[Discuss-gnuradio] Hierarchial block as an input source

[Duane Ellis]

Hi - 

I’m want to to create some standardized “parts” that I can simply reuse.

Some examples (I am only looking at the receiver, no transmitting *yet*)

The SDR_DONGLE  Has 3 interfaces or “ports"
        INPUT:  Desired Center Frequency in HZ
        OUTPUT:  The I/Q Data stream
        OUTPUT: A constant - the sample rate

Perhaps an INPUT selector GUI of some type
        This would let me select my signal source.
        Radio Buttons, or a Drop Down Combo-Box
        Selections might be: USRP, or a USB-RTL, or a BladeRF, or a File

I don’t see a way to do this

I’m trying to find a way to create a *COMMON* - decoder that will work with a 
number of front ends
It seems I have to do “surgery” on my flow graph every time… Yuck.

Can somebody point me to some examples?

-Duane