PaoloP:
Se non ricordo male, o Leo o Lesto ci hanno sbattuto la testa più volte e poi hanno abbandonato il progetto.
A questo punto meglio una Leonardo minimale che contiene già la gestione della USB. Purtroppo il chip è solo SMD.
Vabbè ci sono gli adattatori per gli smd , smd to dip.
Release 2009-08-22
Fixed a bug in the 12.8 MHz module: End Of Packet detection was made in the center between bit 0 and 1 of each byte. This is where the data lines are expected to change and the sampled data may therefore be unstable. We therefore check EOP only if bits 0 and 1 have both been read as 0 on D-.
Fixed a bit-stuffing problem in the 16 MHz module: If bit 6 was stuffed, the unstuffing code in the receiver routine was ca. 1 cycle too long. If multiple bytes had the unstuffing in bit 6, the error summed up until the receiver was out of sync.
Updated bits in Configuration Descriptor’s bmAttributes according to USB 1.1 (in particular bit 7, it is a must-be-set bit now).
Included option for faster CRC routine (thanks to S?awomir Fra? for the code).
Improved documentation about USB-IDs.
a quanto pare i bug per il 16mhz sono stati risolti dal 2009 almeno cosi vedo dal sito "ufficioso"