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@@ -1,73 +0,0 @@ |
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LIBRARY ieee;
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USE ieee.std_logic_1164.ALL;
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USE work.POLY_FIR_PKG.ALL;
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ENTITY poly_fir_blk IS
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PORT (
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i_clk : IN std_logic;
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i_coeffs : IN vect_polyfir_coeffs_in;
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i_data : IN vect_adc_data_out;
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o_data : OUT matrix_fir_data_out);
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END ENTITY poly_fir_blk;
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ARCHITECTURE polyphase OF poly_fir_blk IS
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SIGNAL matrix3D_reg_out_simple_rif_in : matrix3D_reg_data_out := (OTHERS => (OTHERS => (OTHERS => (OTHERS => '0'))));
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SIGNAL matrix_coeffs : matrix_fir_coeffs_in := (OTHERS => (OTHERS => (OTHERS => '0')));
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SIGNAL matrix_fir_out : matrix_fir_data_out := (OTHERS => (OTHERS => (OTHERS => '0')));
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BEGIN -- ARCHITECTURE polyphase
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--purpose: fill the polyphase coefficients into a 2D matrix from the filter vector (1D)
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fill_coeff : PROCESS(i_coeffs) -- rearrange coeffs into a matrix
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VARIABLE coeff_nb : natural;
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VARIABLE sf_coeff : natural;
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VARIABLE subfilter_nb : natural;
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BEGIN
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coeff_nb := 0;
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sf_coeff := 0;
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subfilter_nb := 0;
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coeff_for_matrix : FOR coeff_nb IN 0 TO cst_nb_coeffs_filter_in-1 LOOP
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matrix_coeffs(subfilter_nb)(sf_coeff) <= i_coeffs(coeff_nb);
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subfilter_nb := subfilter_nb+1;
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IF (subfilter_nb = cst_nb_subfilters) THEN
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sf_coeff := sf_coeff+1;
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subfilter_nb := 0;
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END IF;
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END LOOP coeff_for_matrix;
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END PROCESS fill_coeff;
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-- instanciation of the shift-reg for polyphasd filter
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shift_reg_inst : ENTITY work.POLY_SHIFT_REG(Fill_Matrix)
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PORT MAP (i_clk => i_clk,
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i_data => i_data,
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o_data => matrix3D_reg_out_simple_rif_in
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);
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-- instanciation of the (cst_nb_subfilters) subfilters
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simple_fir_inst_loop : FOR i IN 0 TO cst_nb_subfilters-1 GENERATE
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simple_fir_inst : ENTITY work.TREE_FIR(Simple_Fir)
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PORT MAP(i_clk => i_clk,
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i_coeffs => matrix_coeffs(i),
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i_data => matrix3D_reg_out_simple_rif_in(i),
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o_data => matrix_fir_out(i)
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);
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END GENERATE simple_fir_inst_loop;
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o_data <= matrix_fir_out;
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END ARCHITECTURE polyphase;
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