Hi all,
is there a way to access the phase accumulator in Xilinx DDS 5.0?
(preferably from VHDL)
I'd like to determine the carrier phase between two modulated signals
by phaselocking an NCO on each one and then subtracting the phase accus.
Given that there is a great DDS already, I dislike reinventing it
just to tap an internal signal.
BTW the register interface is nice if I want to setup everything with a
microcontroller. But --- in a pure hardware environment it is clumsy to
multiplex frequency word and phase modulation to a 32 bit data bus
- address line + WE, knowing the first thing to happen is that they will be
demultiplexed again into different registers. In addition the update rates
are halved and potentially simultaneous frequency/phase updates need to
be scheduled.
(Options for DDS 5.1???)
best regards, Gerhard