-- PROJECT: D0 Run IIb Trigger L1 Calorimeter upgrade
--
-- MODULE: RS232 to generic bus converter
--
-- ELEMENT:  constant_package 
--
-- DESCRIPTION: definition of various constants 
--
-- AUTHOR: J.Marquet marquet@efrei.fr
--
-- DATE AND HISTORY:
--  July 2004: created
--  September 2004: revised by D.Calvet
--------------------------------------------------------------------------------

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

library ieee;
use IEEE.STD_LOGIC_1164.all;
use IEEE.NUMERIC_BIT.all;

package constant_package is

--------------------------------------------------------------------------------------
-- The DEFAULT_BAUD_RATE is the value used by gate synthesizer.
-- It should be set to the desired value before compiling the FPGA code driving
-- the real hardware. A different baud rate is set for simulation only in the 
-- appropriate testbench.
--
constant DEFAULT_BAUD_RATE : integer := 57600;
--------------------------------------------------------------------------------------

--------------------------------------------------------------------------------------
-- The FREQ_REF is the reference clock for the setting the baud rate to
-- the correct value. The 24 MHz on-board oscillator of the actual hardware is used.
-- This value must not be modified unless another reference clock is used.  
constant FREQ_REF          : integer := 24000000;  -- 24 MHz reference clock
--------------------------------------------------------------------------------------

--------------------------------------------------------------------------------------
--
-- Code of ASCII characters used 
--
constant ascii_I        : std_logic_vector(7 downto 0) := "01001001"; -- Code ascii de I
constant ascii_R        : std_logic_vector(7 downto 0) := "01010010"; -- Code ascii de R
constant ascii_W        : std_logic_vector(7 downto 0) := "01010111"; -- Code ascii de W	
constant ascii_Q        : std_logic_vector(7 downto 0) := "01010001"; -- Code ascii de Q
constant ascii_question : std_logic_vector(7 downto 0) := "00111111"; -- Code ascii de ?
constant ascii_space    : std_logic_vector(7 downto 0) := "00100000"; -- Code ascii de " " 
constant ascii_cr       : std_logic_vector(7 downto 0) := "00001101"; -- Code ascii de "cr"
constant ascii_lf       : std_logic_vector(7 downto 0) := "00001010"; -- Code ascii de "lf"
constant ascii_0        : std_logic_vector(7 downto 0) := "00110000"; -- Code ascii de 0
constant ascii_1        : std_logic_vector(7 downto 0) := "00110001"; -- Code ascii de 1
constant ascii_2        : std_logic_vector(7 downto 0) := "00110010"; -- Code ascii de 2
constant ascii_3        : std_logic_vector(7 downto 0) := "00110011"; -- Code ascii de 3
constant ascii_4        : std_logic_vector(7 downto 0) := "00110100"; -- Code ascii de 4
constant ascii_5        : std_logic_vector(7 downto 0) := "00110101"; -- Code ascii de 5
constant ascii_6        : std_logic_vector(7 downto 0) := "00110110"; -- Code ascii de 6
constant ascii_7        : std_logic_vector(7 downto 0) := "00110111"; -- Code ascii de 7
constant ascii_8        : std_logic_vector(7 downto 0) := "00111000"; -- Code ascii de 8
constant ascii_9        : std_logic_vector(7 downto 0) := "00111001"; -- Code ascii de 9
constant ascii_A        : std_logic_vector(7 downto 0) := "01000001"; -- Code ascci de A	
constant ascii_B        : std_logic_vector(7 downto 0) := "01000010"; -- Code ascii de B
constant ascii_C        : std_logic_vector(7 downto 0) := "01000011"; -- Code ascii de C
constant ascii_D        : std_logic_vector(7 downto 0) := "01000100"; -- Code ascii de D
constant ascii_E        : std_logic_vector(7 downto 0) := "01000101"; -- Code ascii de E
constant ascii_F        : std_logic_vector(7 downto 0) := "01000110"; -- Code ascii de F
--------------------------------------------------------------------------------------

end constant_package;

package body constant_package is

end constant_package;