[24] | 1 | ---------------------------------------------------------------------------------- |
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| 2 | -- Company: |
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| 3 | -- Engineer: |
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| 4 | -- |
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| 5 | -- Create Date: 18:01:21 10/23/2012 |
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| 6 | -- Design Name: |
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| 7 | -- Module Name: proto_send - Behavioral |
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| 8 | -- Project Name: |
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| 9 | -- Target Devices: |
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| 10 | -- Tool versions: |
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| 11 | -- Description: |
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| 12 | -- |
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| 13 | -- Dependencies: |
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| 14 | -- |
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| 15 | -- Revision: |
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| 16 | -- Revision 0.01 - File Created |
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| 17 | -- Additional Comments: |
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| 18 | -- |
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| 19 | ---------------------------------------------------------------------------------- |
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| 20 | library IEEE; |
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| 21 | use IEEE.STD_LOGIC_1164.ALL; |
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| 22 | USE ieee.numeric_std.ALL; |
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| 23 | use work.CoreTypes.all; |
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| 24 | -- Uncomment the following library declaration if using |
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| 25 | -- arithmetic functions with Signed or Unsigned values |
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| 26 | --use IEEE.NUMERIC_STD.ALL; |
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| 27 | |
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| 28 | -- Uncomment the following library declaration if instantiating |
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| 29 | -- any Xilinx primitives in this code. |
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| 30 | --library UNISIM; |
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| 31 | --use UNISIM.VComponents.all; |
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| 32 | |
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| 33 | entity proto_send is |
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| 34 | generic (sizemem : natural := 64); |
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| 35 | port ( |
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| 36 | clk,reset : in std_logic; |
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| 37 | fifo_empty,fifo_full : in std_logic; |
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| 38 | push : out std_logic:='0'; |
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| 39 | fifo_in : out std_logic_vector(Word-1 downto 0); |
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| 40 | snd_start : in std_logic; --début de la réception |
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| 41 | snd_ack :in std_logic; -- acquittement de la réception |
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| 42 | snd_comp : out std_logic; -- fin de la réception |
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| 43 | mem :in memory(0 to sizemem-1)); |
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| 44 | |
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| 45 | end proto_send; |
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| 46 | |
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| 47 | architecture Behavioral of proto_send is |
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| 48 | type typ_send is (s_head,s_len,s_len2,s_data,s_pulse,s_end); |
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| 49 | signal etsnd : typ_send; |
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| 50 | signal sfifo_in : std_logic_vector(Word-1 downto 0); |
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| 51 | signal spush : std_logic:='0'; |
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| 52 | begin |
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| 53 | |
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| 54 | proc_send : process (clk,reset) |
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| 55 | variable dlen,i: natural range 0 to 255 :=0; |
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| 56 | begin |
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| 57 | if reset='1' then |
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| 58 | etsnd<=s_head; |
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| 59 | |
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| 60 | else |
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| 61 | if rising_edge(clk) then -- le process s'exécute sur chaque front |
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| 62 | -- montant de l'horloge |
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| 63 | case etsnd is |
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| 64 | when s_head => |
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| 65 | sfifo_in<=mem(0); |
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| 66 | snd_comp<='0'; |
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| 67 | i:=0; |
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| 68 | |
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| 69 | if fifo_empty='1' and snd_start='1' then |
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| 70 | spush<='1'; |
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| 71 | snd_comp<='0'; |
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| 72 | etsnd<=s_len; |
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| 73 | end if; |
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| 74 | when s_pulse => |
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| 75 | spush<='1'; |
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| 76 | etsnd<=s_len; |
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| 77 | when s_len => |
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| 78 | sfifo_in<=mem(1); --8 données |
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| 79 | i:=i+1; |
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| 80 | dlen:=to_integer(unsigned(mem(i))); |
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| 81 | spush<='1'; |
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| 82 | snd_comp<='0'; |
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| 83 | etsnd<=s_data; |
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| 84 | when s_len2 => |
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| 85 | snd_comp<='0'; |
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| 86 | etsnd<=s_data; |
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| 87 | |
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| 88 | when s_data => |
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| 89 | if fifo_full='0' then |
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| 90 | i:=i+1; |
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| 91 | sfifo_in<=mem(i); |
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| 92 | if i=dlen-2 then |
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| 93 | etsnd<=s_end; |
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| 94 | snd_comp<='1'; |
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| 95 | spush<='1'; |
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| 96 | else |
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| 97 | spush<='1'; |
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| 98 | end if; |
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| 99 | |
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| 100 | else |
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| 101 | spush<='0'; |
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| 102 | end if; |
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| 103 | |
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| 104 | when s_end => |
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| 105 | spush<='0'; |
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| 106 | etsnd<=s_head; |
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| 107 | sfifo_in<=(others=>'-'); |
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| 108 | if snd_ack='1' then |
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| 109 | etsnd<=s_head; |
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| 110 | end if; |
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| 111 | when others => |
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| 112 | spush<='0'; |
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| 113 | etsnd<=s_head; |
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| 114 | sfifo_in<=(others=>'0'); |
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| 115 | end case; |
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| 116 | end if; |
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| 117 | end if; |
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| 118 | end process; |
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| 119 | |
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| 120 | -- affectation concurentes |
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| 121 | |
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| 122 | push<=spush; |
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| 123 | fifo_in<=sfifo_in; |
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| 124 | end Behavioral; |
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| 125 | |
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