If the notation is unknown to you, it's UML
One thing worth noting is that the first diagram puts several levels of representation in the same drawing. It's quite confused, but it shows in one shot what I have in mind yet.
DSP Drivers will include a serial interface to drive the DSP behaviour, an input to monitor PTT, and possibly, an input to get the S-Meter level.
The Controller package will be further divided into several components. One of them will track user settings, and will depend on FlashDriver too.
Explanations about responsibilities of each package are still to come.
Then follows a very first attempt at describing the VFO section. Incomplete as it is, it's probably of use only to me, and will change as soon as I define the collaborations of these components.