Add Makefile and do general cleanup

.gitignore

@@ -0,0 +1,4 @@
+*.o
+*.elf
+*.hex
+*.bin

Makefile

@@ -0,0 +1,26 @@
+CC = avr-gcc
+CFLAGS = -Wall -Os -mmcu=atmega328p
+OBJCOPY = avr-objcopy
+
+OBJ = main.o os.o os_asm.o
+
+
+all: image.hex image.bin
+
+%.o: %.c
+	$(CC) $(CFLAGS) -c $<
+
+os_asm.o: os_asm.S
+	$(CC) $(CFLAGS) -c $<
+
+image.elf: $(OBJ)
+	$(CC) $(CFLAGS) -o image.elf $(OBJ)
+
+image.hex: image.elf
+	$(OBJCOPY) image.elf -O ihex image.hex
+
+image.bin: image.elf
+	$(OBJCOPY) image.elf -O binary image.bin
+
+clean:
+	rm -f *.o *.elf *.hex

os.c

@@ -120,7 +120,6 @@ void* os_current_task_get_data(void) {
 }
 
 void os_current_task_kill(void) {
-
     ATOMIC_BLOCK(ATOMIC_RESTORESTATE) {
         tasks[task_current_idx].valid = 0;
     }