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-------------------------------------------------------------------------------
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-------------------------------------------------------------------------------
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--
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--
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-- The IN port controller.
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-- The IN port controller.
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--
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--
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-- $Id: t400_io_in.vhd,v 1.1 2006-05-22 00:00:55 arniml Exp $
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-- $Id: t400_io_in.vhd,v 1.2 2006-05-23 01:13:28 arniml Exp $
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--
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--
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-- Copyright (c) 2006 Arnim Laeuger (arniml@opencores.org)
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-- Copyright (c) 2006 Arnim Laeuger (arniml@opencores.org)
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--
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--
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-- All rights reserved
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-- All rights reserved
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--
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--
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--
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--
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seq: process (ck_i, por_i)
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seq: process (ck_i, por_i)
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variable neg_edge_v : std_logic_vector(2 downto 0);
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variable neg_edge_v : std_logic_vector(2 downto 0);
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begin
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begin
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if por_i then
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if por_i then
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neg_edge_q <= (others => (others => '1'));
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neg_edge_q <= (others => (others => '0'));
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il_q <= (others => '0');
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il_q <= (others => '0');
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elsif ck_i'event and ck_i = '1' then
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elsif ck_i'event and ck_i = '1' then
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-- negative edge detector filp-flops ------------------------------------
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-- negative edge detector filp-flops ------------------------------------
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neg_edge_v(idx_in3_c) := io_in_i(3);
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neg_edge_v(idx_in3_c) := to_X01(io_in_i(3));
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neg_edge_v(idx_in0_c) := io_in_i(0);
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neg_edge_v(idx_in0_c) := to_X01(io_in_i(0));
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neg_edge_v(idx_int_c) := io_in_i(1);
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neg_edge_v(idx_int_c) := to_X01(io_in_i(1));
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if in_en_i then
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if in_en_i then
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neg_edge_q(0) <= neg_edge_v;
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neg_edge_q(0) <= neg_edge_v;
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neg_edge_q(1) <= neg_edge_q(0) or neg_edge_v;
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neg_edge_q(1) <= neg_edge_q(0) or neg_edge_v;
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end if;
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end if;
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-------------------------------------------------------------------------------
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-------------------------------------------------------------------------------
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-- File History:
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-- File History:
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--
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--
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-- $Log: not supported by cvs2svn $
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-- $Log: not supported by cvs2svn $
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-- Revision 1.1 2006/05/22 00:00:55 arniml
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-- initial check-in
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--
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-------------------------------------------------------------------------------
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-------------------------------------------------------------------------------
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No newline at end of file
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No newline at end of file
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