Add lib folder

makefile

@@ -7,13 +7,14 @@ OBJCOPY=avr-objcopy
 CFLAGS=-Wall -g -O -mmcu=${MCU} -DF_CPU=${F_CPU} -I. -std=gnu++11 
 
 SRC=$(wildcard src/*.cpp)
+LIB=$(wildcard lib/*/src/*.cpp)
 
 default: clean build flash
 
 build:
 	mkdir -p bin
-	${CC} ${CFLAGS} -o bin/main.bin  ${SRC}  -w
-	${CC} ${CFLAGS} -o bin/main.elf ${SRC} -w
+	${CC} ${CFLAGS} -o bin/main.bin  ${SRC} ${LIB} -w
+	${CC} ${CFLAGS} -o bin/main.elf ${SRC} ${LIB} -w
 	${OBJCOPY} -j .text -j .data -O ihex bin/main.bin bin/main.hex
 
 flash: