Define the graph classes using objects defined in the appropriate name space. It must include the ADF library and Vitis DSP Library for FFIT. A general specification is put in for the ADF namespace:
// FFTrows_graph FFT point size...
#define FFT_ROW_TP_POINT_SIZE MAT_COLS
// FFTcols_graph FFT point size...
#define FFT_COL_TP_POINT_SIZE MAT_ROWS
// 1 (FFT) or 0 (IFFT)...
#define FFT_2D_TP_FFT_NIFFT 1
// 0 Bit Shift before output, change based on input...
#define FFT_2D_TP_SHIFT 0
// FFT divided over 1 FFT Kernel...
#define FFT_2D_TP_CASC_LEN 1
// Dynamic FFT Point Size is disabled...
#define FFT_2D_TP_DYN_PT_SIZE 0
// TP_WINDOW_VSIZE for FFTrows_graph...
#define FFT_ROW_TP_WINDOW_VSIZE MAT_COLS
// TP_WINDOW_VSIZE for FFTcols_graph
// Increasing the "TP__WINDOW _VSIZE" so that the ping-pong overhead is less
// Assigning it as MAT_COLS instead of MAT_ROWS...
#define FFT_COL_TP_WINDOW_VSIZE MAT_COLS
////////////////////////////////////////////////////////
// FFT_2D Datatype related Macros
// Datatype can be:
// cint16 (Default) or cfloat...
// 0=cint16(Default)
// 1=cfloat
#if FFT_2D_DT == 0
// Input data type...
#define FFT_2D_TT_DATA cint16
// Twiddle Factor data type...
#define FFT_2D_TT_TWIDDLE cint16
// FFTrows_graph I/O WINDOW BUFF SIZE IN BYTES...
#define FFT_ROW_WINDOW_BUFF_SIZE (FFT_ROW_TP_WINDOW_VSIZE * 4)
// FFTcols_graph I/O WINDOW BUFF SIZE IN BYTES...
#define FFT_COL_WINDOW_BUFF_SIZE (FFT_COL_TP_WINDOW_VSIZE * 4)
#elif FFT_2D_DT == 1
// Input data type...
#define FFT_2D_TT_DATA cfloat
// Twiddle Factor data type...
#define FFT_2D_TT_TWIDDLE cfloat
// FFTrows_graph I/O WINDOW BUFF SIZE IN BYTES...
#define FFT_ROW_WINDOW_BUFF_SIZE (FFT_ROW_TP_WINDOW_VSIZE * 8)
// FFTcols_graph I/O WINDOW BUFF SIZE IN BYTES...
#define FFT_COL_WINDOW_BUFF_SIZE (FFT_COL_TP_WINDOW_VSIZE * 8)
#endif
#include "adf.h"
#include "fft_ifft_dit_1ch_graph.hpp"
using namespace adf;
namespace dsplib = xf::dsp::aie;
All user graphs are defined from the class graph: for example, in the FFTrows_graph design:
class FFTrows_graph: public graph
{
public:
port<input> in;
port<output> out;
// Constructor - with Rowise FFT graph class initialization...
FFTrows_graph()
{
dsplib::fft::dit_1ch::fft_ifft_dit_1ch_graph<FFT_2D_TT_DATA, FFT_2D_TT_TWIDDLE, FFT_ROW_TP_POINT_SIZE,
FFT_2D_TP_FFT_NIFFT, FFT_2D_TP_SHIFT, FFT_2D_TP_CASC_LEN, FFT_2D_TP_DYN_PT_SIZE, FFT_ROW_TP_WINDOW_VSIZE> FFTrow_gr;
runtime<ratio>(*FFTrow_gr.getKernels()) = 0.6;
connect< window<FFT_ROW_WINDOW_BUFF_SIZE> > (in, FFTrow_gr.in[0]);
connect< window<FFT_ROW_WINDOW_BUFF_SIZE> > (FFTrow_gr.out[0], out);
}
};