Beispiele und Screenshots 5.4.2022

20220405/Makefile

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

20220405/blink.c

+#include <avr/io.h>
+
+#define F_CPU 8000000
+#include <util/delay.h>
+
+int main (void)
+{
+  DDRD = 0x01;
+  PORTD = 0x01;
+  while (1)
+    {
+      _delay_ms (500);
+      PORTD = 0x00;
+      _delay_ms (500);
+      PORTD = 0x01;
+    }
+  return 0;
+}

20220405/blink.hex

+:100000000C9434000C943E000C943E000C943E0082
+:100010000C943E000C943E000C943E000C943E0068
+:100020000C943E000C943E000C943E000C943E0058
+:100030000C943E000C943E000C943E000C943E0048
+:100040000C943E000C943E000C943E000C943E0038
+:100050000C943E000C943E000C943E000C943E0028
+:100060000C943E000C943E0011241FBECFEFD8E04C
+:10007000DEBFCDBF0E9440000C9457000C940000DE
+:1000800081E08AB98BB92FEF34E39CE021503040F6
+:100090009040E1F700C000001BB82FEF34E39CE074
+:1000A000215030409040E1F700C00000EBCFF894C1
+:0200B000FFCF80
+:00000001FF

20220405/blink.s

+	.file	"blink.c"
+__SP_H__ = 0x3e
+__SP_L__ = 0x3d
+__SREG__ = 0x3f
+__tmp_reg__ = 0
+__zero_reg__ = 1
+	.section	.text.startup,"ax",@progbits
+.global	main
+	.type	main, @function
+main:
+/* prologue: function */
+/* frame size = 0 */
+/* stack size = 0 */
+.L__stack_usage = 0
+	ldi r24,lo8(1)
+	out 0xa,r24
+.L3:
+	out 0xb,r24                   ; #include <avr/io.h>
+	ldi r18,lo8(799999)           ; 
+	ldi r19,hi8(799999)           ; #define F_CPU 8000000
+	ldi r25,hlo8(799999)          ; #include <util/delay.h>
+1:	subi r18,1                    ; 
+	sbci r19,0                    ; int main (void)
+	sbci r25,0                    ; {
+	brne 1b                       ;   DDRD = 0x01;
+	rjmp .                        ;   PORTD = 0x01;
+	nop                           ;   while (1)
+	out 0xb,__zero_reg__          ;     {
+	ldi r18,lo8(799999)           ;       _delay_ms (500);
+	ldi r19,hi8(799999)           ;       PORTD = 0x00;
+	ldi r25,hlo8(799999)          ;       _delay_ms (500);
+1:	subi r18,1                    ;       PORTD = 0x01;
+	sbci r19,0                    ;     }
+	sbci r25,0                    ;   return 0;
+	brne 1b                       ; }
+	rjmp .
+	nop
+	rjmp .L3
+	.size	main, .-main
+	.ident	"GCC: (GNU) 5.4.0"

20220405/blink.txt

+cassini/home/peter/bo/2022ss/rtech/20220405> cat blink.c
+#include <avr/io.h>
+
+#define F_CPU 8000000
+#include <util/delay.h>
+
+int main (void)
+{
+  DDRD = 0x01;
+  PORTD = 0x01;
+  while (1)
+    {
+      _delay_ms (500);
+      PORTD = 0x00;
+      _delay_ms (500);
+      PORTD = 0x01;
+    }
+  return 0;
+}
+cassini/home/peter/bo/2022ss/rtech/20220405> make blink.hex
+avr-gcc -Wall -Os -mmcu=atmega328p blink.c -o blink.elf
+avr-objcopy -O ihex blink.elf blink.hex
+rm blink.elf
+cassini/home/peter/bo/2022ss/rtech/20220405> cat blink.hex
+:100000000C9434000C943E000C943E000C943E0082
+:100010000C943E000C943E000C943E000C943E0068
+:100020000C943E000C943E000C943E000C943E0058
+:100030000C943E000C943E000C943E000C943E0048
+:100040000C943E000C943E000C943E000C943E0038
+:100050000C943E000C943E000C943E000C943E0028
+:100060000C943E000C943E0011241FBECFEFD8E04C
+:10007000DEBFCDBF0E9440000C9457000C940000DE
+:1000800081E08AB98BB92FEF34E39CE021503040F6
+:100090009040E1F700C000001BB82FEF34E39CE074
+:1000A000215030409040E1F700C00000EBCFF894C1
+:0200B000FFCF80
+:00000001FF
+cassini/home/peter/bo/2022ss/rtech/20220405> make download
+./download.sh
+avrdude -P /dev/ttyACM0 -c arduino -p m328p -U flash:w:blink.hex
+cassini/home/peter/bo/2022ss/rtech/20220405>

20220405/download.sh

+port=$(ls -rt /dev/ttyACM* | tail -1)
+echo avrdude -P $port -c arduino -p m328p -U flash:w:$(ls -rt *.hex | tail -1)
+avrdude -P $port -c arduino -p m328p -U flash:w:$(ls -rt *.hex | tail -1) 2>/dev/null

20220405/hello.c

+#include <stdio.h>
+
+int main (void)
+{
+  puts ("Hello, world!");
+  return 0;
+}