diff --git a/apps/hello5/Makefile b/apps/hello5/Makefile
new file mode 100644
index 0000000..adf2198
--- /dev/null
+++ b/apps/hello5/Makefile
@@ -0,0 +1,69 @@
+# File:   Makefile
+# Author: M. P. Hayes, UCECE
+# Date:   12 Sep 2010
+# Descr:  Makefile for hello5
+
+# Definitions.
+CC = avr-gcc
+CFLAGS = -mmcu=atmega32u2 -Os -Wall -Wstrict-prototypes -Wextra -g -I../../drivers -I../../fonts -I../../drivers/avr -I../../utils
+OBJCOPY = avr-objcopy
+SIZE = avr-size
+DEL = rm
+
+
+# Default target.
+all: hello5.out
+
+
+# Compile: create object files from C source files.
+hello5.o: hello5.c ../../drivers/avr/system.h ../../drivers/display.h ../../drivers/navswitch.h ../../fonts/font5x7_1.h ../../utils/font.h ../../utils/pacer.h ../../utils/tinygl.h
+	$(CC) -c $(CFLAGS) $< -o $@
+
+pio.o: ../../drivers/avr/pio.c ../../drivers/avr/pio.h ../../drivers/avr/system.h
+	$(CC) -c $(CFLAGS) $< -o $@
+
+system.o: ../../drivers/avr/system.c ../../drivers/avr/system.h
+	$(CC) -c $(CFLAGS) $< -o $@
+
+timer.o: ../../drivers/avr/timer.c ../../drivers/avr/system.h ../../drivers/avr/timer.h
+	$(CC) -c $(CFLAGS) $< -o $@
+
+display.o: ../../drivers/display.c ../../drivers/avr/system.h ../../drivers/display.h ../../drivers/ledmat.h
+	$(CC) -c $(CFLAGS) $< -o $@
+
+ledmat.o: ../../drivers/ledmat.c ../../drivers/avr/pio.h ../../drivers/avr/system.h ../../drivers/ledmat.h
+	$(CC) -c $(CFLAGS) $< -o $@
+
+navswitch.o: ../../drivers/navswitch.c ../../drivers/avr/delay.h ../../drivers/avr/pio.h ../../drivers/avr/system.h ../../drivers/navswitch.h
+	$(CC) -c $(CFLAGS) $< -o $@
+
+font.o: ../../utils/font.c ../../drivers/avr/system.h ../../utils/font.h
+	$(CC) -c $(CFLAGS) $< -o $@
+
+pacer.o: ../../utils/pacer.c ../../drivers/avr/system.h ../../drivers/avr/timer.h ../../utils/pacer.h
+	$(CC) -c $(CFLAGS) $< -o $@
+
+tinygl.o: ../../utils/tinygl.c ../../drivers/avr/system.h ../../drivers/display.h ../../utils/font.h ../../utils/tinygl.h
+	$(CC) -c $(CFLAGS) $< -o $@
+
+
+
+# Link: create ELF output file from object files.
+hello5.out: hello5.o pio.o system.o timer.o display.o ledmat.o navswitch.o font.o pacer.o tinygl.o
+	$(CC) $(CFLAGS) $^ -o $@ -lm
+	$(SIZE) $@
+
+
+# Target: clean project.
+.PHONY: clean
+clean: 
+	-$(DEL) *.o *.out *.hex
+
+
+# Target: program project.
+.PHONY: program
+program: hello5.out
+	$(OBJCOPY) -O ihex hello5.out hello5.hex
+	dfu-programmer atmega32u2 erase; dfu-programmer atmega32u2 flash hello5.hex; dfu-programmer atmega32u2 start
+
+
diff --git a/apps/hello5/Makefile.test b/apps/hello5/Makefile.test
new file mode 100644
index 0000000..1c4dd15
--- /dev/null
+++ b/apps/hello5/Makefile.test
@@ -0,0 +1,64 @@
+# File:   Makefile
+# Author: M. P. Hayes, UCECE
+# Date:   11 Sep 2010
+# Descr:  Makefile for hello5
+
+CC = gcc
+CFLAGS = -Wall -Wstrict-prototypes -Wextra -g -I../../drivers/test -I../../drivers -I../../fonts -I../../utils
+
+DEL = rm
+
+
+# Default target.
+all: hello5
+
+
+# Compile: create object files from C source files.
+hello5-test.o: hello5.c ../../drivers/display.h ../../drivers/navswitch.h ../../drivers/test/system.h ../../fonts/font5x7_1.h ../../utils/font.h ../../utils/pacer.h ../../utils/tinygl.h
+	$(CC) -c $(CFLAGS) $< -o $@
+
+display-test.o: ../../drivers/display.c ../../drivers/display.h ../../drivers/ledmat.h ../../drivers/test/system.h
+	$(CC) -c $(CFLAGS) $< -o $@
+
+ledmat-test.o: ../../drivers/ledmat.c ../../drivers/ledmat.h ../../drivers/test/avrtest.h ../../drivers/test/pio.h ../../drivers/test/system.h
+	$(CC) -c $(CFLAGS) $< -o $@
+
+navswitch-test.o: ../../drivers/navswitch.c ../../drivers/navswitch.h ../../drivers/test/avrtest.h ../../drivers/test/delay.h ../../drivers/test/pio.h ../../drivers/test/system.h
+	$(CC) -c $(CFLAGS) $< -o $@
+
+mgetkey-test.o: ../../drivers/test/mgetkey.c ../../drivers/test/mgetkey.h
+	$(CC) -c $(CFLAGS) $< -o $@
+
+pio-test.o: ../../drivers/test/pio.c ../../drivers/test/avrtest.h ../../drivers/test/pio.h ../../drivers/test/system.h
+	$(CC) -c $(CFLAGS) $< -o $@
+
+system-test.o: ../../drivers/test/system.c ../../drivers/test/avrtest.h ../../drivers/test/mgetkey.h ../../drivers/test/pio.h ../../drivers/test/system.h
+	$(CC) -c $(CFLAGS) $< -o $@
+
+timer-test.o: ../../drivers/test/timer.c ../../drivers/test/system.h ../../drivers/test/timer.h
+	$(CC) -c $(CFLAGS) $< -o $@
+
+font-test.o: ../../utils/font.c ../../drivers/test/system.h ../../utils/font.h
+	$(CC) -c $(CFLAGS) $< -o $@
+
+pacer-test.o: ../../utils/pacer.c ../../drivers/test/system.h ../../drivers/test/timer.h ../../utils/pacer.h
+	$(CC) -c $(CFLAGS) $< -o $@
+
+tinygl-test.o: ../../utils/tinygl.c ../../drivers/display.h ../../drivers/test/system.h ../../utils/font.h ../../utils/tinygl.h
+	$(CC) -c $(CFLAGS) $< -o $@
+
+
+
+
+# Link: create executable file from object files.
+hello5: hello5-test.o display-test.o ledmat-test.o navswitch-test.o mgetkey-test.o pio-test.o system-test.o timer-test.o font-test.o pacer-test.o tinygl-test.o
+	$(CC) $(CFLAGS) $^ -o $@ -lrt
+
+
+# Clean: delete derived files.
+.PHONY: clean
+clean: 
+	-$(DEL) hello5 hello5-test.o display-test.o ledmat-test.o navswitch-test.o mgetkey-test.o pio-test.o system-test.o timer-test.o font-test.o pacer-test.o tinygl-test.o
+
+
+
diff --git a/apps/hello5/doc/Makefile b/apps/hello5/doc/Makefile
new file mode 100644
index 0000000..12f7d00
--- /dev/null
+++ b/apps/hello5/doc/Makefile
@@ -0,0 +1,42 @@
+# File:   Makefile
+# Author: M. P. Hayes, UCECE
+# Date:   11 Sep 2010
+# Descr:  Makefile for hello5 docs
+
+DEL = rm
+
+all: file_dependencies.pdf module_dependencies.pdf makefile_dependencies.pdf build_dependencies.pdf callgraph.pdf
+
+file_dependencies.pdf: files.d 
+	../../../etc/graphdeps.py $< --out $@
+
+module_dependencies.pdf: modules.d 
+	../../../etc/graphdeps.py $< --modules --out $@
+
+makefile_dependencies.pdf: ../Makefile
+	../../../etc/graphdeps.py $< --out $@
+
+build_dependencies.pdf: ../Makefile
+	../../../etc/graphdeps.py $< --out $@ --showops
+
+callgraph.pdf: callgraph.d
+	../../../etc/graphdeps.py --calls --modules $< --out $@ --showops
+
+
+files.d: ../Makefile
+	(cd ..;	../../etc/makemake.py --relpath --files . . ../../drivers ../../drivers/avr ../../utils ../../extra --exclude system.h > doc/files.d)
+
+
+modules.d: ../Makefile
+	(cd ..;	../../etc/makemake.py --relpath --modules . . ../../drivers ../../drivers/avr ../../utils ../../extra --exclude system > doc/modules.d)
+
+
+callgraph.d: ../Makefile
+	(cd ..;	../../etc/makemake.py --cc="avr-gcc" --cflags="-Os -mmcu=atmega32u2" --relpath --calls . . ../../drivers ../../drivers/avr ../../utils ../../extra --exclude system.h > doc/callgraph.d)
+
+
+# Clean: delete derived files.
+.PHONY: clean
+clean: 
+	-$(DEL) *.d *.pdf
+
diff --git a/apps/hello5/doc/README b/apps/hello5/doc/README
new file mode 100644
index 0000000..39a9712
--- /dev/null
+++ b/apps/hello5/doc/README
@@ -0,0 +1,16 @@
+Running make in this directory will generate a number of PDF graphs.
+In the callgraph, the arrows means "calls".  In the dependency graphs,
+the arrows means "requires" (or "depends upon").
+
+callgraph.pdf             This shows the callgraph, i.e., what functions each
+                          function in the program calls.
+module_dependencies.pdf   This shows the dependencies between the modules.
+file_dependencies.pdf     This shows the dependencies between the files.
+makefile_dependencies.pdf This shows the dependencies required by make when
+                          building the program.
+build_dependencies.pdf    This is like makefile_dependencies.pdf but shows
+                          the operations performed to generate the new file.
+
+callgraph.d               This shows the callgraph in text format.
+files.d                   This shows the file dependencies in text format.
+modules.d                 This shows the module dependencies in text format.
diff --git a/apps/hello5/doc/callgraph.d b/apps/hello5/doc/callgraph.d
new file mode 100644
index 0000000..829855f
--- /dev/null
+++ b/apps/hello5/doc/callgraph.d
@@ -0,0 +1,78 @@
+system_clock_init@system.c: 
+
+system_watchdog_timer_init@system.c: 
+
+system_init@system.c: system_clock_init system_watchdog_timer_init
+
+pio_config_set@pio.c: 
+
+ledmat_init@ledmat.c: pio_config_set pio_config_set
+
+display_clear@display.c: 
+
+display_init@display.c: ledmat_init display_clear
+
+tinygl_text_speed_set@tinygl.c: 
+
+tinygl_clear@tinygl.c: display_clear
+
+tinygl_init@tinygl.c: display_init tinygl_text_speed_set tinygl_clear
+
+navswitch_init@navswitch.c: 
+
+tinygl_font_set@tinygl.c: 
+
+tinygl_text_mode_set@tinygl.c: 
+
+tinygl_text_dir_set@tinygl.c: 
+
+tinygl_point@tinygl.c: 
+
+tinygl_text@tinygl.c: strncpy
+
+timer_init@timer.c: 
+
+pacer_init@pacer.c: timer_init
+
+timer_get@timer.c: 
+
+timer_wait_until@timer.c: timer_get
+
+pacer_wait@pacer.c: timer_wait_until
+
+font_pixel_get@font.c: 
+
+tinygl_font_pixel_get@tinygl.c: font_pixel_get
+
+display_pixel_set@display.c: 
+
+tinygl_draw_point@tinygl.c: display_pixel_set
+
+tinygl_draw_char@tinygl.c: tinygl_point tinygl_font_pixel_get tinygl_draw_point tinygl_point tinygl_draw_point tinygl_point tinygl_font_pixel_get tinygl_draw_point tinygl_point tinygl_draw_point
+
+tinygl_draw_string@tinygl.c: tinygl_draw_char
+
+tinygl_text_advance@tinygl.c: tinygl_draw_char tinygl_draw_string
+
+pio_output_high@pio.c: 
+
+pio_output_low@pio.c: 
+
+ledmat_display_column@ledmat.c: pio_output_high pio_output_low pio_output_high pio_output_low
+
+display_update@display.c: ledmat_display_column
+
+tinygl_update@tinygl.c: tinygl_text_advance display_update
+
+pio_config_get@pio.c: 
+
+_delay_loop_1@navswitch.c: 
+
+pio_input_get@pio.c: 
+
+navswitch_update@navswitch.c: pio_config_get pio_config_set pio_config_set _delay_loop_1 pio_input_get pio_config_set
+
+navswitch_push_event_p@navswitch.c: 
+
+main@hello5.c: system_init tinygl_init navswitch_init tinygl_font_set tinygl_text_speed_set tinygl_text_mode_set tinygl_text_dir_set tinygl_point tinygl_text pacer_init pacer_wait tinygl_update navswitch_update navswitch_push_event_p tinygl_text_mode_set navswitch_push_event_p tinygl_text_mode_set
+
diff --git a/apps/hello5/doc/files.d b/apps/hello5/doc/files.d
new file mode 100644
index 0000000..aa6984d
--- /dev/null
+++ b/apps/hello5/doc/files.d
@@ -0,0 +1,62 @@
+../../drivers/avr/timer.h: 
+
+../../drivers/avr/timer.c: ../../drivers/avr/timer.h
+
+../../drivers/avr/timer.o: ../../drivers/avr/timer.c
+
+../../drivers/navswitch.h: 
+
+../../drivers/display.h: 
+
+../../utils/font.h: 
+
+../../utils/tinygl.h: ../../drivers/display.h ../../utils/font.h
+
+../../utils/pacer.h: 
+
+../../fonts/font3x5_1.h: ../../utils/font.h
+
+hello5.c: ../../drivers/navswitch.h ../../utils/tinygl.h ../../utils/pacer.h ../../fonts/font3x5_1.h
+
+hello5.o: hello5.c
+
+../../drivers/avr/delay.h: 
+
+../../drivers/avr/pio.h: 
+
+../../drivers/navswitch.c: ../../drivers/navswitch.h ../../drivers/avr/delay.h ../../drivers/avr/pio.h
+
+../../drivers/navswitch.o: ../../drivers/navswitch.c
+
+../../drivers/ledmat.h: 
+
+../../drivers/ledmat.c: ../../drivers/avr/pio.h ../../drivers/ledmat.h
+
+../../drivers/ledmat.o: ../../drivers/ledmat.c
+
+../../utils/font.c: ../../utils/font.h
+
+../../utils/font.o: ../../utils/font.c
+
+../../drivers/avr/pio.c: ../../drivers/avr/pio.h
+
+../../drivers/avr/pio.o: ../../drivers/avr/pio.c
+
+../../utils/pacer.c: ../../drivers/avr/timer.h ../../utils/pacer.h
+
+../../utils/pacer.o: ../../utils/pacer.c
+
+../../drivers/display.c: ../../drivers/ledmat.h ../../drivers/display.h
+
+../../drivers/display.o: ../../drivers/display.c
+
+../../utils/tinygl.c: ../../utils/tinygl.h ../../drivers/display.h ../../utils/font.h
+
+../../utils/tinygl.o: ../../utils/tinygl.c
+
+../../drivers/avr/system.c: 
+
+../../drivers/avr/system.o: ../../drivers/avr/system.c
+
+hello5.out: ../../drivers/avr/timer.o hello5.o ../../drivers/navswitch.o ../../drivers/ledmat.o ../../utils/font.o ../../drivers/avr/pio.o ../../utils/pacer.o ../../drivers/display.o ../../utils/tinygl.o ../../drivers/avr/system.o
+
diff --git a/apps/hello5/doc/modules.d b/apps/hello5/doc/modules.d
new file mode 100644
index 0000000..5f75676
--- /dev/null
+++ b/apps/hello5/doc/modules.d
@@ -0,0 +1,18 @@
+pio: 
+
+navswitch: pio
+
+ledmat: pio
+
+display: ledmat
+
+font: 
+
+tinygl: display font
+
+timer: 
+
+pacer: timer
+
+hello5: navswitch tinygl pacer
+
diff --git a/apps/hello5/hello5.c b/apps/hello5/hello5.c
new file mode 100644
index 0000000..2f7c615
--- /dev/null
+++ b/apps/hello5/hello5.c
@@ -0,0 +1,58 @@
+/** @file   hello5.c
+    @author M. P. Hayes, UCECE
+    @date   24 August 2009
+    @brief  Simple message display program using display module.
+
+    @defgroup hello5 Simple message display program using tinygl
+*/
+
+#include "system.h"
+#include "navswitch.h"
+#include "tinygl.h"
+#include "pacer.h"
+#include "../fonts/font3x5_1.h"
+
+
+/* Define polling rate in Hz.  */
+#define LOOP_RATE 300
+
+/* Define text update rate (characters per 10 s).  */
+#define MESSAGE_RATE 10
+
+
+int main (void)
+{
+    system_init ();
+    tinygl_init (LOOP_RATE);
+
+    navswitch_init ();
+
+    tinygl_font_set (&font3x5_1);
+    tinygl_text_speed_set (MESSAGE_RATE);
+    tinygl_text_mode_set (TINYGL_TEXT_MODE_SCROLL);
+    tinygl_text_dir_set (TINYGL_TEXT_DIR_ROTATE);
+
+    tinygl_text ("HELLO WORLD", tinygl_point (0, TINYGL_HEIGHT - 1));
+
+    pacer_init (LOOP_RATE);
+
+    /* Paced loop.  */
+    while (1)
+    {
+        /* Wait for next tick.  */
+        pacer_wait ();
+
+        tinygl_update ();
+
+        navswitch_update ();
+
+        if (navswitch_push_event_p (NAVSWITCH_WEST))
+            tinygl_text_mode_set (TINYGL_TEXT_MODE_STEP);
+
+        if (navswitch_push_event_p (NAVSWITCH_EAST))
+            tinygl_text_mode_set (TINYGL_TEXT_MODE_SCROLL);
+
+    }
+
+    return 0;
+}