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| LIBRARY ieee; | |||
| USE ieee.std_logic_1164.ALL; | |||
| USE ieee.numeric_std.ALL; | |||
| USE ieee.std_logic_unsigned.ALL; | |||
| USE ieee.std_logic_signed.ALL; | |||
| USE work.PFB_PKG.ALL; | |||
| PACKAGE POLY_FIR_PKG IS | |||
| -- NOTES and PACKAGE INSTRUCTIONS : | |||
| -- cst_downsampling_factor must be a multiplier OF cst_nb_samples_adc_in | |||
| -- and cst_nb_subfilters/cst_nb_samples_adc_in*cst_downsampling_factor must be an integer | |||
| -- with cst_downsampling_factor < or = cst_nb_subfilters. | |||
| -- | |||
| -- INPUT : vector of samples (cst_nb_samples_adc_in samples); | |||
| -- OUTPUT : 2D matrix of samples (matrix_fir_data_out(y)(x), with y the | |||
| -- subfilter number, and x the xth parallel fir); | |||
| -- | |||
| -- the lower parallel fir, the older result. | |||
| -- -- CONSTANTS -- -- | |||
| -- ADC | |||
| CONSTANT cst_w_in : natural := cst_w_in_pfb ; -- ADC in bitwidth | |||
| CONSTANT cst_w_out : natural := cst_w_polyfir_out_dft_in_pfb; | |||
| CONSTANT cst_nb_samples_adc_in : natural := cst_nb_samples_adc_in_pfb; -- ADC in nb samples | |||
| -- FILTER | |||
| --coefficients | |||
| CONSTANT cst_w_coeff : natural := cst_w_coeffs_polyfir_pfb; -- coeffs bitwidth | |||
| CONSTANT cst_nb_coeffs_filter_in : natural := cst_nb_coeffs_polyfir_pfb; | |||
| -- FIR | |||
| CONSTANT cst_downsampling_factor : natural := cst_polyfir_downsampling_factor_pfb; | |||
| -- POLYPHASE FILTER | |||
| CONSTANT cst_nb_subfilters : natural := cst_nb_subfilters_pfb; | |||
| -- -- CALCULATIONS -- -- | |||
| -- SHIFT REG | |||
| CONSTANT cst_nb_coeffs_subfilter_in : natural := cst_nb_coeffs_filter_in/cst_nb_subfilters; | |||
| CONSTANT cst_log2_sup_nb_coeffs_subfilter_in : natural := cst_log2_sup_nb_coeffs_subfilter_pfb; | |||
| CONSTANT cst_nb_samples_shiftreg_temp_in : natural := cst_nb_coeffs_subfilter_in + cst_nb_samples_adc_in/cst_downsampling_factor; | |||
| -- mult | |||
| CONSTANT cst_w_mult_out : natural := cst_w_coeff+cst_w_in; | |||
| -- adder | |||
| CONSTANT cst_log2_adder_stages : natural := cst_log2_sup_nb_coeffs_subfilter_in; | |||
| -- fir | |||
| CONSTANT cst_w_fir_adder_out : natural := cst_w_mult_out+cst_log2_adder_stages; | |||
| CONSTANT cst_nb_parallel_firs : natural := cst_nb_parallel_firs_dfts_pfb; | |||
| -- TYPES | |||
| -- ADC | |||
| SUBTYPE smpl_adc_data_in IS smpl_real_imag_adc_data_in_pfb; | |||
| SUBTYPE smpl_fir_data_out IS smpl_real_imag_polyfir_out_dft_in_pfb; | |||
| -- SHIFT REG | |||
| TYPE vect_adc_data_out IS ARRAY (0 TO cst_nb_samples_adc_in-1) OF smpl_adc_data_in; | |||
| TYPE vect_fir_data_in IS ARRAY(0 TO cst_nb_coeffs_subfilter_in-1) OF smpl_adc_data_in; | |||
| TYPE vect_reg_data IS ARRAY(0 TO cst_nb_samples_shiftreg_temp_in-1) OF smpl_adc_data_in; | |||
| TYPE matrix_reg_data IS ARRAY(0 TO cst_nb_subfilters-1) OF vect_reg_data; | |||
| TYPE matrix_reg_data_out IS ARRAY(0 TO cst_nb_parallel_firs-1) OF vect_fir_data_in; | |||
| TYPE matrix3D_reg_data_out IS ARRAY (0 TO cst_nb_subfilters-1) OF matrix_reg_data_out; | |||
| -- FILTER | |||
| SUBTYPE smpl_coeff IS std_logic_vector(cst_w_coeff-1 DOWNTO 0); | |||
| -- mult | |||
| SUBTYPE smpl_mult_data_out IS std_logic_vector(cst_w_mult_out-1 DOWNTO 0); | |||
| SUBTYPE smpl_mult_data_out_signed IS signed(cst_w_mult_out-1 DOWNTO 0); | |||
| SUBTYPE smpl_coeffs_signed IS signed(cst_w_coeff-1 DOWNTO 0); | |||
| SUBTYPE smpl_mult_data_in_signed IS signed(cst_w_in-1 DOWNTO 0); | |||
| TYPE vect_polyfir_coeffs_in IS ARRAY (0 TO cst_nb_coeffs_filter_in-1) OF smpl_coeff; | |||
| TYPE vect_data_mult_in_signed IS ARRAY(0 TO cst_nb_coeffs_subfilter_in-1) OF smpl_mult_data_in_signed; | |||
| TYPE vect_fir_coeffs_in IS ARRAY(0 TO cst_nb_coeffs_subfilter_in-1) OF smpl_coeff; | |||
| TYPE vect_mult_coeffs_signed IS ARRAY(0 TO cst_nb_coeffs_subfilter_in-1) OF smpl_coeffs_signed; | |||
| TYPE vect_mult_data_out IS ARRAY(0 TO cst_nb_coeffs_subfilter_in-1) OF smpl_mult_data_out; | |||
| TYPE vect_mult_data_out_signed IS ARRAY(0 TO cst_nb_coeffs_subfilter_in-1) OF smpl_mult_data_out_signed; | |||
| TYPE matrix_fir_coeffs_in IS ARRAY (0 TO cst_nb_subfilters-1) OF vect_fir_coeffs_in; | |||
| -- adder | |||
| TYPE vect_adder_generic IS ARRAY(0 TO 2**(cst_log2_adder_stages)-1) OF std_logic_vector(cst_w_fir_adder_out-1 DOWNTO 0); | |||
| TYPE vect_adder_generic_signed IS ARRAY(0 TO 2**(cst_log2_adder_stages)-1) OF signed(cst_w_fir_adder_out-1 DOWNTO 0); | |||
| TYPE matrix_adder_generic IS ARRAY(0 TO cst_log2_adder_stages) OF vect_adder_generic; | |||
| TYPE matrix_adder_generic_signed IS ARRAY(0 TO cst_log2_adder_stages) OF vect_adder_generic_signed; | |||
| -- fir | |||
| SUBTYPE smpl_fir_adder_data_out IS std_logic_vector(cst_w_fir_adder_out-1 DOWNTO 0); | |||
| TYPE vect_fir_adder_data_out IS ARRAY (0 TO cst_nb_parallel_firs-1) OF smpl_fir_adder_data_out; | |||
| TYPE vect_fir_data_out IS ARRAY(0 TO cst_nb_parallel_firs-1) OF smpl_fir_data_out; | |||
| -- POLYPHASE FILTER | |||
| TYPE matrix_fir_data_out IS ARRAY (0 TO cst_nb_subfilters-1) OF vect_fir_data_out; | |||
| END; | |||