split GPIO stuff into separate file

1 files changed, 5 insertions, 1 deletions

diff --git a/Makefile b/Makefile
index dbecf8c..2839e99 100644
--- a/Makefile
+++ b/Makefile
@@ -1,7 +1,11 @@
 CC=arm-linux-gnueabihf-gcc
 CFLAGS=-Wall -Wextra
 
-freeonebook: freeonebook.o
+freeonebook: freeonebook.o gpio.o
+
+freeonebook.o: freeonebook.c gpio.h
+
+gpio.o: gpio.c gpio.h
 
 clean:
 	rm -f freeonebook *.o