Redesign of ASAP2 file for CAN interface. Now, we have a structure of nested groups. All Rx and all Tx signals are offered in two large groups. A tree of groups offers the signals in hierarchical view: The buses are presented as root level groups, separately for Rx and Tx. A bus related groups contains a message sub-group for each message transmitted on that bus. A message sub-group contains the transmission status and another sub-group, which bundles all signals of the message