 = 1 << OCIE0B;  /* Interrupt einschalten */
-  sei ();
-  DDRD = 0xfd;   /* binär: 1111 1101 */
-  PORTD = 0x40;  /* binär: 0100 0000 */
-  while (1);
-  return 0;
-}

20171211/blink-6a.c

-#include <avr/io.h>
-#include <avr/interrupt.h>
-#include <stdint.h>
-
-ISR (TIMER0_COMPB_vect)
-{
-  static uint8_t counter = 0;
-  if (counter++ == 0)
-    PORTD ^= 0x40;
-}
-
-int main (void)
-{
-  cli ();
-  TCCR0B = (1 << CS01) | (1 << CS00);  /* Takt durch 64 dividieren */
-  TIMSK0 = 1 << OCIE0B;  /* Interrupt einschalten */
-  sei ();
-  DDRD = 0xfd;   /* binär: 1111 1101 */
-  PORTD = 0x40;  /* binär: 0100 0000 */
-  cli ();
-  while (1);
-  return 0;
-}

20171211/blink-7.c

-#include <avr/io.h>
-#include <avr/interrupt.h>
-#include <stdint.h>
-
-ISR (INT0_vect)  /* PD2 */
-{
-  PORTD ^= 0x40;
-}
-
-int main (void)
-{
-  cli ();
-  EICRA = 1 << ISC00 | 1 << ISC01;  /* INT0: steigende Flanke */
-  EIMSK = 1 << INT0;  /* INT0 einschalten */
-  sei ();
-  DDRD = 0xfb;   /* binär: 1111 1011 */
-  PORTD = 0x40;  /* binär: 0100 0000 */
-  while (1);
-  return 0;
-}