|
|
LIBRARY IEEE;
|
|
|
USE IEEE.STD_LOGIC_1164.ALL;
|
|
|
USE ieee.numeric_std.ALL;
|
|
|
|
|
|
ENTITY lpp_waveform_snapshot IS
|
|
|
|
|
|
GENERIC (
|
|
|
data_size : INTEGER := 16;
|
|
|
nb_snapshot_param_size : INTEGER := 11);
|
|
|
|
|
|
PORT (
|
|
|
clk : IN STD_LOGIC;
|
|
|
rstn : IN STD_LOGIC;
|
|
|
run : IN STD_LOGIC;
|
|
|
|
|
|
enable : IN STD_LOGIC;
|
|
|
burst_enable : IN STD_LOGIC;
|
|
|
nb_snapshot_param : IN STD_LOGIC_VECTOR(nb_snapshot_param_size-1 DOWNTO 0);
|
|
|
|
|
|
start_snapshot : IN STD_LOGIC;
|
|
|
|
|
|
data_in : IN STD_LOGIC_VECTOR(data_size-1 DOWNTO 0);
|
|
|
data_in_valid : IN STD_LOGIC;
|
|
|
|
|
|
data_out : OUT STD_LOGIC_VECTOR(data_size-1 DOWNTO 0);
|
|
|
data_out_valid : OUT STD_LOGIC
|
|
|
);
|
|
|
|
|
|
END lpp_waveform_snapshot;
|
|
|
|
|
|
ARCHITECTURE beh OF lpp_waveform_snapshot IS
|
|
|
SIGNAL counter_points_snapshot : INTEGER;
|
|
|
BEGIN -- beh
|
|
|
|
|
|
PROCESS (clk, rstn)
|
|
|
BEGIN
|
|
|
IF rstn = '0' THEN
|
|
|
data_out <= (OTHERS => '0');
|
|
|
data_out_valid <= '0';
|
|
|
counter_points_snapshot <= 0;
|
|
|
ELSIF clk'EVENT AND clk = '1' THEN
|
|
|
data_out <= data_in;
|
|
|
IF enable = '0' OR run = '0' THEN
|
|
|
data_out_valid <= '0';
|
|
|
counter_points_snapshot <= 0;
|
|
|
ELSE
|
|
|
IF burst_enable = '1' THEN
|
|
|
-- BURST ModE --
|
|
|
data_out_valid <= data_in_valid;
|
|
|
counter_points_snapshot <= 0;
|
|
|
ELSE
|
|
|
-- SNAPShOT MODE --
|
|
|
IF start_snapshot = '1' THEN
|
|
|
IF data_in_valid = '1' THEN
|
|
|
counter_points_snapshot <= to_integer(unsigned(nb_snapshot_param)) - 1;
|
|
|
data_out_valid <= '1';
|
|
|
ELSE
|
|
|
counter_points_snapshot <= to_integer(unsigned(nb_snapshot_param));
|
|
|
data_out_valid <= '0';
|
|
|
END IF;
|
|
|
ELSE
|
|
|
IF data_in_valid = '1' THEN
|
|
|
IF counter_points_snapshot > 0 THEN
|
|
|
counter_points_snapshot <= counter_points_snapshot - 1;
|
|
|
data_out_valid <= '1';
|
|
|
ELSE
|
|
|
counter_points_snapshot <= counter_points_snapshot;
|
|
|
data_out_valid <= '0';
|
|
|
END IF;
|
|
|
ELSE
|
|
|
counter_points_snapshot <= counter_points_snapshot;
|
|
|
data_out_valid <= '0';
|
|
|
END IF;
|
|
|
END IF;
|
|
|
|
|
|
END IF;
|
|
|
END IF;
|
|
|
END IF;
|
|
|
END PROCESS;
|
|
|
|
|
|
END beh;
|
|
|
|
