diff --git a/20220531/Makefile b/20220531/Makefile
new file mode 100644
index 0000000000000000000000000000000000000000..7ae33df99f68fcf460324cfbb008f3f7a3863638
--- /dev/null
+++ b/20220531/Makefile
@@ -0,0 +1,8 @@
+%.elf: %.c
+ avr-gcc -Wall -Os -mmcu=atmega328p $< -o $@
+
+%.hex: %.elf
+ avr-objcopy -O ihex $< $@
+
+download:
+ ./download.sh
diff --git a/20220531/blink-01.c b/20220531/blink-01.c
new file mode 100644
index 0000000000000000000000000000000000000000..16f34fc9dcbc5aa686b879e0c5cf1d8c10a446ee
--- /dev/null
+++ b/20220531/blink-01.c
@@ -0,0 +1,18 @@
+#include <avr/io.h>
+
+#define F_CPU 8000000
+#include <util/delay.h>
+
+int main (void)
+{
+ DDRB = 0xff; // alle 8 Ausgänge als Outputs verwenden ("pinMode" für alle 8)
+ PORTB = 0x20; // Bit Nr. 5 auf 1 setzen, alle anderen auf 0 ("digitalWrite" für alle 8)
+ while (1)
+ {
+ _delay_ms (500);
+ PORTB = 0x00;
+ _delay_ms (500);
+ PORTB = 0x20;
+ }
+ return 0;
+}
diff --git a/20220531/blink-01.hex b/20220531/blink-01.hex
new file mode 100644
index 0000000000000000000000000000000000000000..c942943a9649ed82ebf4659903f1ef84e8a647f2
--- /dev/null
+++ b/20220531/blink-01.hex
@@ -0,0 +1,13 @@
+:100000000C9434000C943E000C943E000C943E0082
+:100010000C943E000C943E000C943E000C943E0068
+:100020000C943E000C943E000C943E000C943E0058
+:100030000C943E000C943E000C943E000C943E0048
+:100040000C943E000C943E000C943E000C943E0038
+:100050000C943E000C943E000C943E000C943E0028
+:100060000C943E000C943E0011241FBECFEFD8E04C
+:10007000DEBFCDBF0E9440000C9458000C940000DD
+:1000800081E080932A008BB92FEF34E39CE021506C
+:1000900030409040E1F700C000001BB82FEF34E380
+:1000A0009CE0215030409040E1F700C00000EBCFD1
+:0400B000F894FFCFF2
+:00000001FF
diff --git a/20220531/blink-02.c b/20220531/blink-02.c
new file mode 100644
index 0000000000000000000000000000000000000000..89d606a31d6be1f192c065e0482c6a087359175c
--- /dev/null
+++ b/20220531/blink-02.c
@@ -0,0 +1,18 @@
+#include <avr/io.h>
+
+#define F_CPU 8000000
+#include <util/delay.h>
+
+int main (void)
+{
+ DDRB = 0xff; // alle 8 Ausgänge als Outputs verwenden ("pinMode" für alle 8)
+ PORTB = 0x20; // Bit Nr. 5 auf 1 setzen, alle anderen auf 0 ("digitalWrite" für alle 8)
+ while (1)
+ {
+ _delay_ms (500);
+ PORTB = 0x10; // LED an Ausgang 12 an (Bit Nr. 4), alle anderen aus
+ _delay_ms (500);
+ PORTB = 0x20; // LED an Ausgang 13 an (Bit Nr. 5), alle anderen aus
+ }
+ return 0;
+}
diff --git a/20220531/blink-03.c b/20220531/blink-03.c
new file mode 100644
index 0000000000000000000000000000000000000000..a7d45c2286f348cf5e7210f3a1f6febf51a0dd7c
--- /dev/null
+++ b/20220531/blink-03.c
@@ -0,0 +1,19 @@
+#include <avr/io.h>
+
+#define F_CPU 8000000
+#include <util/delay.h>
+
+int main (void)
+{
+ DDRB = 0xff; // alle 8 Ausgänge als Outputs verwenden ("pinMode" für alle 8)
+ while (1)
+ {
+ PORTB = 0x10; // LED an Ausgang 12 an (Bit Nr. 4), alle anderen aus
+ _delay_ms (500);
+ PORTB = 0x20; // LED an Ausgang 13 an (Bit Nr. 5), alle anderen aus
+ _delay_ms (500);
+ PORTB = 0x08; // LED an Ausgang 11 an (Bit Nr. 3), alle anderen aus
+ _delay_ms (500);
+ }
+ return 0;
+}
diff --git a/20220531/blink-04.c b/20220531/blink-04.c
new file mode 100644
index 0000000000000000000000000000000000000000..c9d517480e8e98f02d6b14ea3792a6c39e5c0df1
--- /dev/null
+++ b/20220531/blink-04.c
@@ -0,0 +1,21 @@
+#include <avr/io.h>
+
+#define F_CPU 8000000
+#include <util/delay.h>
+
+int main (void)
+{
+ DDRB = 0xff; // alle 8 Ausgänge als Outputs verwenden ("pinMode" für alle 8)
+ while (1)
+ {
+ PORTB = 0x10; // LED an Ausgang 12 an (Bit Nr. 4), alle anderen aus
+ _delay_ms (500);
+ PORTB = 0x20; // LED an Ausgang 13 an (Bit Nr. 5), alle anderen aus
+ _delay_ms (500);
+ PORTB = 0x08; // LED an Ausgang 11 an (Bit Nr. 3), alle anderen aus
+ _delay_ms (500);
+ PORTB = 0x34; // LEDs an Ausgang 11, 12 und 13 an (Bit Nr. 3, 4 und 5), alle anderen aus
+ _delay_ms (500);
+ }
+ return 0;
+}
diff --git a/20220531/blink-05.c b/20220531/blink-05.c
new file mode 100644
index 0000000000000000000000000000000000000000..5395aa5f7865651b74bb6c9594185d8239a32530
--- /dev/null
+++ b/20220531/blink-05.c
@@ -0,0 +1,21 @@
+#include <avr/io.h>
+
+#define F_CPU 8000000
+#include <util/delay.h>
+
+int main (void)
+{
+ DDRB = 0xff; // alle 8 Ausgänge als Outputs verwenden ("pinMode" für alle 8)
+ while (1)
+ {
+ PORTB = 0x10; // rote LED an Ausgang 12 an (Bit Nr. 4), alle anderen aus
+ _delay_ms (500);
+ PORTB = 0x20; // interne gelbe LED an Ausgang 13 an (Bit Nr. 5), alle anderen aus
+ _delay_ms (500);
+ PORTB = 0x08; // grüne LED an Ausgang 11 an (Bit Nr. 3), alle anderen aus
+ _delay_ms (500);
+ PORTB = 0x38; // LEDs an Ausgang 11, 12 und 13 an (Bit Nr. 3, 4 und 5), alle anderen aus
+ _delay_ms (500);
+ }
+ return 0;
+}
diff --git a/20220531/blink-06.c b/20220531/blink-06.c
new file mode 100644
index 0000000000000000000000000000000000000000..d78fef9e17a69e7bfb24c6599825775160bfb57a
--- /dev/null
+++ b/20220531/blink-06.c
@@ -0,0 +1,23 @@
+#include <avr/io.h>
+
+#define F_CPU 8000000
+#include <util/delay.h>
+
+int main (void)
+{
+ DDRB = 0xff; // alle 8 Ausgänge als Outputs verwenden ("pinMode" für alle 8)
+ while (1)
+ {
+ PORTB = 0x10; // rote LED an Ausgang 12 an (Bit Nr. 4), alle anderen aus
+ _delay_ms (500);
+ PORTB = 0x20; // interne gelbe LED an Ausgang 13 an (Bit Nr. 5), alle anderen aus
+ _delay_ms (500);
+ PORTB = 0x08; // grüne LED an Ausgang 11 an (Bit Nr. 3), alle anderen aus
+ _delay_ms (500);
+ PORTB = 0x38; // LEDs an Ausgang 11, 12 und 13 an (Bit Nr. 3, 4 und 5), alle anderen aus
+ _delay_ms (500);
+ PORTB = 0x00; // alle LEDs aus
+ _delay_ms (500);
+ }
+ return 0;
+}
diff --git a/20220531/blink-07.c b/20220531/blink-07.c
new file mode 100644
index 0000000000000000000000000000000000000000..b690476db4d29837fb8846b65388b6fd046886a5
--- /dev/null
+++ b/20220531/blink-07.c
@@ -0,0 +1,24 @@
+#include <avr/io.h>
+
+#define F_CPU 8000000
+#include <util/delay.h>
+
+int main (void)
+{
+ DDRB = 0xff; // alle 8 Ausgänge als Outputs verwenden ("pinMode" für alle 8)
+ while (1)
+ {
+ PORTB = 0x00; // alle LEDs aus
+ _delay_ms (500);
+ // rote LED (Ausgang 12, Bit Nr. 4) einschalten
+ PORTB |= 0x10; // Oder-Verknüpfung mit Maske: 0001 0000 = 0x10
+ _delay_ms (500);
+ // interne gelbe LED (Ausgang 13, Bit Nr. 5) einschalten
+ PORTB |= 0x20; // Maske: 0010 0000 = 0x20
+ _delay_ms (500);
+ // grüne LED (Ausgang 11, Bit Nr. 3) einschalten
+ PORTB |= 0x08; // Maske: 0000 1000 = 0x08
+ _delay_ms (500); // digitalWrite (11, HIGH);
+ }
+ return 0;
+}
diff --git a/20220531/blink-08.c b/20220531/blink-08.c
new file mode 100644
index 0000000000000000000000000000000000000000..4e7b2d693649596fa399edb5b0a182055651b548
--- /dev/null
+++ b/20220531/blink-08.c
@@ -0,0 +1,34 @@
+#include <avr/io.h>
+
+#define F_CPU 8000000
+#include <util/delay.h>
+
+int main (void)
+{
+ DDRB = 0xff; // alle 8 Ausgänge als Outputs verwenden ("pinMode" für alle 8)
+ while (1)
+ {
+ PORTB = 0x00; // alle LEDs aus
+ _delay_ms (500);
+ // rote LED (Ausgang 12, Bit Nr. 4) einschalten
+ PORTB |= 0x10; // Oder-Verknüpfung mit Maske: 0001 0000 = 0x10
+ _delay_ms (500);
+ // interne gelbe LED (Ausgang 13, Bit Nr. 5) einschalten
+ PORTB |= 0x20; // Maske: 0010 0000 = 0x20
+ _delay_ms (500);
+ // grüne LED (Ausgang 11, Bit Nr. 3) einschalten
+ PORTB |= 0x08; // Maske: 0000 1000 = 0x08
+ _delay_ms (500); // digitalWrite (11, HIGH);
+
+ // rote LED (Ausgang 12, Bit Nr. 4) ausschalten
+ PORTB &= 0xef; // Oder-Verknüpfung mit Maske: 1110 1111 = 0xef
+ _delay_ms (500);
+ // interne gelbe LED (Ausgang 13, Bit Nr. 5) ausschalten
+ PORTB &= 0xdf; // Maske: 1101 1111 = 0xdf
+ _delay_ms (500);
+ // grüne LED (Ausgang 11, Bit Nr. 3) ausschalten
+ PORTB &= 0xf7; // Maske: 1111 0111 = 0xf7
+ _delay_ms (500); // digitalWrite (11, HIGH);
+ }
+ return 0;
+}
diff --git a/20220531/blink-asm-01.S b/20220531/blink-asm-01.S
new file mode 100644
index 0000000000000000000000000000000000000000..c05515ff90129ffed09b1281786045b31d951476
--- /dev/null
+++ b/20220531/blink-asm-01.S
@@ -0,0 +1,40 @@
+ .file "blink.c"
+__SP_H__ = 0x3e
+__SP_L__ = 0x3d
+__SREG__ = 0x3f
+__tmp_reg__ = 0
+__zero_reg__ = 1
+ .section .text.startup,"ax",@progbits
+.global pruzzel
+ .type pruzzel, @function
+pruzzel:
+/* prologue: function */
+/* frame size = 0 */
+/* stack size = 0 */
+.L__stack_usage = 0
+ ldi r24,lo8(1)
+ out 0xa,r24
+.L3:
+ out 0xb,r24
+ ldi r18,lo8(799999)
+ ldi r19,hi8(799999)
+ ldi r25,hlo8(799999)
+1: subi r18,1
+ sbci r19,0
+ sbci r25,0
+ brne 1b
+ rjmp .
+ nop
+ out 0xb,__zero_reg__
+ ldi r18,lo8(799999)
+ ldi r19,hi8(799999)
+ ldi r25,hlo8(799999)
+1: subi r18,1
+ sbci r19,0
+ sbci r25,0
+ brne 1b
+ rjmp .
+ nop
+ rjmp .L3
+ .size pruzzel, .-pruzzel
+ .ident "GCC: (GNU) 5.4.0"
diff --git a/20220531/blink-asm-01.ino b/20220531/blink-asm-01.ino
new file mode 100644
index 0000000000000000000000000000000000000000..7143e9c74e9a55a171d14de7123aa22deabd2019
--- /dev/null
+++ b/20220531/blink-asm-01.ino
@@ -0,0 +1,11 @@
+extern "C" { extern void pruzzel (); }
+
+void setup ()
+{
+ pruzzel ();
+}
+
+void loop ()
+{
+ /* empty */
+}
diff --git a/20220531/blink.c b/20220531/blink.c
new file mode 100644
index 0000000000000000000000000000000000000000..3970768da6772da0ccf8cbeaccbae49c200458f0
--- /dev/null
+++ b/20220531/blink.c
@@ -0,0 +1,18 @@
+#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;
+}
diff --git a/20220531/blink.hex b/20220531/blink.hex
new file mode 100644
index 0000000000000000000000000000000000000000..249b3aa15f72dc6a4f28f532fba154f486af5547
--- /dev/null
+++ b/20220531/blink.hex
@@ -0,0 +1,13 @@
+:100000000C9434000C943E000C943E000C943E0082
+:100010000C943E000C943E000C943E000C943E0068
+:100020000C943E000C943E000C943E000C943E0058
+:100030000C943E000C943E000C943E000C943E0048
+:100040000C943E000C943E000C943E000C943E0038
+:100050000C943E000C943E000C943E000C943E0028
+:100060000C943E000C943E0011241FBECFEFD8E04C
+:10007000DEBFCDBF0E9440000C9457000C940000DE
+:1000800081E08AB98BB92FEF34E39CE021503040F6
+:100090009040E1F700C000001BB82FEF34E39CE074
+:1000A000215030409040E1F700C00000EBCFF894C1
+:0200B000FFCF80
+:00000001FF
diff --git a/20220531/blink.s0 b/20220531/blink.s0
new file mode 100644
index 0000000000000000000000000000000000000000..6081056bb30dbeb04b343b924e83489b7a670e0f
--- /dev/null
+++ b/20220531/blink.s0
@@ -0,0 +1,495 @@
+ .file "blink.c"
+__SP_H__ = 0x3e
+__SP_L__ = 0x3d
+__SREG__ = 0x3f
+__tmp_reg__ = 0
+__zero_reg__ = 1
+ .stabs "/home/peter/bo/2022ss/rtech/20220531/",100,0,2,.Ltext0
+ .stabs "blink.c",100,0,2,.Ltext0
+ .text
+.Ltext0:
+ .stabs "gcc2_compiled.",60,0,0,0
+ .stabs "int:t(0,1)=r(0,1);-32768;32767;",128,0,0,0
+ .stabs "char:t(0,2)=r(0,2);0;127;",128,0,0,0
+ .stabs "long int:t(0,3)=@s32;r(0,3);020000000000;017777777777;",128,0,0,0
+ .stabs "unsigned int:t(0,4)=r(0,4);0;0177777;",128,0,0,0
+ .stabs "long unsigned int:t(0,5)=@s32;r(0,5);0;037777777777;",128,0,0,0
+ .stabs "__int128:t(0,6)=@s128;r(0,6);02000000000000000000000000000000000000000000;01777777777777777777777777777777777777777777;",128,0,0,0
+ .stabs "__int128 unsigned:t(0,7)=@s128;r(0,7);0;03777777777777777777777777777777777777777777;",128,0,0,0
+ .stabs "long long int:t(0,8)=@s64;r(0,8);01000000000000000000000;00777777777777777777777;",128,0,0,0
+ .stabs "long long unsigned int:t(0,9)=@s64;r(0,9);0;01777777777777777777777;",128,0,0,0
+ .stabs "short int:t(0,10)=r(0,10);-32768;32767;",128,0,0,0
+ .stabs "short unsigned int:t(0,11)=r(0,11);0;0177777;",128,0,0,0
+ .stabs "signed char:t(0,12)=@s8;r(0,12);-128;127;",128,0,0,0
+ .stabs "unsigned char:t(0,13)=@s8;r(0,13);0;255;",128,0,0,0
+ .stabs "float:t(0,14)=r(0,1);4;0;",128,0,0,0
+ .stabs "double:t(0,15)=r(0,1);4;0;",128,0,0,0
+ .stabs "long double:t(0,16)=r(0,1);4;0;",128,0,0,0
+ .stabs "short _Fract:t(0,17)=r(0,1);1;0;",128,0,0,0
+ .stabs "_Fract:t(0,18)=r(0,1);2;0;",128,0,0,0
+ .stabs "long _Fract:t(0,19)=r(0,1);4;0;",128,0,0,0
+ .stabs "long long _Fract:t(0,20)=r(0,1);8;0;",128,0,0,0
+ .stabs "unsigned short _Fract:t(0,21)=r(0,1);1;0;",128,0,0,0
+ .stabs "unsigned _Fract:t(0,22)=r(0,1);2;0;",128,0,0,0
+ .stabs "unsigned long _Fract:t(0,23)=r(0,1);4;0;",128,0,0,0
+ .stabs "unsigned long long _Fract:t(0,24)=r(0,1);8;0;",128,0,0,0
+ .stabs "_Sat short _Fract:t(0,25)=r(0,1);1;0;",128,0,0,0
+ .stabs "_Sat _Fract:t(0,26)=r(0,1);2;0;",128,0,0,0
+ .stabs "_Sat long _Fract:t(0,27)=r(0,1);4;0;",128,0,0,0
+ .stabs "_Sat long long _Fract:t(0,28)=r(0,1);8;0;",128,0,0,0
+ .stabs "_Sat unsigned short _Fract:t(0,29)=r(0,1);1;0;",128,0,0,0
+ .stabs "_Sat unsigned _Fract:t(0,30)=r(0,1);2;0;",128,0,0,0
+ .stabs "_Sat unsigned long _Fract:t(0,31)=r(0,1);4;0;",128,0,0,0
+ .stabs "_Sat unsigned long long _Fract:t(0,32)=r(0,1);8;0;",128,0,0,0
+ .stabs "short _Accum:t(0,33)=r(0,1);2;0;",128,0,0,0
+ .stabs "_Accum:t(0,34)=r(0,1);4;0;",128,0,0,0
+ .stabs "long _Accum:t(0,35)=r(0,1);8;0;",128,0,0,0
+ .stabs "long long _Accum:t(0,36)=r(0,1);8;0;",128,0,0,0
+ .stabs "unsigned short _Accum:t(0,37)=r(0,1);2;0;",128,0,0,0
+ .stabs "unsigned _Accum:t(0,38)=r(0,1);4;0;",128,0,0,0
+ .stabs "unsigned long _Accum:t(0,39)=r(0,1);8;0;",128,0,0,0
+ .stabs "unsigned long long _Accum:t(0,40)=r(0,1);8;0;",128,0,0,0
+ .stabs "_Sat short _Accum:t(0,41)=r(0,1);2;0;",128,0,0,0
+ .stabs "_Sat _Accum:t(0,42)=r(0,1);4;0;",128,0,0,0
+ .stabs "_Sat long _Accum:t(0,43)=r(0,1);8;0;",128,0,0,0
+ .stabs "_Sat long long _Accum:t(0,44)=r(0,1);8;0;",128,0,0,0
+ .stabs "_Sat unsigned short _Accum:t(0,45)=r(0,1);2;0;",128,0,0,0
+ .stabs "_Sat unsigned _Accum:t(0,46)=r(0,1);4;0;",128,0,0,0
+ .stabs "_Sat unsigned long _Accum:t(0,47)=r(0,1);8;0;",128,0,0,0
+ .stabs "_Sat unsigned long long _Accum:t(0,48)=r(0,1);8;0;",128,0,0,0
+ .stabs "void:t(0,49)=(0,49)",128,0,0,0
+ .stabs "/usr/lib/avr/include/avr/io.h",130,0,0,0
+ .stabs "/usr/lib/avr/include/avr/sfr_defs.h",130,0,0,0
+ .stabs "/usr/lib/avr/include/inttypes.h",130,0,0,0
+ .stabs "/usr/lib/gcc/avr/5.4.0/include/stdint.h",130,0,0,0
+ .stabs "/usr/lib/avr/include/stdint.h",130,0,0,0
+ .stabs "int8_t:t(5,1)=(0,12)",128,0,125,0
+ .stabs "uint8_t:t(5,2)=(0,13)",128,0,126,0
+ .stabs "int16_t:t(5,3)=(0,1)",128,0,127,0
+ .stabs "uint16_t:t(5,4)=(0,4)",128,0,128,0
+ .stabs "int32_t:t(5,5)=(0,3)",128,0,129,0
+ .stabs "uint32_t:t(5,6)=(0,5)",128,0,130,0
+ .stabs "int64_t:t(5,7)=(0,8)",128,0,132,0
+ .stabs "uint64_t:t(5,8)=(0,9)",128,0,133,0
+ .stabs "intptr_t:t(5,9)=(5,3)",128,0,146,0
+ .stabs "uintptr_t:t(5,10)=(5,4)",128,0,151,0
+ .stabs "int_least8_t:t(5,11)=(5,1)",128,0,163,0
+ .stabs "uint_least8_t:t(5,12)=(5,2)",128,0,168,0
+ .stabs "int_least16_t:t(5,13)=(5,3)",128,0,173,0
+ .stabs "uint_least16_t:t(5,14)=(5,4)",128,0,178,0
+ .stabs "int_least32_t:t(5,15)=(5,5)",128,0,183,0
+ .stabs "uint_least32_t:t(5,16)=(5,6)",128,0,188,0
+ .stabs "int_least64_t:t(5,17)=(5,7)",128,0,196,0
+ .stabs "uint_least64_t:t(5,18)=(5,8)",128,0,203,0
+ .stabs "int_fast8_t:t(5,19)=(5,1)",128,0,217,0
+ .stabs "uint_fast8_t:t(5,20)=(5,2)",128,0,222,0
+ .stabs "int_fast16_t:t(5,21)=(5,3)",128,0,227,0
+ .stabs "uint_fast16_t:t(5,22)=(5,4)",128,0,232,0
+ .stabs "int_fast32_t:t(5,23)=(5,5)",128,0,237,0
+ .stabs "uint_fast32_t:t(5,24)=(5,6)",128,0,242,0
+ .stabs "int_fast64_t:t(5,25)=(5,7)",128,0,250,0
+ .stabs "uint_fast64_t:t(5,26)=(5,8)",128,0,257,0
+ .stabs "intmax_t:t(5,27)=(5,7)",128,0,277,0
+ .stabs "uintmax_t:t(5,28)=(5,8)",128,0,282,0
+ .stabn 162,0,0,0
+ .stabn 162,0,0,0
+ .stabs "int_farptr_t:t(3,1)=(5,5)",128,0,77,0
+ .stabs "uint_farptr_t:t(3,2)=(5,6)",128,0,81,0
+ .stabn 162,0,0,0
+ .stabn 162,0,0,0
+ .stabs "/usr/lib/avr/include/avr/fuse.h",130,0,0,0
+ .stabs "__fuse_t:t(6,1)=(6,2)=s3low:(0,13),0,8;high:(0,13),8,8;extended:(0,13),16,8;;",128,0,244,0
+ .stabn 162,0,0,0
+ .stabn 162,0,0,0
+.global __mulsf3
+.global __ltsf2
+.global __gtsf2
+.global __fixunssfsi
+ .stabs "main:F(0,1)",36,0,6,main
+.global main
+ .type main, @function
+main:
+ .stabd 46,0,0
+ .stabn 68,0,7,.LM0-.LFBB1
+.LM0:
+.LFBB1:
+ push r28
+ push r29
+ in r28,__SP_L__
+ in r29,__SP_H__
+ sbiw r28,28
+ in __tmp_reg__,__SREG__
+ cli
+ out __SP_H__,r29
+ out __SREG__,__tmp_reg__
+ out __SP_L__,r28
+/* prologue: function */
+/* frame size = 28 */
+/* stack size = 30 */
+.L__stack_usage = 30
+ .stabn 68,0,8,.LM1-.LFBB1
+.LM1:
+ ldi r24,lo8(42)
+ ldi r25,0
+ ldi r18,lo8(1)
+ movw r30,r24
+ st Z,r18
+ .stabn 68,0,9,.LM2-.LFBB1
+.LM2:
+ ldi r24,lo8(43)
+ ldi r25,0
+ ldi r18,lo8(1)
+ movw r30,r24
+ st Z,r18
+.L18:
+ ldi r24,0
+ ldi r25,0
+ ldi r26,lo8(-6)
+ ldi r27,lo8(67)
+ std Y+1,r24
+ std Y+2,r25
+ std Y+3,r26
+ std Y+4,r27
+.LBB18:
+.LBB19:
+ .stabs "/usr/lib/avr/include/util/delay.h",132,0,0,.Ltext1
+.Ltext1:
+ .stabn 68,0,191,.LM3-.LFBB1
+.LM3:
+ ldi r18,0
+ ldi r19,0
+ ldi r20,lo8(-6)
+ ldi r21,lo8(68)
+ ldd r22,Y+1
+ ldd r23,Y+2
+ ldd r24,Y+3
+ ldd r25,Y+4
+ call __mulsf3
+ movw r26,r24
+ movw r24,r22
+ std Y+19,r24
+ std Y+20,r25
+ std Y+21,r26
+ std Y+22,r27
+ .stabn 68,0,192,.LM4-.LFBB1
+.LM4:
+ ldi r18,0
+ ldi r19,0
+ ldi r20,lo8(-128)
+ ldi r21,lo8(63)
+ ldd r22,Y+19
+ ldd r23,Y+20
+ ldd r24,Y+21
+ ldd r25,Y+22
+ call __ltsf2
+ tst r24
+ brge .L23
+ .stabn 68,0,193,.LM5-.LFBB1
+.LM5:
+ ldi r24,lo8(1)
+ ldi r25,0
+ std Y+24,r25
+ std Y+23,r24
+ rjmp .L4
+.L23:
+ .stabn 68,0,194,.LM6-.LFBB1
+.LM6:
+ ldi r18,0
+ ldi r19,lo8(-1)
+ ldi r20,lo8(127)
+ ldi r21,lo8(71)
+ ldd r22,Y+19
+ ldd r23,Y+20
+ ldd r24,Y+21
+ ldd r25,Y+22
+ call __gtsf2
+ cp __zero_reg__,r24
+ brge .L24
+ .stabn 68,0,197,.LM7-.LFBB1
+.LM7:
+ ldi r18,0
+ ldi r19,0
+ ldi r20,lo8(32)
+ ldi r21,lo8(65)
+ ldd r22,Y+1
+ ldd r23,Y+2
+ ldd r24,Y+3
+ ldd r25,Y+4
+ call __mulsf3
+ movw r26,r24
+ movw r24,r22
+ movw r22,r24
+ movw r24,r26
+ call __fixunssfsi
+ movw r26,r24
+ movw r24,r22
+ std Y+24,r25
+ std Y+23,r24
+ rjmp .L7
+.L8:
+ ldi r24,lo8(-56)
+ ldi r25,0
+ std Y+26,r25
+ std Y+25,r24
+.LBB20:
+.LBB21:
+ .stabs "/usr/lib/avr/include/util/delay_basic.h",132,0,0,.Ltext2
+.Ltext2:
+ .stabn 68,0,105,.LM8-.LFBB1
+.LM8:
+ ldd r24,Y+25
+ ldd r25,Y+26
+/* #APP */
+ ; 105 "/usr/lib/avr/include/util/delay_basic.h" 1
+ 1: sbiw r24,1
+ brne 1b
+ ; 0 "" 2
+/* #NOAPP */
+ std Y+26,r25
+ std Y+25,r24
+.LBE21:
+.LBE20:
+ .stabs "/usr/lib/avr/include/util/delay.h",132,0,0,.Ltext3
+.Ltext3:
+ .stabn 68,0,202,.LM9-.LFBB1
+.LM9:
+ ldd r24,Y+23
+ ldd r25,Y+24
+ sbiw r24,1
+ std Y+24,r25
+ std Y+23,r24
+.L7:
+ .stabn 68,0,198,.LM10-.LFBB1
+.LM10:
+ ldd r24,Y+23
+ ldd r25,Y+24
+ or r24,r25
+ brne .L8
+ rjmp .L9
+.L24:
+ .stabn 68,0,207,.LM11-.LFBB1
+.LM11:
+ ldd r22,Y+19
+ ldd r23,Y+20
+ ldd r24,Y+21
+ ldd r25,Y+22
+ call __fixunssfsi
+ movw r26,r24
+ movw r24,r22
+ std Y+24,r25
+ std Y+23,r24
+.L4:
+ ldd r24,Y+23
+ ldd r25,Y+24
+ std Y+28,r25
+ std Y+27,r24
+.LBB22:
+.LBB23:
+ .stabs "/usr/lib/avr/include/util/delay_basic.h",132,0,0,.Ltext4
+.Ltext4:
+ .stabn 68,0,105,.LM12-.LFBB1
+.LM12:
+ ldd r24,Y+27
+ ldd r25,Y+28
+/* #APP */
+ ; 105 "/usr/lib/avr/include/util/delay_basic.h" 1
+ 1: sbiw r24,1
+ brne 1b
+ ; 0 "" 2
+/* #NOAPP */
+ std Y+28,r25
+ std Y+27,r24
+.L9:
+.LBE23:
+.LBE22:
+.LBE19:
+.LBE18:
+ .stabs "blink.c",132,0,0,.Ltext5
+.Ltext5:
+ .stabn 68,0,13,.LM13-.LFBB1
+.LM13:
+ ldi r24,lo8(43)
+ ldi r25,0
+ movw r30,r24
+ st Z,__zero_reg__
+ ldi r24,0
+ ldi r25,0
+ ldi r26,lo8(-6)
+ ldi r27,lo8(67)
+ std Y+5,r24
+ std Y+6,r25
+ std Y+7,r26
+ std Y+8,r27
+.LBB24:
+.LBB25:
+ .stabs "/usr/lib/avr/include/util/delay.h",132,0,0,.Ltext6
+.Ltext6:
+ .stabn 68,0,191,.LM14-.LFBB1
+.LM14:
+ ldi r18,0
+ ldi r19,0
+ ldi r20,lo8(-6)
+ ldi r21,lo8(68)
+ ldd r22,Y+5
+ ldd r23,Y+6
+ ldd r24,Y+7
+ ldd r25,Y+8
+ call __mulsf3
+ movw r26,r24
+ movw r24,r22
+ std Y+9,r24
+ std Y+10,r25
+ std Y+11,r26
+ std Y+12,r27
+ .stabn 68,0,192,.LM15-.LFBB1
+.LM15:
+ ldi r18,0
+ ldi r19,0
+ ldi r20,lo8(-128)
+ ldi r21,lo8(63)
+ ldd r22,Y+9
+ ldd r23,Y+10
+ ldd r24,Y+11
+ ldd r25,Y+12
+ call __ltsf2
+ tst r24
+ brge .L25
+ .stabn 68,0,193,.LM16-.LFBB1
+.LM16:
+ ldi r24,lo8(1)
+ ldi r25,0
+ std Y+14,r25
+ std Y+13,r24
+ rjmp .L12
+.L25:
+ .stabn 68,0,194,.LM17-.LFBB1
+.LM17:
+ ldi r18,0
+ ldi r19,lo8(-1)
+ ldi r20,lo8(127)
+ ldi r21,lo8(71)
+ ldd r22,Y+9
+ ldd r23,Y+10
+ ldd r24,Y+11
+ ldd r25,Y+12
+ call __gtsf2
+ cp __zero_reg__,r24
+ brge .L26
+ .stabn 68,0,197,.LM18-.LFBB1
+.LM18:
+ ldi r18,0
+ ldi r19,0
+ ldi r20,lo8(32)
+ ldi r21,lo8(65)
+ ldd r22,Y+5
+ ldd r23,Y+6
+ ldd r24,Y+7
+ ldd r25,Y+8
+ call __mulsf3
+ movw r26,r24
+ movw r24,r22
+ movw r22,r24
+ movw r24,r26
+ call __fixunssfsi
+ movw r26,r24
+ movw r24,r22
+ std Y+14,r25
+ std Y+13,r24
+ rjmp .L15
+.L16:
+ ldi r24,lo8(-56)
+ ldi r25,0
+ std Y+16,r25
+ std Y+15,r24
+.LBB26:
+.LBB27:
+ .stabs "/usr/lib/avr/include/util/delay_basic.h",132,0,0,.Ltext7
+.Ltext7:
+ .stabn 68,0,105,.LM19-.LFBB1
+.LM19:
+ ldd r24,Y+15
+ ldd r25,Y+16
+/* #APP */
+ ; 105 "/usr/lib/avr/include/util/delay_basic.h" 1
+ 1: sbiw r24,1
+ brne 1b
+ ; 0 "" 2
+/* #NOAPP */
+ std Y+16,r25
+ std Y+15,r24
+.LBE27:
+.LBE26:
+ .stabs "/usr/lib/avr/include/util/delay.h",132,0,0,.Ltext8
+.Ltext8:
+ .stabn 68,0,202,.LM20-.LFBB1
+.LM20:
+ ldd r24,Y+13
+ ldd r25,Y+14
+ sbiw r24,1
+ std Y+14,r25
+ std Y+13,r24
+.L15:
+ .stabn 68,0,198,.LM21-.LFBB1
+.LM21:
+ ldd r24,Y+13
+ ldd r25,Y+14
+ or r24,r25
+ brne .L16
+ rjmp .L17
+.L26:
+ .stabn 68,0,207,.LM22-.LFBB1
+.LM22:
+ ldd r22,Y+9
+ ldd r23,Y+10
+ ldd r24,Y+11
+ ldd r25,Y+12
+ call __fixunssfsi
+ movw r26,r24
+ movw r24,r22
+ std Y+14,r25
+ std Y+13,r24
+.L12:
+ ldd r24,Y+13
+ ldd r25,Y+14
+ std Y+18,r25
+ std Y+17,r24
+.LBB28:
+.LBB29:
+ .stabs "/usr/lib/avr/include/util/delay_basic.h",132,0,0,.Ltext9
+.Ltext9:
+ .stabn 68,0,105,.LM23-.LFBB1
+.LM23:
+ ldd r24,Y+17
+ ldd r25,Y+18
+/* #APP */
+ ; 105 "/usr/lib/avr/include/util/delay_basic.h" 1
+ 1: sbiw r24,1
+ brne 1b
+ ; 0 "" 2
+/* #NOAPP */
+ std Y+18,r25
+ std Y+17,r24
+.L17:
+.LBE29:
+.LBE28:
+.LBE25:
+.LBE24:
+ .stabs "blink.c",132,0,0,.Ltext10
+.Ltext10:
+ .stabn 68,0,15,.LM24-.LFBB1
+.LM24:
+ ldi r24,lo8(43)
+ ldi r25,0
+ ldi r18,lo8(1)
+ movw r30,r24
+ st Z,r18
+ .stabn 68,0,16,.LM25-.LFBB1
+.LM25:
+ rjmp .L18
+ .size main, .-main
+.Lscope1:
+ .stabs "",36,0,0,.Lscope1-.LFBB1
+ .stabd 78,0,0
+ .stabs "",100,0,0,.Letext0
+.Letext0:
+ .ident "GCC: (GNU) 5.4.0"
diff --git a/20220531/blink.ss b/20220531/blink.ss
new file mode 100644
index 0000000000000000000000000000000000000000..69d0101cf145b2483cacd58405d5e84cc437134b
--- /dev/null
+++ b/20220531/blink.ss
@@ -0,0 +1,40 @@
+ .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
+ ldi r18,lo8(799999)
+ ldi r19,hi8(799999)
+ ldi r25,hlo8(799999)
+1: subi r18,1
+ sbci r19,0
+ sbci r25,0
+ brne 1b
+ rjmp .
+ nop
+ out 0xb,__zero_reg__
+ ldi r18,lo8(799999)
+ ldi r19,hi8(799999)
+ ldi r25,hlo8(799999)
+1: subi r18,1
+ sbci r19,0
+ sbci r25,0
+ brne 1b
+ rjmp .
+ nop
+ rjmp .L3
+ .size main, .-main
+ .ident "GCC: (GNU) 5.4.0"
diff --git a/20220531/download.sh b/20220531/download.sh
new file mode 100755
index 0000000000000000000000000000000000000000..770c3b5dca74ac09778be055c9d6f5adb0df293b
--- /dev/null
+++ b/20220531/download.sh
@@ -0,0 +1,3 @@
+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
diff --git a/20220531/rtech-20220531.txt b/20220531/rtech-20220531.txt
new file mode 100644
index 0000000000000000000000000000000000000000..c1288d395115ac5d82f875897edbf792efccb736
--- /dev/null
+++ b/20220531/rtech-20220531.txt
@@ -0,0 +1,4 @@
+Aus dem Datenblatt des ATMega 328P, Seite 615, erfahren wir:
+
+ Die Variable DDRD liegt an Speicherzelle 0x2a.
+ Die Variable PORTD liegt an Speicherzelle 0x2b.
diff --git a/20220531/variables-00.c b/20220531/variables-00.c
new file mode 100644
index 0000000000000000000000000000000000000000..75aed61bc741c075328db2fb6cd607868c2b2e50
--- /dev/null
+++ b/20220531/variables-00.c
@@ -0,0 +1,9 @@
+#include <stdint.h>
+
+uint8_t x = 3;
+
+int main (void)
+{
+ x = 7;
+ return 0;
+}
diff --git a/20220531/variables-00.s b/20220531/variables-00.s
new file mode 100644
index 0000000000000000000000000000000000000000..72ee0f4e5ef30630867cb765f6a103a4be737146
--- /dev/null
+++ b/20220531/variables-00.s
@@ -0,0 +1,28 @@
+ .file "variables-00.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(7) ; #include <stdint.h>
+ sts x,r24 ;
+ ldi r24,0 ; uint8_t x = 3;
+ ldi r25,0 ;
+ ret ; int main (void)
+ .size main, .-main ; {
+.global x ; x = 7;
+ .data ; return 0;
+ .type x, @object ; }
+ .size x, 1
+x:
+ .byte 3
+ .ident "GCC: (GNU) 5.4.0"
+.global __do_copy_data
diff --git a/20220531/variables-01.c b/20220531/variables-01.c
new file mode 100644
index 0000000000000000000000000000000000000000..e8cdc4ecedbcc164f2f6f2f4983c80728a33efb4
--- /dev/null
+++ b/20220531/variables-01.c
@@ -0,0 +1,9 @@
+#include <stdint.h>
+
+uint8_t x = 3;
+
+int main (void)
+{
+ x = 7;
+ return 1;
+}
diff --git a/20220531/variables-01.s b/20220531/variables-01.s
new file mode 100644
index 0000000000000000000000000000000000000000..d1b522d016898e9578ae33848302b1b91f84e7d4
--- /dev/null
+++ b/20220531/variables-01.s
@@ -0,0 +1,28 @@
+ .file "variables-01.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 ; #include <stdint.h>
+ ldi r24,lo8(7) ;
+ sts x,r24 ; uint8_t x = 3;
+ ldi r24,lo8(1) ;
+ ldi r25,0 ; int main (void)
+ ret ; {
+ .size main, .-main ; x = 7;
+.global x ; return 1;
+ .data ; }
+ .type x, @object
+ .size x, 1
+x:
+ .byte 3
+ .ident "GCC: (GNU) 5.4.0"
+.global __do_copy_data
diff --git a/20220531/variables-02.c b/20220531/variables-02.c
new file mode 100644
index 0000000000000000000000000000000000000000..7d536c93c646bec30aa1158d565e47e330effa2b
--- /dev/null
+++ b/20220531/variables-02.c
@@ -0,0 +1,9 @@
+#include <stdint.h>
+
+uint8_t x = 3;
+
+int main (void)
+{
+ x = 7;
+ return 1117;
+}
diff --git a/20220531/variables-02.s b/20220531/variables-02.s
new file mode 100644
index 0000000000000000000000000000000000000000..6815502b2762cf6f982a4705a999955fbaa4045c
--- /dev/null
+++ b/20220531/variables-02.s
@@ -0,0 +1,29 @@
+ .file "variables-02.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 ; #include <stdint.h>
+ ldi r24,lo8(7) ;
+ sts x,r24 ; uint8_t x = 3;
+ ldi r24,lo8(93) ;
+ ldi r25,lo8(4) ; int main (void)
+ ret ; {
+ .size main, .-main ; x = 7;
+.global x ; return 1117;
+ .data ; }
+ .type x, @object
+ .size x, 1
+x:
+ .byte 3 ; 4 * 256 + 93 = 1117
+ .ident "GCC: (GNU) 5.4.0" ; daher: 4 nach r25, 93 nach r24
+.global __do_copy_data
+