| Line 46... |
Line 46... |
--
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--
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-- c0f0 c0f1 c0f2 ... c0f15 c1f0 c1f1 c1f2 ... c1f15 (c0f0 means channel 0, frequency bin 0)
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-- c0f0 c0f1 c0f2 ... c0f15 c1f0 c1f1 c1f2 ... c1f15 (c0f0 means channel 0, frequency bin 0)
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--
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--
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--
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--
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|
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library ieee, common_pkg_lib, common_components_lib, common_requantize_lib, rTwoSDF_lib;
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library ieee, common_pkg_lib, common_components_lib, astron_requantize_lib, astron_r2sdf_fft_lib;
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use IEEE.std_logic_1164.all;
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use IEEE.std_logic_1164.all;
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use common_pkg_lib.common_pkg.all;
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use common_pkg_lib.common_pkg.all;
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use rTwoSDF_lib.rTwoSDFPkg.all;
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use astron_r2sdf_fft_lib.rTwoSDFPkg.all;
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use work.fft_pkg.all;
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use work.fft_pkg.all;
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|
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entity fft_r2_pipe is
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entity fft_r2_pipe is
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generic (
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generic (
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g_fft : t_fft := c_fft; -- generics for the FFT
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g_fft : t_fft := c_fft; -- generics for the FFT
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g_pipeline : t_fft_pipeline := c_fft_pipeline; -- generics for pipelining in each stage, defined in rTwoSDF_lib.rTwoSDFPkg
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g_pipeline : t_fft_pipeline := c_fft_pipeline; -- generics for pipelining in each stage, defined in astron_r2sdf_fft_lib.rTwoSDFPkg
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g_dont_flip_channels : boolean := false -- generic to prevent re-ordering of the channels
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g_dont_flip_channels : boolean := false -- generic to prevent re-ordering of the channels
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);
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);
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port (
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port (
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clk : in std_logic;
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clk : in std_logic;
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rst : in std_logic := '0';
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rst : in std_logic := '0';
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| Line 105... |
Line 105... |
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------------------------------------------------------------------------------
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------------------------------------------------------------------------------
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-- pipelined FFT stages
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-- pipelined FFT stages
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------------------------------------------------------------------------------
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------------------------------------------------------------------------------
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gen_fft: for stage in c_nof_stages downto 1 generate
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gen_fft: for stage in c_nof_stages downto 1 generate
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u_stage : entity rTwoSDF_lib.rTwoSDFStage
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u_stage : entity astron_r2sdf_fft_lib.rTwoSDFStage
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generic map (
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generic map (
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g_nof_chan => g_fft.nof_chan,
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g_nof_chan => g_fft.nof_chan,
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g_stage => stage,
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g_stage => stage,
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g_stage_offset => c_stage_offset,
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g_stage_offset => c_stage_offset,
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g_twiddle_offset => g_fft.twiddle_offset,
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g_twiddle_offset => g_fft.twiddle_offset,
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| Line 164... |
Line 164... |
end generate;
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end generate;
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------------------------------------------------------------------------------
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------------------------------------------------------------------------------
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-- pipelined FFT output requantization
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-- pipelined FFT output requantization
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------------------------------------------------------------------------------
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------------------------------------------------------------------------------
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u_requantize_re : entity common_requantize_lib.common_requantize
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u_requantize_re : entity astron_requantize_lib.common_requantize
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generic map (
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generic map (
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g_representation => "SIGNED",
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g_representation => "SIGNED",
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g_lsb_w => c_out_scale_w,
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g_lsb_w => c_out_scale_w,
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g_lsb_round => TRUE,
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g_lsb_round => TRUE,
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g_lsb_round_clip => FALSE,
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g_lsb_round_clip => FALSE,
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| Line 184... |
Line 184... |
in_dat => raw_out_re,
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in_dat => raw_out_re,
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out_dat => out_re,
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out_dat => out_re,
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out_ovr => open
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out_ovr => open
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);
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);
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|
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u_requantize_im : entity common_requantize_lib.common_requantize
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u_requantize_im : entity astron_requantize_lib.common_requantize
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generic map (
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generic map (
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g_representation => "SIGNED",
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g_representation => "SIGNED",
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g_lsb_w => c_out_scale_w,
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g_lsb_w => c_out_scale_w,
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g_lsb_round => TRUE,
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g_lsb_round => TRUE,
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g_lsb_round_clip => FALSE,
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g_lsb_round_clip => FALSE,
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