x32_DDS - dspsandbox/Canvas GitHub Wiki
images/DSP-modules/x32_DDS.png
Description
DIRECT DIGITAL SYNTHESIZER (DDS). Sine and Cosine generation with amplitude resolution of 16 bits, adjustable phase offset, phase increment and resync. The core accommodates the generated waves to the 16 most significant bits (MSB) of the output ports, which corresponds to a sine and cosine wave of amplitude=1V.
The phase (p) of the cosine and sine waves reads:
p=2*PI*(pOff+pInc*i)/2^32.............IF resync==0,
p=2*PI*(pOff)/2^32............................IF resync==1,
where i is the number of clk cycles since the resync port is 0.
See Xilinx DDS Compiler for further information on the backend.
Ports
| Name | Direction | Width | Comment |
|---|---|---|---|
| pInc | Rx | 32 bit | Phase increment |
| pOff | Rx | 32 bit | Phase offset |
| resync | Rx | 1 bit | RUNNING_PHASE IF resync==0 RESET_PHASE IF resync==1 |
| cos | Tx | 32 bit | cos(p) |
| sin | Tx | 32 bit | sin(p) |