URL
https://opencores.org/ocsvn/w11/w11/trunk
Subversion Repositories w11
[/] [w11/] [tags/] [w11a_V0.7/] [rtl/] [vlib/] [comlib/] [comlib.vhd] - Rev 36
Go to most recent revision | Compare with Previous | Blame | View Log
-- $Id: comlib.vhd 641 2015-02-01 22:12:15Z mueller $ -- -- Copyright 2007-2014 by Walter F.J. Mueller <W.F.J.Mueller@gsi.de> -- -- This program is free software; you may redistribute and/or modify it under -- the terms of the GNU General Public License as published by the Free -- Software Foundation, either version 2, or at your option any later version. -- -- This program is distributed in the hope that it will be useful, but -- WITHOUT ANY WARRANTY, without even the implied warranty of MERCHANTABILITY -- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License -- for complete details. -- ------------------------------------------------------------------------------ -- Package Name: comlib -- Description: communication components -- -- Dependencies: - -- Tool versions: ise 8.2-14.7; viv 2014.4; ghdl 0.18-0.31 -- Revision History: -- Date Rev Version Comment -- 2014-09-27 595 1.6 add crc16 (using CRC-CCITT polynomial) -- 2014-09-14 593 1.5 new iface for cdata2byte and byte2cdata -- 2011-09-17 410 1.4 now numeric_std clean; use for crc8 'A6' polynomial -- of Koopman et al.; crc8_update(_tbl) now function -- 2011-07-30 400 1.3 added byte2word, word2byte -- 2007-10-12 88 1.2.1 avoid ieee.std_logic_unsigned, use cast to unsigned -- 2007-07-08 65 1.2 added procedure crc8_update_tbl -- 2007-06-29 61 1.1.1 rename for crc8 SALT->INIT -- 2007-06-17 58 1.1 add crc8 -- 2007-06-03 45 1.0 Initial version ------------------------------------------------------------------------------ library ieee; use ieee.std_logic_1164.all; use ieee.numeric_std.all; use work.slvtypes.all; package comlib is component byte2word is -- 2 byte -> 1 word stream converter port ( CLK : in slbit; -- clock RESET : in slbit; -- reset DI : in slv8; -- input data (byte) ENA : in slbit; -- write enable BUSY : out slbit; -- write port hold DO : out slv16; -- output data (word) VAL : out slbit; -- read valid HOLD : in slbit; -- read hold ODD : out slbit -- odd byte pending ); end component; component word2byte is -- 1 word -> 2 byte stream converter port ( CLK : in slbit; -- clock RESET : in slbit; -- reset DI : in slv16; -- input data (word) ENA : in slbit; -- write enable BUSY : out slbit; -- write port hold DO : out slv8; -- output data (byte) VAL : out slbit; -- read valid HOLD : in slbit; -- read hold ODD : out slbit -- odd byte pending ); end component; constant c_cdata_escape : slv8 := "11001010"; -- char escape constant c_cdata_fill : slv8 := "11010101"; -- char fill constant c_cdata_xon : slv8 := "00010001"; -- char xon: ^Q = hex 11 constant c_cdata_xoff : slv8 := "00010011"; -- char xoff: ^S = hex 13 constant c_cdata_ec_xon : slv3 := "100"; -- escape code: xon constant c_cdata_ec_xoff : slv3 := "101"; -- escape code: xoff constant c_cdata_ec_fill : slv3 := "110"; -- escape code: fill constant c_cdata_ec_esc : slv3 := "111"; -- escape code: escape constant c_cdata_ed_pref : slv2 := "01"; -- edata: prefix subtype c_cdata_edf_pref is integer range 7 downto 6; -- edata pref field subtype c_cdata_edf_eci is integer range 5 downto 3; -- edata inv field subtype c_cdata_edf_ec is integer range 2 downto 0; -- edata code field component cdata2byte is -- 9bit comma,data -> byte stream port ( CLK : in slbit; -- clock RESET : in slbit; -- reset ESCXON : in slbit; -- enable xon/xoff escaping ESCFILL : in slbit; -- enable fill escaping DI : in slv9; -- input data; bit 8 = comma flag ENA : in slbit; -- input data enable BUSY : out slbit; -- input data busy DO : out slv8; -- output data VAL : out slbit; -- output data valid HOLD : in slbit -- output data hold ); end component; component byte2cdata is -- byte stream -> 9bit comma,data port ( CLK : in slbit; -- clock RESET : in slbit; -- reset DI : in slv8; -- input data ENA : in slbit; -- input data enable ERR : in slbit; -- input data error BUSY : out slbit; -- input data busy DO : out slv9; -- output data; bit 8 = comma flag VAL : out slbit; -- output data valid HOLD : in slbit -- output data hold ); end component; component crc8 is -- crc-8 generator, checker generic ( INIT: slv8 := "00000000"); -- initial state of crc register port ( CLK : in slbit; -- clock RESET : in slbit; -- reset ENA : in slbit; -- update enable DI : in slv8; -- input data CRC : out slv8 -- crc code ); end component; component crc16 is -- crc-16 generator, checker generic ( INIT: slv16 := (others=>'0')); -- initial state of crc register port ( CLK : in slbit; -- clock RESET : in slbit; -- reset ENA : in slbit; -- update enable DI : in slv8; -- input data CRC : out slv16 -- crc code ); end component; function crc8_update (crc : in slv8; data : in slv8) return slv8; function crc8_update_tbl (crc : in slv8; data : in slv8) return slv8; function crc16_update (crc : in slv16; data : in slv8) return slv16; function crc16_update_tbl (crc : in slv16; data : in slv8) return slv16; end package comlib; -- ---------------------------------------------------------------------------- package body comlib is -- crc8_update and crc8_update_tbl implement the 'A6' polynomial of -- Koopman and Chakravarty -- x^8 + x^6 + x^3 + x^2 + 1 (0xa6) -- see -- http://dx.doi.org/10.1109%2FDSN.2004.1311885 -- http://www.ece.cmu.edu/~koopman/roses/dsn04/koopman04_crc_poly_embedded.pdf -- function crc8_update (crc: in slv8; data: in slv8) return slv8 is variable t : slv8 := (others=>'0'); variable n : slv8 := (others=>'0'); begin t := data xor crc; n(0) := t(5) xor t(4) xor t(2) xor t(0); n(1) := t(6) xor t(5) xor t(3) xor t(1); n(2) := t(7) xor t(6) xor t(5) xor t(0); n(3) := t(7) xor t(6) xor t(5) xor t(4) xor t(2) xor t(1) xor t(0); n(4) := t(7) xor t(6) xor t(5) xor t(3) xor t(2) xor t(1); n(5) := t(7) xor t(6) xor t(4) xor t(3) xor t(2); n(6) := t(7) xor t(3) xor t(2) xor t(0); n(7) := t(4) xor t(3) xor t(1); return n; end function crc8_update; function crc8_update_tbl (crc: in slv8; data: in slv8) return slv8 is type crc8_tbl_type is array (0 to 255) of integer; variable crc8_tbl : crc8_tbl_type := -- generated with gen_crc8_tbl ( 0, 77, 154, 215, 121, 52, 227, 174, -- 00-07 242, 191, 104, 37, 139, 198, 17, 92, -- 00-0f 169, 228, 51, 126, 208, 157, 74, 7, -- 10-17 91, 22, 193, 140, 34, 111, 184, 245, -- 10-1f 31, 82, 133, 200, 102, 43, 252, 177, -- 20-27 237, 160, 119, 58, 148, 217, 14, 67, -- 20-2f 182, 251, 44, 97, 207, 130, 85, 24, -- 30-37 68, 9, 222, 147, 61, 112, 167, 234, -- 30-3f 62, 115, 164, 233, 71, 10, 221, 144, -- 40-47 204, 129, 86, 27, 181, 248, 47, 98, -- 40-4f 151, 218, 13, 64, 238, 163, 116, 57, -- 50-57 101, 40, 255, 178, 28, 81, 134, 203, -- 50-5f 33, 108, 187, 246, 88, 21, 194, 143, -- 60-67 211, 158, 73, 4, 170, 231, 48, 125, -- 60-6f 136, 197, 18, 95, 241, 188, 107, 38, -- 70-70 122, 55, 224, 173, 3, 78, 153, 212, -- 70-7f 124, 49, 230, 171, 5, 72, 159, 210, -- 80-87 142, 195, 20, 89, 247, 186, 109, 32, -- 80-8f 213, 152, 79, 2, 172, 225, 54, 123, -- 90-97 39, 106, 189, 240, 94, 19, 196, 137, -- 90-9f 99, 46, 249, 180, 26, 87, 128, 205, -- a0-a7 145, 220, 11, 70, 232, 165, 114, 63, -- a0-af 202, 135, 80, 29, 179, 254, 41, 100, -- b0-b7 56, 117, 162, 239, 65, 12, 219, 150, -- b0-bf 66, 15, 216, 149, 59, 118, 161, 236, -- c0-c7 176, 253, 42, 103, 201, 132, 83, 30, -- c0-cf 235, 166, 113, 60, 146, 223, 8, 69, -- d0-d7 25, 84, 131, 206, 96, 45, 250, 183, -- d0-df 93, 16, 199, 138, 36, 105, 190, 243, -- e0-e7 175, 226, 53, 120, 214, 155, 76, 1, -- e0-ef 244, 185, 110, 35, 141, 192, 23, 90, -- f0-f7 6, 75, 156, 209, 127, 50, 229, 168 -- f0-ff ); begin return slv(to_unsigned(crc8_tbl(to_integer(unsigned(data xor crc))), 8)); end function crc8_update_tbl; -- crc16_update and crc16_update_tbl implement the CCITT polynomial -- x^16 + x^12 + x^5 + 1 (0x1021) -- function crc16_update (crc: in slv16; data: in slv8) return slv16 is variable n : slv16 := (others=>'0'); variable t : slv8 := (others=>'0'); begin t := data xor crc(15 downto 8); n(0) := t(4) xor t(0); n(1) := t(5) xor t(1); n(2) := t(6) xor t(2); n(3) := t(7) xor t(3); n(4) := t(4); n(5) := t(5) xor t(4) xor t(0); n(6) := t(6) xor t(5) xor t(1); n(7) := t(7) xor t(6) xor t(2); n(8) := t(7) xor t(3) xor crc(0); n(9) := t(4) xor crc(1); n(10) := t(5) xor crc(2); n(11) := t(6) xor crc(3); n(12) := t(7) xor t(4) xor t(0) xor crc(4); n(13) := t(5) xor t(1) xor crc(5); n(14) := t(6) xor t(2) xor crc(6); n(15) := t(7) xor t(3) xor crc(7); return n; end function crc16_update; function crc16_update_tbl (crc: in slv16; data: in slv8) return slv16 is type crc16_tbl_type is array (0 to 255) of integer; variable crc16_tbl : crc16_tbl_type := ( 0, 4129, 8258, 12387, 16516, 20645, 24774, 28903, 33032, 37161, 41290, 45419, 49548, 53677, 57806, 61935, 4657, 528, 12915, 8786, 21173, 17044, 29431, 25302, 37689, 33560, 45947, 41818, 54205, 50076, 62463, 58334, 9314, 13379, 1056, 5121, 25830, 29895, 17572, 21637, 42346, 46411, 34088, 38153, 58862, 62927, 50604, 54669, 13907, 9842, 5649, 1584, 30423, 26358, 22165, 18100, 46939, 42874, 38681, 34616, 63455, 59390, 55197, 51132, 18628, 22757, 26758, 30887, 2112, 6241, 10242, 14371, 51660, 55789, 59790, 63919, 35144, 39273, 43274, 47403, 23285, 19156, 31415, 27286, 6769, 2640, 14899, 10770, 56317, 52188, 64447, 60318, 39801, 35672, 47931, 43802, 27814, 31879, 19684, 23749, 11298, 15363, 3168, 7233, 60846, 64911, 52716, 56781, 44330, 48395, 36200, 40265, 32407, 28342, 24277, 20212, 15891, 11826, 7761, 3696, 65439, 61374, 57309, 53244, 48923, 44858, 40793, 36728, 37256, 33193, 45514, 41451, 53516, 49453, 61774, 57711, 4224, 161, 12482, 8419, 20484, 16421, 28742, 24679, 33721, 37784, 41979, 46042, 49981, 54044, 58239, 62302, 689, 4752, 8947, 13010, 16949, 21012, 25207, 29270, 46570, 42443, 38312, 34185, 62830, 58703, 54572, 50445, 13538, 9411, 5280, 1153, 29798, 25671, 21540, 17413, 42971, 47098, 34713, 38840, 59231, 63358, 50973, 55100, 9939, 14066, 1681, 5808, 26199, 30326, 17941, 22068, 55628, 51565, 63758, 59695, 39368, 35305, 47498, 43435, 22596, 18533, 30726, 26663, 6336, 2273, 14466, 10403, 52093, 56156, 60223, 64286, 35833, 39896, 43963, 48026, 19061, 23124, 27191, 31254, 2801, 6864, 10931, 14994, 64814, 60687, 56684, 52557, 48554, 44427, 40424, 36297, 31782, 27655, 23652, 19525, 15522, 11395, 7392, 3265, 61215, 65342, 53085, 57212, 44955, 49082, 36825, 40952, 28183, 32310, 20053, 24180, 11923, 16050, 3793, 7920 ); variable ch : slv16 := (others=>'0'); variable t : slv8 := (others=>'0'); variable td : integer := 0; begin -- (crc<<8) ^ crc16_tbl[((crc>>8) ^ data) & 0x00ff] ch := crc(7 downto 0) & "00000000"; t := data xor crc(15 downto 8); td := crc16_tbl(to_integer(unsigned(t))); return ch xor slv(to_unsigned(td, 16)); end function crc16_update_tbl; end package body comlib;
Go to most recent revision | Compare with Previous | Blame | View Log