Everything here is written in assembler with AVR Studio. It is formatted for a tabulator setting of 18 characters.
The software is still incomplete but it contains some 64 bit floating point routines which may be interesting for other AVR projects.
For the PCB layout I used the freeware license of the 'Eagle' software. It allows the
(non commercial) production of PCBs up to 100x80 mm in size with two signal layers.
