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funktional mit abweichung

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binnerda82916 2024-12-17 22:33:34 +01:00
parent cdbe7515b9
commit 85a5403150
1 changed files with 44 additions and 37 deletions
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55
hardware/signal_processing/fft.vhd
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@ -52,6 +52,7 @@
type fft_state_dec is (
FFT_STATE_IDLE,
FFT_STATE_READ,
FFT_STATE_FILL_IP_CORE,
FFT_STATE_GET_IP_CORE,
FFT_STATE_SORT,
@ -98,18 +99,17 @@
signal value_data_out_mag : std_logic_vector(31 downto 0);
signal value_data_out_mag_float : std_logic_vector(31 downto 0);
signal value_data_out_mag_float_scaled : std_logic_vector(31 downto 0);
type memory_array is array (0 to work.task.STREAM_LEN - 1) of std_logic_vector(31 downto 0);
signal memory : memory_array := (others => (others => '0'));
signal sorted_memory : memory_array := (others => (others => '0'));
signal bitsort_index : integer range 0 to work.task.STREAM_LEN;
signal bitsort_index_temp: integer range 0 to work.task.STREAM_LEN;
signal bitsort_index_out : integer range 0 to work.task.STREAM_LEN;
signal input_vector : std_logic_vector(work.task.STREAM_LEN-1 downto 0);
signal reversed_bits : std_logic_vector(work.task.STREAM_LEN-1 downto 0);
signal a_vec : std_logic_vector(9 downto 0); -- Vector for 1024 range
signal b_vec : std_logic_vector(9 downto 0); -- Reversed vector
signal a : integer range 0 to 1023 := 100; -- Example input integer
signal b : integer range 0 to 1023; -- Reversed integer output
signal read_wait : integer range 0 to 4;
signal value_mag_in_ready: std_logic;
signal value_mag_out_ready: std_logic;
@ -195,8 +195,9 @@
end process sync;
fft : process (clk, reset) is
variable fifo_in : signed(31 downto 0);
variable fifo_out : signed(31 downto 0);
begin
-- Bei Reset alle Signale zurücksetzen
if ( reset = '1' ) then
@ -211,7 +212,7 @@
a_vec <= (others => '0');
b_vec <= (others => '0');
b <= 0;
a <= 0;
read_wait <= 0;
-- Für jeden Takt fft_state Zustandsmaschine aufrufen.
elsif ( rising_edge( clk ) ) then
@ -220,34 +221,42 @@
flag_index <= '0';
if ( current_task_state = work.task.TASK_RUNNING ) then
fft_state <= FFT_STATE_FILL_IP_CORE;
signal_read <= '1';
end if;
when FFT_STATE_READ =>
read_wait <= read_wait + 1;
if (read_wait = 1) then
fft_state <= FFT_STATE_FILL_IP_CORE;
end if;
when FFT_STATE_FILL_IP_CORE =>
value_data_in_ready <= '1';
signal_read <= '1';
value_data_in_real <= signal_readdata;
if value_data_in_real(30 downto 23) = "00000000" then
value_data_in_real_scaled_fixed <= to_fixed(value_data_in_real);
value_data_in_real_scaled(31) <= value_data_in_real(31);
value_data_in_real_scaled(22 downto 0) <= std_logic_vector(signed(value_data_in_real(22 downto 0)));
if value_data_in_real_scaled(30 downto 23) = "00000000" then
value_data_in_real_scaled(30 downto 23) <= std_logic_vector(signed(value_data_in_real(30 downto 23)));
else
fifo_in(31) := value_data_in_real(31);
fifo_in(30 downto 23) := signed(value_data_in_real(30 downto 23)) - 4;
fifo_in(22 downto 0) := signed(value_data_in_real(22 downto 0));
value_data_in_real_scaled_fixed <= to_fixed(std_logic_vector(fifo_in));
value_data_in_real_scaled(30 downto 23) <= std_logic_vector(signed(value_data_in_real(30 downto 23)) - 4);
end if;
value_data_in_real_scaled_fixed <= to_fixed(std_logic_vector(value_data_in_real_scaled));
if (value_data_out_ready = '1') then
fft_state <= FFT_STATE_GET_IP_CORE;
signal_read <= '0';
value_mag_in_ready <= '1';
end if;
when FFT_STATE_GET_IP_CORE =>
signal_read <= '0';
value_mag_in_ready <= '1';
if (value_mag_out_ready = '1') then
value_data_out_mag_float <= to_float(value_data_out_mag);
@ -259,10 +268,8 @@
value_data_out_mag_float_scaled(30 downto 23) <= std_logic_vector(signed(value_data_out_mag_float(30 downto 23)) + 5);
end if;
memory(index) <= value_data_out_mag_float_scaled;
if (value_mag_out_ready = '1') then
flag_index <= '1';
end if;
@ -270,8 +277,7 @@
--value_data_in_ready <= '0';
flag_index <= '0';
bitsort_index <= 0;
bitsort_index_temp <= 0;
bitsort_index_out <= 0;
fft_state <= FFT_STATE_SORT;
end if;
@ -285,7 +291,8 @@
b <= to_integer(unsigned(b_vec));
sorted_memory(b) <= memory(bitsort_index);
sorted_memory(bitsort_index) <= memory(b);
bitsort_index <= bitsort_index + 1;
if (bitsort_index = work.task.STREAM_LEN - 1) then