| 1 |
7 |
dbrochart |
----------------------------------------------------------------------
|
| 2 |
|
|
---- ----
|
| 3 |
|
|
---- punct_synth.vhd ----
|
| 4 |
|
|
---- ----
|
| 5 |
|
|
---- This file is part of the turbo decoder IP core project ----
|
| 6 |
|
|
---- http://www.opencores.org/projects/turbocodes/ ----
|
| 7 |
|
|
---- ----
|
| 8 |
|
|
---- Author(s): ----
|
| 9 |
|
|
---- - David Brochart(dbrochart@opencores.org) ----
|
| 10 |
|
|
---- ----
|
| 11 |
|
|
---- All additional information is available in the README.txt ----
|
| 12 |
|
|
---- file. ----
|
| 13 |
|
|
---- ----
|
| 14 |
|
|
----------------------------------------------------------------------
|
| 15 |
|
|
---- ----
|
| 16 |
|
|
---- Copyright (C) 2005 Authors ----
|
| 17 |
|
|
---- ----
|
| 18 |
|
|
---- This source file may be used and distributed without ----
|
| 19 |
|
|
---- restriction provided that this copyright statement is not ----
|
| 20 |
|
|
---- removed from the file and that any derivative work contains ----
|
| 21 |
|
|
---- the original copyright notice and the associated disclaimer. ----
|
| 22 |
|
|
---- ----
|
| 23 |
|
|
---- This source file is free software; you can redistribute it ----
|
| 24 |
|
|
---- and/or modify it under the terms of the GNU Lesser General ----
|
| 25 |
|
|
---- Public License as published by the Free Software Foundation; ----
|
| 26 |
|
|
---- either version 2.1 of the License, or (at your option) any ----
|
| 27 |
|
|
---- later version. ----
|
| 28 |
|
|
---- ----
|
| 29 |
|
|
---- This source is distributed in the hope that it will be ----
|
| 30 |
|
|
---- useful, but WITHOUT ANY WARRANTY; without even the implied ----
|
| 31 |
|
|
---- warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR ----
|
| 32 |
|
|
---- PURPOSE. See the GNU Lesser General Public License for more ----
|
| 33 |
|
|
---- details. ----
|
| 34 |
|
|
---- ----
|
| 35 |
|
|
---- You should have received a copy of the GNU Lesser General ----
|
| 36 |
|
|
---- Public License along with this source; if not, download it ----
|
| 37 |
|
|
---- from http://www.opencores.org/lgpl.shtml ----
|
| 38 |
|
|
---- ----
|
| 39 |
|
|
----------------------------------------------------------------------
|
| 40 |
|
|
|
| 41 |
|
|
|
| 42 |
|
|
|
| 43 |
|
|
architecture synth of punct is
|
| 44 |
|
|
subtype cnt_t is integer range 0 to 6;
|
| 45 |
|
|
signal pattern : std_logic_vector(0 to 11);
|
| 46 |
|
|
signal cntMax : cnt_t;
|
| 47 |
|
|
signal cnt : cnt_t;
|
| 48 |
|
|
signal ySel : std_logic;
|
| 49 |
|
|
signal wSel : std_logic;
|
| 50 |
|
|
begin
|
| 51 |
|
|
pattern_g13 : if RATE = 13 generate
|
| 52 |
|
|
pattern <= "110000000000";
|
| 53 |
|
|
cntMax <= 1;
|
| 54 |
|
|
end generate;
|
| 55 |
|
|
pattern_g25 : if RATE = 25 generate
|
| 56 |
|
|
pattern <= "111000000000";
|
| 57 |
|
|
cntMax <= 2;
|
| 58 |
|
|
end generate;
|
| 59 |
|
|
pattern_g12 : if RATE = 12 generate
|
| 60 |
|
|
pattern <= "100000000000";
|
| 61 |
|
|
cntMax <= 1;
|
| 62 |
|
|
end generate;
|
| 63 |
|
|
pattern_g23 : if RATE = 23 generate
|
| 64 |
|
|
pattern <= "100000000000";
|
| 65 |
|
|
cntMax <= 2;
|
| 66 |
|
|
end generate;
|
| 67 |
|
|
pattern_g34 : if RATE = 34 generate
|
| 68 |
|
|
pattern <= "100000000000";
|
| 69 |
|
|
cntMax <= 3;
|
| 70 |
|
|
end generate;
|
| 71 |
|
|
pattern_g45 : if RATE = 45 generate
|
| 72 |
|
|
pattern <= "100000000000";
|
| 73 |
|
|
cntMax <= 4;
|
| 74 |
|
|
end generate;
|
| 75 |
|
|
pattern_g67 : if RATE = 67 generate
|
| 76 |
|
|
pattern <= "100000000000";
|
| 77 |
|
|
cntMax <= 6;
|
| 78 |
|
|
end generate;
|
| 79 |
|
|
|
| 80 |
|
|
process(clk, rst)
|
| 81 |
|
|
begin
|
| 82 |
|
|
if rst = '0' then
|
| 83 |
|
|
ySel <= '0';
|
| 84 |
|
|
wSel <= '0';
|
| 85 |
|
|
cnt <= 0;
|
| 86 |
|
|
elsif clk = '1' and clk'event then
|
| 87 |
|
|
if cnt < cntMax - 1 then
|
| 88 |
|
|
cnt <= cnt + 1;
|
| 89 |
|
|
else
|
| 90 |
|
|
cnt <= 0;
|
| 91 |
|
|
end if;
|
| 92 |
|
|
ySel <= pattern(cnt);
|
| 93 |
|
|
wSel <= pattern(cntMax + cnt);
|
| 94 |
|
|
end if;
|
| 95 |
|
|
end process;
|
| 96 |
|
|
|
| 97 |
|
|
yPunct <= y when ySel = '1' else
|
| 98 |
|
|
(others => '0');
|
| 99 |
|
|
wPunct <= w when wSel = '1' else
|
| 100 |
|
|
(others => '0');
|
| 101 |
|
|
yIntPunct <= yInt when ySel = '1' else
|
| 102 |
|
|
(others => '0');
|
| 103 |
|
|
wIntPunct <= wInt when wSel = '1' else
|
| 104 |
|
|
(others => '0');
|
| 105 |
|
|
end;
|
