| Line 1... |
Line 1... |
-------------------------------------------------------------------------------
|
-------------------------------------------------------------------------------
|
--
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--
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-- The Timer/Counter unit.
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-- The Timer/Counter unit.
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--
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--
|
-- $Id: timer.vhd,v 1.5 2004-07-11 16:51:33 arniml Exp $
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-- $Id: timer.vhd,v 1.6 2005-06-11 10:08:43 arniml Exp $
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--
|
--
|
-- Copyright (c) 2004, Arnim Laeuger (arniml@opencores.org)
|
-- Copyright (c) 2004, Arnim Laeuger (arniml@opencores.org)
|
--
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--
|
-- All rights reserved
|
-- All rights reserved
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--
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--
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| Line 47... |
Line 47... |
use ieee.std_logic_1164.all;
|
use ieee.std_logic_1164.all;
|
|
|
use work.t48_pack.word_t;
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use work.t48_pack.word_t;
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use work.t48_pack.mstate_t;
|
use work.t48_pack.mstate_t;
|
|
|
entity timer is
|
entity t48_timer is
|
|
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generic (
|
generic (
|
-- state in which T1 is sampled (3 or 4)
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-- state in which T1 is sampled (3 or 4)
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sample_t1_state_g : integer := 4
|
sample_t1_state_g : integer := 4
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);
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);
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| Line 73... |
Line 73... |
start_cnt_i : in boolean;
|
start_cnt_i : in boolean;
|
stop_tcnt_i : in boolean;
|
stop_tcnt_i : in boolean;
|
overflow_o : out std_logic
|
overflow_o : out std_logic
|
);
|
);
|
|
|
end timer;
|
end t48_timer;
|
|
|
|
|
library ieee;
|
library ieee;
|
use ieee.numeric_std.all;
|
use ieee.numeric_std.all;
|
|
|
use work.t48_pack.all;
|
use work.t48_pack.all;
|
|
|
architecture rtl of timer is
|
architecture rtl of t48_timer is
|
|
|
-- the 8 bit counter core
|
-- the 8 bit counter core
|
signal counter_q : unsigned(word_t'range);
|
signal counter_q : unsigned(word_t'range);
|
signal overflow_q : boolean;
|
signal overflow_q : boolean;
|
|
|
| Line 253... |
Line 253... |
|
|
-------------------------------------------------------------------------------
|
-------------------------------------------------------------------------------
|
-- File History:
|
-- File History:
|
--
|
--
|
-- $Log: not supported by cvs2svn $
|
-- $Log: not supported by cvs2svn $
|
|
-- Revision 1.5 2004/07/11 16:51:33 arniml
|
|
-- cleanup copyright notice
|
|
--
|
-- Revision 1.4 2004/07/04 13:06:45 arniml
|
-- Revision 1.4 2004/07/04 13:06:45 arniml
|
-- counter_q is not cleared during reset
|
-- counter_q is not cleared during reset
|
-- this would match all different descriptions of the Counter as
|
-- this would match all different descriptions of the Counter as
|
-- a) if the software assumes that the Counter is modified during reset, it
|
-- a) if the software assumes that the Counter is modified during reset, it
|
-- will initialize the Counter anyhow
|
-- will initialize the Counter anyhow
|
| Line 269... |
Line 272... |
-- increment prescaler with MSTATE4
|
-- increment prescaler with MSTATE4
|
--
|
--
|
-- Revision 1.1 2004/03/23 21:31:53 arniml
|
-- Revision 1.1 2004/03/23 21:31:53 arniml
|
-- initial check-in
|
-- initial check-in
|
--
|
--
|
--
|
|
-------------------------------------------------------------------------------
|
-------------------------------------------------------------------------------
|
|
|
No newline at end of file
|
No newline at end of file
|
