added driver for one inverting charge pump

Makefile

@@ -1,7 +1,7 @@
 CC=avr-gcc
 CFLAG= -g -mmcu=atmega168 -O
 
-objects= time.o usart.o main.o ringbuffer.o configuration.o analogin.o
+objects= time.o usart.o main.o ringbuffer.o configuration.o analogin.o analogout.o
 
 all:main.elf