2 - fix handling of timeout (program timer of RC632)
5 - fix handling of TX or RX > 0x7f [buffer length in atmel chip?]
8 - test anticollision, resolve remaining bugs
11 - implement 'option 2' frame markers
12 - test anticollission (need multiple tags)
16 - implement + test pps
19 - add ifdhandler driver
22 - implementation of various tags