Add lab files

labs/lab2-ex3/Makefile

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+# File:   Makefile
+# Author: M. P. Hayes, UCECE
+# Date:   12 Sep 2010
+# Descr:  Makefile for lab2-ex3
+
+# Definitions.
+CC = avr-gcc
+CFLAGS = -mmcu=atmega32u2 -Os -Wall -Wstrict-prototypes -Wextra -g -I. -I../../drivers/avr -I../../drivers
+OBJCOPY = avr-objcopy
+SIZE = avr-size
+DEL = rm
+
+
+# Default target.
+all: lab2-ex3.out
+
+
+# Compile: create object files from C source files.
+lab2-ex3.o: lab2-ex3.c ../../drivers/avr/system.h ../../drivers/led.h pacer.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 $@
+
+led.o: ../../drivers/led.c ../../drivers/avr/pio.h ../../drivers/avr/system.h ../../drivers/led.h
+	$(CC) -c $(CFLAGS) $< -o $@
+
+pacer.o: pacer.c ../../drivers/avr/system.h pacer.h
+	$(CC) -c $(CFLAGS) $< -o $@
+
+
+
+# Link: create ELF output file from object files.
+lab2-ex3.out: lab2-ex3.o pio.o system.o led.o pacer.o
+	$(CC) $(CFLAGS) $^ -o $@ -lm
+	$(SIZE) $@
+
+
+# Target: clean project.
+.PHONY: clean
+clean: 
+	-$(DEL) *.o *.out *.hex
+
+
+# Target: program project.
+.PHONY: program
+program: lab2-ex3.out
+	$(OBJCOPY) -O ihex lab2-ex3.out lab2-ex3.hex
+	dfu-programmer atmega32u2 erase; dfu-programmer atmega32u2 flash lab2-ex3.hex; dfu-programmer atmega32u2 start
+
+

labs/lab2-ex3/doc/Makefile

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+# File:   Makefile
+# Author: M. P. Hayes, UCECE
+# Date:   11 Sep 2010
+# Descr:  Makefile for ex3 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
+

labs/lab2-ex3/doc/README

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+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.

labs/lab2-ex3/lab2-ex3.c

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+#include "system.h"
+#include "led.h"
+#include "pacer.h"
+
+
+int main (void)
+{
+    uint8_t state = 0;
+
+    system_init ();
+    led_init ();
+    
+    /* Set up pacer with a frequency of 2 Hz.  */
+    pacer_init (2);
+    
+    while (1)
+    {
+        /* Pace the loop.  */
+        pacer_wait ();
+        
+        /* Toggle LED. */
+        led_set  (LED1, state);
+        state = !state;
+    }
+}

labs/lab2-ex3/pacer.c

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+#include <avr/io.h>
+#include "pacer.h"
+
+static uint16_t pacer_period;
+
+/* Initialise the pacer module.  */
+void pacer_init (uint16_t pacer_frequency)
+{
+    /* TODO: initialise timer/counter peripheral the
+       same way as in lab2/lab2-ex2/timer.c but also calculate 
+       the timer/counter value from the pacer frequency */
+}
+
+
+/* Pace a while loop.  */
+void pacer_wait (void)
+{
+
+    /* TODO: Implement the same way as the timer_delay () function 
+       lab2-except reset TCNT1 after the while loop. */
+
+}

labs/lab2-ex3/pacer.h

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+#ifndef PACER_H
+#define PACER_H
+
+#include "system.h"
+
+/* Initialise the pacer module.  */
+void pacer_init (uint16_t pacer_frequency);
+
+
+/* Pace a while loop.  */
+void pacer_wait (void);
+
+#endif //PACER_H