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LIBRARY ieee;
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USE ieee.std_logic_1164.ALL;
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USE ieee.numeric_std.ALL;
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LIBRARY std;
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USE std.textio.ALL;
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ENTITY spw_receiver IS
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GENERIC(
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FNAME : STRING := "output.txt"
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);
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PORT(
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end_of_simu : IN STD_LOGIC;
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timestamp : IN integer;
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clk : IN STD_LOGIC;
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rxread : out STD_LOGIC;
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rxflag : in STD_LOGIC;
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rxdata : in STD_LOGIC_VECTOR(7 DOWNTO 0);
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rxvalid : in STD_LOGIC;
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rxhalff : out STD_LOGIC
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);
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END spw_receiver;
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ARCHITECTURE beh OF spw_receiver IS
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FILE output_file : TEXT OPEN write_mode IS FNAME;
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SIGNAL message_ongoing : STD_LOGIC := '0';
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SIGNAL message_timestamp : INTEGER;
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BEGIN
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-----------------------------------------------------------------------------
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-- Data orginization in the output file :
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-----------------------------------------------------------------------------
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-- Exemple of output.txt file :
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-- Data_1
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-- Data_2
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-- ...
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-- Data_N
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-- TIME= TimeStamp_when_Data_1_was_received
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-- Data_N+1
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-- Data_N+2
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-- ...
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-- Data_M
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-- TIME= TimeStamp_when_Data_N+1_was_received
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-- Data_M+1
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-- Data_M+2
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-- ...
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-- Data_K
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-- TIME= TimeStamp_when_Data_M+1_was_received
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-----------------------------------------------------------------------------
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-- TimeStamp : integer. Waiting time (in ns) before to send the following message
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-- Data : integer(0 to 255). A part of the message.
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-----------------------------------------------------------------------------
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PROCESS(clk,end_of_simu)
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VARIABLE line_var : LINE;
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BEGIN
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IF end_of_simu = '1' THEN
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file_close(output_file);
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rxread <= '0';
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ELSIF clk'EVENT AND clk = '1' THEN
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rxread <= '1';
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IF rxvalid = '1' THEN
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IF rxflag = '1' THEN
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write(line_var, "TIME= " & INTEGER'IMAGE(message_timestamp));
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message_ongoing <= '0';
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ELSE
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IF message_ongoing = '0' THEN
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message_ongoing <= '1';
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message_timestamp <= TimeStamp;
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END IF;
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write(line_var, INTEGER'IMAGE(to_integer(UNSIGNED(rxdata))));
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END IF;
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writeline(output_file, line_var);
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END IF;
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END IF;
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END PROCESS;
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END beh;
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