2 - fix handling of timeout (program timer of RC632)
5 - fix handling of TX or RX > 0x7f [buffer length in atmel chip?]
11 - implement 'option 2' frame markers
12 - test anticollission (need multiple tags)
15 - implement anticollision
16 - implement all the rest
19 - figure out why authentication doensn't work, even though it is exactly like in other drivers
22 - implement pps for asymmetric (rx/tx) speeds
26 - add ifdhandler driver
29 - implementation of code for various passive tags