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-- $Id: crc8.vhd 314 2010-07-09 17:38:41Z mueller $
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-- $Id: crc8.vhd 406 2011-08-14 21:06:44Z mueller $
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--
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--
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-- Copyright 2007- by Walter F.J. Mueller <W.F.J.Mueller@gsi.de>
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-- Copyright 2007-2011 by Walter F.J. Mueller <W.F.J.Mueller@gsi.de>
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--
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--
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-- This program is free software; you may redistribute and/or modify it under
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-- This program is free software; you may redistribute and/or modify it under
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-- the terms of the GNU General Public License as published by the Free
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-- the terms of the GNU General Public License as published by the Free
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-- Software Foundation, either version 2, or at your option any later version.
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-- Software Foundation, either version 2, or at your option any later version.
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--
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--
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-- little larger than with xor's.
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-- little larger than with xor's.
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--
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--
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-- Dependencies: -
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-- Dependencies: -
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-- Test bench: -
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-- Test bench: -
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-- Target Devices: generic
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-- Target Devices: generic
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-- Tool versions: xst 8.1, 8.2, 9.1, 9.2; ghdl 0.18-0.25
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-- Tool versions: xst 8.1, 8.2, 9.1, 9.2,.., 13.1; ghdl 0.18-0.25
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-- Revision History:
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-- Revision History:
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-- Date Rev Version Comment
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-- Date Rev Version Comment
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-- 2011-08-14 406 1.0.1 remove superfluous variable r
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-- 2007-07-08 65 1.0 Initial version
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-- 2007-07-08 65 1.0 Initial version
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------------------------------------------------------------------------------
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------------------------------------------------------------------------------
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library ieee;
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library ieee;
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use ieee.std_logic_1164.all;
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use ieee.std_logic_1164.all;
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end if;
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end if;
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end process proc_regs;
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end process proc_regs;
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proc_next: process (R_CRC, DI, ENA)
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proc_next: process (R_CRC, DI, ENA)
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variable r : slv8 := INIT;
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variable n : slv8 := INIT;
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variable n : slv8 := INIT;
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begin
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begin
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r := R_CRC;
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n := R_CRC;
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n := R_CRC;
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if ENA = '1' then
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if ENA = '1' then
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crc8_update(n, DI);
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crc8_update(n, DI);
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end if;
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end if;
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