Add example showing pseudorandom sequence

main
Michael Hayes 12 years ago
parent 9d73b2e79d
commit 4839a0c46b

@ -0,0 +1,74 @@
# File: Makefile
# Author: M. P. Hayes, UCECE
# Date: 12 Sep 2010
# Descr: Makefile for random1
# Definitions.
CC = avr-gcc
CFLAGS = -mmcu=atmega32u2 -Os -Wall -Wstrict-prototypes -Wextra -g -I../../drivers/avr -I../../drivers -I../../utils
OBJCOPY = avr-objcopy
SIZE = avr-size
DEL = rm
# Default target.
all: random1.out
# Compile: create object files from C source files.
random1.o: random1.c ../../drivers/avr/system.h ../../drivers/display.h ../../drivers/navswitch.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 output file (executable) from object files.
random1.out: random1.o pio.o system.o timer.o display.o ledmat.o navswitch.o font.o pacer.o tinygl.o
$(CC) $(CFLAGS) $^ -o $@ -lm
$(SIZE) $@
# Create hex file for programming from executable file.
random1.hex: random1.out
$(OBJCOPY) -O ihex random1.out random1.hex
# Target: clean project.
.PHONY: clean
clean:
-$(DEL) *.o *.out *.hex
# Target: program project.
.PHONY: program
program: random1.hex
dfu-programmer atmega32u2 erase; dfu-programmer atmega32u2 flash random1.hex; dfu-programmer atmega32u2 start

@ -0,0 +1,64 @@
# File: Makefile
# Author: M. P. Hayes, UCECE
# Date: 11 Sep 2010
# Descr: Makefile for random1
CC = gcc
CFLAGS = -Wall -Wstrict-prototypes -Wextra -g -I../../drivers/test -I../../drivers -I../../utils
DEL = rm
# Default target.
all: random1
# Compile: create object files from C source files.
random1-test.o: random1.c ../../drivers/display.h ../../drivers/navswitch.h ../../drivers/test/system.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.
random1: random1-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) random1 random1-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

@ -0,0 +1,45 @@
# File: Makefile
# Author: M. P. Hayes, UCECE
# Date: 11 Sep 2010
# Descr: Makefile for led5 docs
# The scripts used to make the graphs require the program dot; this
# is part of the graphviz package.
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 --rotate --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

@ -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.

@ -0,0 +1,59 @@
/** @file random1.c
@author M.P. Hayes
@date 25 Sep 2013
@brief Example to show how pseudorandom numbers follow the same
sequence.
*/
#include <stdlib.h>
#include "system.h"
#include "pacer.h"
#include "tinygl.h"
#include "navswitch.h"
#include "../fonts/font5x7_1.h"
#define LOOP_RATE 10000
#define NAVSWITCH_RATE 20
int main (void)
{
uint16_t navswitch_tick = 0;
system_init ();
navswitch_init ();
tinygl_init (LOOP_RATE);
tinygl_font_set (&font5x7_1);
pacer_init (LOOP_RATE);
tinygl_draw_char ('*', tinygl_point (0, 0));
while (1)
{
pacer_wait ();
tinygl_update ();
navswitch_tick++;
if (navswitch_tick >= LOOP_RATE / NAVSWITCH_RATE)
{
navswitch_tick = 0;
navswitch_update ();
if (navswitch_push_event_p (NAVSWITCH_PUSH))
{
char c;
c = (rand () % 26) + 'A';
tinygl_draw_char (c, tinygl_point (0, 0));
}
}
}
return 0;
}

@ -1,6 +1,9 @@
/** @file stars1.c
@author M.P. Hayes
@date 25 Sep 2013
@brief Example of using pseudorandom numbers and controlling pixel
brightness with PWM. Note, pseudorandom numbers follow the same
sequence.
*/
#include <stdlib.h>
@ -12,7 +15,8 @@
but requires a faster update rate. */
#define LUMINANCE_STEPS 25
/* This needs to be fast enough to prevent the eye noticing flicker. */
/* This needs to be fast enough to prevent the eye noticing flicker.
A lower value (say 5) is useful for flashing pixels. */
#define PWM_RATE 40
/* This is the rate (Hz) that new stars are created. */
@ -56,7 +60,6 @@ int main (void)
tinygl_update ();
}
fade_tick++;
if (fade_tick >= UPDATE_RATE / FADE_RATE)
{

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