Beispiele und Screenshots 2.11.2023

20231102/Makefile

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

20231102/answer.c

+#include "answer.h"
+
+int answer (void)
+{
+  return 23;
+}

20231102/answer.h

+extern int answer (void);

20231102/bc-01.txt

+cassini/home/peter/bo/2023ws/hp/20231102> bc
+bc 1.07.1
+Copyright 1991-1994, 1997, 1998, 2000, 2004, 2006, 2008, 2012-2017 Free Software Foundation, Inc.
+This is free software with ABSOLUTELY NO WARRANTY.
+For details type `warranty'.
+obase=13
+6 * 9
+42
+obase=A
+6 * 9
+54
+obase=13
+6 * 9
+42
+obase=1+1+1+1+1+1+1+1+1+1
+6 * 9
+54
+
+cassini/home/peter/bo/2023ws/hp/20231102>

20231102/bc-02.txt

+cassini/home/peter/bo/2023ws/hp/20231102> bc
+bc 1.07.1
+Copyright 1991-1994, 1997, 1998, 2000, 2004, 2006, 2008, 2012-2017 Free Software Foundation, Inc.
+This is free software with ABSOLUTELY NO WARRANTY.
+For details type `warranty'.
+obase=16
+42
+2A
+ibase=16
+B747 + A380
+15AC7
+obase=10
+5 + 5
+A
+A + A
+14
+18 + 18
+30
+ibase=1+1+1+1+1+1+1+1+1+1
+obase=10
+5 + 5
+10
+
+cassini/home/peter/bo/2023ws/hp/20231102>

20231102/bit-ops-01.c

+#include <stdio.h>
+
+int main (void)
+{
+  printf ("2 & 2 = %d\n", 2 & 2);
+  return 0;
+}

20231102/bit-ops-02.c

+#include <stdio.h>
+
+int main (void)
+{
+  printf ("2^8 = %d\n", 2^8);
+  return 0;
+}

20231102/blink-0.c

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

20231102/blink-0.hex

+:100000000C9434000C943E000C943E000C943E0082
+:100010000C943E000C943E000C943E000C943E0068
+:100020000C943E000C943E000C943E000C943E0058
+:100030000C943E000C943E000C943E000C943E0048
+:100040000C943E000C943E000C943E000C943E0038
+:100050000C943E000C943E000C943E000C943E0028
+:100060000C943E000C943E0011241FBECFEFD8E04C
+:10007000DEBFCDBF0E9440000C9444000C940000F1
+:0C00800080E48AB98BB9FFCFF894FFCF61
+:00000001FF

20231102/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

20231102/gtk-01.c

+#include <gtk/gtk.h>
+
+static void activate (GtkApplication *app, gpointer user_data)
+{
+  GtkWidget *window = gtk_application_window_new (app);
+  gtk_window_set_title (GTK_WINDOW (window), "Hello");
+  gtk_window_present (GTK_WINDOW (window));
+}
+
+int main (int argc, char **argv)
+{
+  GtkApplication *app = gtk_application_new ("de.hs-bochum.cvh.hp.gtk-01", G_APPLICATION_DEFAULT_FLAGS);
+  g_signal_connect (app, "activate", G_CALLBACK (activate), NULL);
+  int status = g_application_run (G_APPLICATION (app), argc, argv);
+  g_object_unref (app);
+  return status;
+}

20231102/gtk-01.txt

+cassini/home/peter/bo/2023ws/hp/20231102> gcc -Wall -O gtk-01.c -o gtk-01
+gtk-01.c:1:10: fatal error: gtk/gtk.h: Datei oder Verzeichnis nicht gefunden
+    1 | #include <gtk/gtk.h>
+      |          ^~~~~~~~~~~
+compilation terminated.
+cassini/home/peter/bo/2023ws/hp/20231102> locate gtk/gtk.h
+/usr/include/gtk-2.0/gtk/gtk.h
+/usr/include/gtk-3.0/gtk/gtk.h
+/usr/include/gtk-4.0/gtk/gtk.h
+cassini/home/peter/bo/2023ws/hp/20231102> gcc -Wall -I /usr/include/gtk-4.0 -O gtk-01.c -o gtk-01
+In file included from /usr/include/gtk-4.0/gtk/gtk.h:30,
+                 from gtk-01.c:1:
+/usr/include/gtk-4.0/gtk/css/gtkcss.h:30:10: fatal error: glib.h: Datei oder Verzeichnis nicht gefunden
+   30 | #include <glib.h>
+      |          ^~~~~~~~
+compilation terminated.
+cassini/home/peter/bo/2023ws/hp/20231102> locate glib.h
+/home/peter/bo/2012ws/rtech/material/usbstick/fdos/source/command/command/suppl/msglib.h
+/usr/include/jpeglib.h
+/usr/include/dbus-1.0/dbus/dbus-glib.h
+/usr/include/glib-2.0/glib.h
+/usr/include/harfbuzz/hb-glib.h
+cassini/home/peter/bo/2023ws/hp/20231102> gcc -Wall -I /usr/include/gtk-4.0 -I /usr/include/glib-2.0 -O gtk-01.c -o gtk-01
+In file included from /usr/include/glib-2.0/glib/galloca.h:34,
+                 from /usr/include/glib-2.0/glib.h:32,
+                 from /usr/include/gtk-4.0/gtk/css/gtkcss.h:30,
+                 from /usr/include/gtk-4.0/gtk/gtk.h:30,
+                 from gtk-01.c:1:
+/usr/include/glib-2.0/glib/gtypes.h:34:10: fatal error: glibconfig.h: Datei oder Verzeichnis nicht gefunden
+   34 | #include <glibconfig.h>
+      |          ^~~~~~~~~~~~~~
+compilation terminated.
+cassini/home/peter/bo/2023ws/hp/20231102> pkg-config --cflags --libs gtk4
+-I/usr/include/gtk-4.0 -I/usr/include/pango-1.0 -I/usr/include/glib-2.0 -I/usr/lib/x86_64-linux-gnu/glib-2.0/include -I/usr/include/harfbuzz -I/usr/include/freetype2 -I/usr/include/libpng16 -I/usr/include/libmount -I/usr/include/blkid -I/usr/include/fribidi -I/usr/include/cairo -I/usr/include/pixman-1 -I/usr/include/gdk-pixbuf-2.0 -I/usr/include/x86_64-linux-gnu -I/usr/include/graphene-1.0 -I/usr/lib/x86_64-linux-gnu/graphene-1.0/include -mfpmath=sse -msse -msse2 -pthread -lgtk-4 -lpangocairo-1.0 -lpango-1.0 -lharfbuzz -lgdk_pixbuf-2.0 -lcairo-gobject -lcairo -lgraphene-1.0 -lgio-2.0 -lgobject-2.0 -lglib-2.0 
+cassini/home/peter/bo/2023ws/hp/20231102> gcc -Wall -O -I/usr/include/gtk-4.0 -I/usr/include/pango-1.0 -I/usr/include/glib-2.0 -I/usr/lib/x86_64-linux-gnu/glib-2.0/include -I/usr/include/harfbuzz -I/usr/include/freetype2 -I/usr/include/libpng16 -I/usr/include/libmount -I/usr/include/blkid -I/usr/include/fribidi -I/usr/include/cairo -I/usr/include/pixman-1 -I/usr/include/gdk-pixbuf-2.0 -I/usr/include/x86_64-linux-gnu -I/usr/include/graphene-1.0 -I/usr/lib/x86_64-linux-gnu/graphene-1.0/include -mfpmath=sse -msse -msse2 -pthread -lgtk-4 -lpangocairo-1.0 -lpango-1.0 -lharfbuzz -lgdk_pixbuf-2.0 -lcairo-gobject -lcairo -lgraphene-1.0 -lgio-2.0 -lgobject-2.0 -lglib-2.0 gtk-01.c -o gtk-01
+/usr/bin/ld: /tmp/cc6S8nDW.o: in function `activate':
+gtk-01.c:(.text+0x7): undefined reference to `gtk_application_window_new'
+/usr/bin/ld: gtk-01.c:(.text+0xf): undefined reference to `gtk_window_get_type'
+/usr/bin/ld: gtk-01.c:(.text+0x1d): undefined reference to `g_type_check_instance_cast'
+/usr/bin/ld: gtk-01.c:(.text+0x2c): undefined reference to `gtk_window_set_title'
+/usr/bin/ld: gtk-01.c:(.text+0x37): undefined reference to `g_type_check_instance_cast'
+/usr/bin/ld: gtk-01.c:(.text+0x3f): undefined reference to `gtk_window_present'
+/usr/bin/ld: /tmp/cc6S8nDW.o: in function `main':
+gtk-01.c:(.text+0x60): undefined reference to `gtk_application_new'
+/usr/bin/ld: gtk-01.c:(.text+0x8a): undefined reference to `g_signal_connect_data'
+/usr/bin/ld: gtk-01.c:(.text+0x8f): undefined reference to `g_application_get_type'
+/usr/bin/ld: gtk-01.c:(.text+0x9a): undefined reference to `g_type_check_instance_cast'
+/usr/bin/ld: gtk-01.c:(.text+0xa7): undefined reference to `g_application_run'
+/usr/bin/ld: gtk-01.c:(.text+0xb1): undefined reference to `g_object_unref'
+collect2: error: ld returned 1 exit status
+cassini/home/peter/bo/2023ws/hp/20231102> gcc -Wall -O gtk-01.c -I/usr/include/gtk-4.0 -I/usr/include/pango-1.0 -I/usr/include/glib-2.0 -I/usr/lib/x86_64-linux-gnu/glib-2.0/include -I/usr/include/harfbuzz -I/usr/include/freetype2 -I/usr/include/libpng16 -I/usr/include/libmount -I/usr/include/blkid -I/usr/include/fribidi -I/usr/include/cairo -I/usr/include/pixman-1 -I/usr/include/gdk-pixbuf-2.0 -I/usr/include/x86_64-linux-gnu -I/usr/include/graphene-1.0 -I/usr/lib/x86_64-linux-gnu/graphene-1.0/include -mfpmath=sse -msse -msse2 -pthread -lgtk-4 -lpangocairo-1.0 -lpango-1.0 -lharfbuzz -lgdk_pixbuf-2.0 -lcairo-gobject -lcairo -lgraphene-1.0 -lgio-2.0 -lgobject-2.0 -lglib-2.0 -o gtk-01
+cassini/home/peter/bo/2023ws/hp/20231102>

20231102/gtk-01a.c

+#include <gtk/gtk.h>
+
+int main (int argc, char **argv)
+{
+  GtkApplication *app = gtk_application_new ("de.hs-bochum.cvh.hp.gtk-01", G_APPLICATION_DEFAULT_FLAGS);
+  g_signal_connect (app, "activate", G_CALLBACK (activate), NULL);
+  int status = g_application_run (G_APPLICATION (app), argc, argv);
+  g_object_unref (app);
+  return status;
+}

20231102/gtk-01b.c

+#include <gtk/gtk.h>
+#include <stdio.h>
+
+static void activate (GtkApplication *app, gpointer user_data)
+{
+  printf ("activate()\n");
+  GtkWidget *window = gtk_application_window_new (app);
+  gtk_window_set_title (GTK_WINDOW (window), "Hello");
+  gtk_window_present (GTK_WINDOW (window));
+}
+
+int main (int argc, char **argv)
+{
+  GtkApplication *app = gtk_application_new ("de.hs-bochum.cvh.hp.gtk-01", G_APPLICATION_DEFAULT_FLAGS);
+  g_signal_connect (app, "activate", G_CALLBACK (activate), NULL);
+  int status = g_application_run (G_APPLICATION (app), argc, argv);
+  g_object_unref (app);
+  return status;
+}

20231102/gtk-01c.c

+#include <gtk/gtk.h>
+#include <stdio.h>
+
+static void activate (GtkApplication *app, gpointer user_data)
+{
+  printf ("activate()\n");
+  GtkWidget *window = gtk_application_window_new (app);
+  gtk_window_set_title (GTK_WINDOW (window), "Hello");
+  gtk_window_present (GTK_WINDOW (window));
+}
+
+int main (int argc, char **argv)
+{
+  GtkApplication *app = gtk_application_new ("de.hs-bochum.cvh.hp.gtk-01", G_APPLICATION_DEFAULT_FLAGS);
+  printf ("vor g_signal_connect()\n");
+  g_signal_connect (app, "activate", G_CALLBACK (activate), NULL);
+  printf ("vor g_application_run()\n");
+  int status = g_application_run (G_APPLICATION (app), argc, argv);
+  printf ("nach g_application_run()\n");
+  g_object_unref (app);
+  return status;
+}

20231102/gtk-02.c

+#include <gtk/gtk.h>
+#include <stdio.h>
+
+static void hello (GtkWidget *this, gpointer user_data)
+{
+  char *world = user_data;
+  printf ("Hello, %s!\n", world);
+}
+
+static void activate (GtkApplication *app, gpointer user_data)
+{
+  GtkWidget *window = gtk_application_window_new (app);
+  gtk_window_set_title (GTK_WINDOW (window), "Hello");
+  GtkWidget *button = gtk_button_new_with_label ("Hello, world!");
+  g_signal_connect (button, "clicked", G_CALLBACK (hello), "world");
+  gtk_window_set_child (GTK_WINDOW (window), button);
+  gtk_window_present (GTK_WINDOW (window));
+}
+
+int main (int argc, char **argv)
+{
+  GtkApplication *app = gtk_application_new ("de.hs-bochum.cvh.hp.gtk-02", G_APPLICATION_DEFAULT_FLAGS);
+  g_signal_connect (app, "activate", G_CALLBACK (activate), NULL);
+  int status = g_application_run (G_APPLICATION (app), argc, argv);
+  g_object_unref (app);
+  return status;
+}

20231102/gtk-03.c

+#include <gtk/gtk.h>
+
+static void close_window (GtkWidget *this, gpointer user_data)
+{
+  GtkWindow *window = user_data;
+  gtk_window_destroy (window);
+}
+
+static void activate (GtkApplication *app, gpointer user_data)
+{
+  GtkWidget *window = gtk_application_window_new (app);
+  gtk_window_set_title (GTK_WINDOW (window), "Hello");
+  GtkWidget *button = gtk_button_new_with_label ("Quit");
+  g_signal_connect (button, "clicked", G_CALLBACK (close_window), window);
+  gtk_window_set_child (GTK_WINDOW (window), button);
+  gtk_window_present (GTK_WINDOW (window));
+}
+
+int main (int argc, char **argv)
+{
+  GtkApplication *app = gtk_application_new ("de.hs-bochum.cvh.hp.hello-gtk", G_APPLICATION_DEFAULT_FLAGS);
+  g_signal_connect (app, "activate", G_CALLBACK (activate), NULL);
+  int status = g_application_run (G_APPLICATION (app), argc, argv);
+  g_object_unref (app);
+  return status;
+}

20231102/gtk-04.c

+#include <gtk/gtk.h>
+
+static void activate (GtkApplication *app, gpointer user_data)
+{
+  GtkWidget *window = gtk_application_window_new (app);
+  gtk_window_set_title (GTK_WINDOW (window), "Hello");
+  GtkWidget *button = gtk_button_new_with_label ("Quit");
+  g_signal_connect_swapped (button, "clicked", G_CALLBACK (gtk_window_destroy), window);
+  gtk_window_set_child (GTK_WINDOW (window), button);
+  gtk_window_present (GTK_WINDOW (window));
+}
+
+int main (int argc, char **argv)
+{
+  GtkApplication *app = gtk_application_new ("de.hs-bochum.cvh.hp.hello-gtk", G_APPLICATION_DEFAULT_FLAGS);
+  g_signal_connect (app, "activate", G_CALLBACK (activate), NULL);
+  int status = g_application_run (G_APPLICATION (app), argc, argv);
+  g_object_unref (app);
+  return status;
+}

20231102/gtk-05.c

+#include <gtk/gtk.h>
+
+static void hello (GtkWidget *this, gpointer user_data)
+{
+  char *world = user_data;
+  printf ("Hello, %s!\n", world);
+}
+
+static void activate (GtkApplication *app, gpointer user_data)
+{
+  GtkWidget *window = gtk_application_window_new (app);
+  gtk_window_set_title (GTK_WINDOW (window), "Hello");
+
+  GtkWidget *vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 5);
+  gtk_window_set_child (GTK_WINDOW (window), vbox);
+
+  GtkWidget *hello_button = gtk_button_new_with_label ("Hello, world!");
+  g_signal_connect (hello_button, "clicked", G_CALLBACK (hello), "world");
+  gtk_box_append (GTK_BOX (vbox), hello_button);
+
+  GtkWidget *quit_button = gtk_button_new_with_label ("Quit");
+  g_signal_connect_swapped (quit_button, "clicked", G_CALLBACK (gtk_window_destroy), window);
+  gtk_box_append (GTK_BOX (vbox), quit_button);
+
+  gtk_window_present (GTK_WINDOW (window));
+}
+
+int main (int argc, char **argv)
+{
+  GtkApplication *app = gtk_application_new ("de.hs-bochum.cvh.hp.hello-gtk", G_APPLICATION_DEFAULT_FLAGS);
+  g_signal_connect (app, "activate", G_CALLBACK (activate), NULL);
+  int status = g_application_run (G_APPLICATION (app), argc, argv);
+  g_object_unref (app);
+  return status;
+}

20231102/gtk-06.c

+#include <gtk/gtk.h>
+
+static void draw (GtkDrawingArea *drawing_area, cairo_t *c,
+                  int width, int height, gpointer user_data)
+{
+  GdkRGBA red = { 1.0, 0.0, 0.0, 0.8 };
+  GdkRGBA yellow = { 1.0, 1.0, 0.0, 0.6 };
+  GdkRGBA blue = { 0.0, 0.5, 1.0, 0.4 };
+
+  gdk_cairo_set_source_rgba (c, &red);
+  cairo_rectangle (c, 10, 10, 60, 40);
+  cairo_fill (c);
+
+  gdk_cairo_set_source_rgba (c, &yellow);
+  cairo_arc (c, 65, 50, 30, 0, 2 * G_PI);
+  cairo_fill (c);
+
+  gdk_cairo_set_source_rgba (c, &blue);
+  cairo_move_to (c, 10, 70);
+  cairo_line_to (c, 70, 70);
+  cairo_line_to (c, 40, 18);
+  cairo_close_path (c);
+  cairo_fill (c);
+}
+
+static void activate (GtkApplication *app, gpointer user_data)
+{
+  GtkWidget *window = gtk_application_window_new (app);
+  gtk_window_set_title (GTK_WINDOW (window), "Hello");
+
+  GtkWidget *vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 5);
+  gtk_window_set_child (GTK_WINDOW (window), vbox);
+
+  GtkWidget *drawing_area = gtk_drawing_area_new ();
+  gtk_widget_set_size_request (drawing_area, 100, 100);
+  gtk_drawing_area_set_draw_func (GTK_DRAWING_AREA (drawing_area), draw, NULL, NULL);
+  gtk_box_append (GTK_BOX (vbox), drawing_area);
+
+  GtkWidget *quit_button = gtk_button_new_with_label ("Quit");
+  g_signal_connect_swapped (quit_button, "clicked", G_CALLBACK (gtk_window_destroy), window);
+  gtk_box_append (GTK_BOX (vbox), quit_button);
+
+  gtk_window_present (GTK_WINDOW (window));
+}
+
+int main (int argc, char **argv)
+{
+  GtkApplication *app = gtk_application_new ("de.hs-bochum.cvh.hp.hello-gtk", G_APPLICATION_DEFAULT_FLAGS);
+  g_signal_connect (app, "activate", G_CALLBACK (activate), NULL);
+  int status = g_application_run (G_APPLICATION (app), argc, argv);
+  g_object_unref (app);
+  return status;
+}