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-- $Id: sys_conf.vhd 788 2016-07-16 22:23:23Z mueller $

--

-- Copyright 2013-2016 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:   sys_conf

-- Description:    Definitions for sys_tst_sram_n4 (for synthesis)

--

-- Dependencies:   -

-- Tool versions:  ise 14.5-14.7; viv 2014.4-2016.2; ghdl 0.29-0.33

-- Revision History: 

-- Date         Rev Version  Comment

-- 2016-07-16   788   1.2    use cram_*delay functions to determine delays

-- 2016-06-18   775   1.1.1  use PLL for clkser_gentype

-- 2016-03-29   756   1.1    use serport_2clock2 -> define clkser

-- 2013-09-21   534   1.0    Initial version 

------------------------------------------------------------------------------

library ieee;

use ieee.std_logic_1164.all;

use work.slvtypes.all;

use work.nxcramlib.all;

package sys_conf is

  constant sys_conf_clksys_vcodivide   : positive :=   1;

  constant sys_conf_clksys_vcomultiply : positive :=   1;   -- vco  --- MHz

  constant sys_conf_clksys_outdivide   : positive :=   1;   -- sys  100 MHz

  constant sys_conf_clksys_gentype     : string   := "MMCM";

  -- dual clock design, clkser = 120 MHz

  constant sys_conf_clkser_vcodivide   : positive :=   1;

  constant sys_conf_clkser_vcomultiply : positive :=  12;   -- vco 1200 MHz

  constant sys_conf_clkser_outdivide   : positive :=  10;   -- sys  120 MHz

  constant sys_conf_clkser_gentype     : string   := "PLL";

  constant sys_conf_ser2rri_defbaud : integer := 115200;   -- default 115k baud

  -- derived constants

  constant sys_conf_clksys : integer :=

    ((100000000/sys_conf_clksys_vcodivide)*sys_conf_clksys_vcomultiply) /

    sys_conf_clksys_outdivide;

  constant sys_conf_clksys_mhz : integer := sys_conf_clksys/1000000;

  constant sys_conf_clkser : integer :=

     ((100000000/sys_conf_clkser_vcodivide)*sys_conf_clkser_vcomultiply) /

    sys_conf_clkser_outdivide;

  constant sys_conf_clkser_mhz : integer := sys_conf_clkser/1000000;

  constant sys_conf_ser2rri_cdinit : integer :=

    (sys_conf_clkser/sys_conf_ser2rri_defbaud)-1;

  constant sys_conf_memctl_read0delay : positive :=

              cram_read0delay(sys_conf_clksys_mhz);

  constant sys_conf_memctl_read1delay : positive :=

              cram_read1delay(sys_conf_clksys_mhz);

  constant sys_conf_memctl_writedelay : positive :=

              cram_writedelay(sys_conf_clksys_mhz);

end package sys_conf;