Sync_gen - david-macmahon/wiki_convert_test GitHub Wiki
Block: Sync Pulse Generator (sync_gen)
Block Author: Mark Wagner, Suraj Gowda
Document Author: Suraj Gowda, Billy Mallard
Summary
Generates a sync pulse of an appropriate period for a design.
Mask Parameters
| Parameter | Variable | Description |
|---|---|---|
| Simulation Accumulation Length | gen_acc_len | The accumulation length that will be used for generation. |
| FFT Size | fft_size | The size of the FFT. |
| Simultaneous Inputs (FFT) | fft_simult_inputs | The number of data inputs into the FFT. |
| Taps in pfb_fir | pfb_fir_taps | The number of PFB filter taps. If your design does not use a pfb_fir, set this to 1. |
| Reorder Orders | reorder_vec | A vector of the orders of the reorder blocks inside the FFT. In your model, the reorder blocks are in fft/fft_biplex/biplex_cplx_unscrambler. The orders should be displayed under the blocks. |
| Scale | scale | The amount to scale the sync period by. |
Ports
| Port | Dir | Data Type | Description |
|---|---|---|---|
| sync_out | out | Boolean | The generated sync pulse. |
Description
The sync_gen block computes the sync pulse period
as:
(SyncPeriod = (acc_num)*(pfb_fir_taps)LCM(reorder_vec)(\frac{fft_size}{fft_simult_inputs}))
This formula is derived in Memo #25.